mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-24 20:33:31 +01:00
Import timeouts.c directly from William Ahern's git.
Imported from here: https://github.com/wahern/timeout Imported as of upstream e5a9e8bfaa9c631bdc54002181795931b65bdc1a. All sources unmodified.
This commit is contained in:
parent
0e354ad459
commit
32e80ea3d3
@ -73,3 +73,7 @@ readpassphrase.[ch]
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Portable readpassphrase implementation from OpenSSH portable, version
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6.8p1.
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timeouts/
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William Ahern's hierarchical timer-wheel implementation. MIT license.
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@ -10,6 +10,8 @@ EXTHEADERS = \
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src/ext/tor_readpassphrase.h \
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src/ext/strlcat.c \
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src/ext/strlcpy.c \
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src/ext/timeouts/timeout.h \
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src/ext/timeouts/timeout-debug.h \
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src/ext/tinytest_macros.h \
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src/ext/tor_queue.h \
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src/ext/siphash.h
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@ -148,3 +150,26 @@ noinst_HEADERS += $(LIBKECCAK_TINY_HDRS)
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LIBKECCAK_TINY=src/ext/keccak-tiny/libkeccak-tiny.a
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noinst_LIBRARIES += $(LIBKECCAK_TINY)
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EXTRA_DIST += \
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timeouts/bench/bench-add.lua \
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timeouts/bench/bench-aux.lua \
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timeouts/bench/bench.c \
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timeouts/bench/bench-del.lua \
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timeouts/bench/bench-expire.lua \
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timeouts/bench/bench.h \
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timeouts/bench/bench-heap.c \
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timeouts/bench/bench-llrb.c \
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timeouts/bench/bench.plt \
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timeouts/bench/bench-wheel.c \
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timeouts/bench/Rules.mk \
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timeouts/lua/Rules.mk \
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timeouts/lua/timeout-lua.c \
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timeouts/Makefile \
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timeouts/Rules.shrc \
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timeouts/test-timeout.c
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# XXXX Once we use timeouts, include this in an actual library.
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EXTRA_DIST += \
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timeouts/timeout-bitops.c \
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timeout.c
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68
src/ext/timeouts/Makefile
Normal file
68
src/ext/timeouts/Makefile
Normal file
@ -0,0 +1,68 @@
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# NOTE: GNU Make 3.81 won't export MAKEFLAGS if .POSIX is specified, but
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# Solaris make won't export MAKEFLAGS unless .POSIX is specified.
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$(firstword ignore).POSIX:
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.DEFAULT_GOAL = all
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.SUFFIXES:
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all:
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#
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# USER-MODIFIABLE MACROS
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#
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top_srcdir = .
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top_builddir = .
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CFLAGS = -O2 -march=native -g -Wall -Wextra -Wno-unused-parameter -Wno-unused-function
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SOFLAGS = $$(auto_soflags)
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LIBS = $$(auto_libs)
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ALL_CPPFLAGS = -I$(top_srcdir) -DWHEEL_BIT=$(WHEEL_BIT) -DWHEEL_NUM=$(WHEEL_NUM) $(CPPFLAGS)
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ALL_CFLAGS = $(CFLAGS)
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ALL_SOFLAGS = $(SOFLAGS)
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ALL_LDFLAGS = $(LDFLAGS)
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ALL_LIBS = $(LIBS)
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LUA_API = 5.3
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LUA = lua
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LUA51_CPPFLAGS = $(LUA_CPPFLAGS)
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LUA52_CPPFLAGS = $(LUA_CPPFLAGS)
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LUA53_CPPFLAGS = $(LUA_CPPFLAGS)
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WHEEL_BIT = 6
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WHEEL_NUM = 4
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RM = rm -f
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# END MACROS
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SHRC = \
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top_srcdir="$(top_srcdir)"; \
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top_builddir="$(top_builddir)"; \
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. "$${top_srcdir}/Rules.shrc"
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LUA_APIS = 5.1 5.2 5.3
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include $(top_srcdir)/lua/Rules.mk
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include $(top_srcdir)/bench/Rules.mk
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all: test-timeout
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timeout.o: $(top_srcdir)/timeout.c
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test-timeout.o: $(top_srcdir)/test-timeout.c
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timeout.o test-timeout.o:
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@$(SHRC); echo_cmd $(CC) $(ALL_CFLAGS) -c -o $@ $${top_srcdir}/$(@F:%.o=%.c) $(ALL_CPPFLAGS)
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test-timeout: timeout.o test-timeout.o
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@$(SHRC); echo_cmd $(CC) $(ALL_CPPFLAGS) $(ALL_CFLAGS) -o $@ timeout.o test-timeout.o
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.PHONY: clean clean~
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clean:
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$(RM) $(top_builddir)/test-timeout $(top_builddir)/*.o
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$(RM) -r $(top_builddir)/*.dSYM
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clean~:
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find $(top_builddir) $(top_srcdir) -name "*~" -exec $(RM) -- {} "+"
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src/ext/timeouts/Rules.shrc
Normal file
40
src/ext/timeouts/Rules.shrc
Normal file
@ -0,0 +1,40 @@
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# convert to absolute paths
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top_srcdir="$(cd "${top_srcdir}" && pwd -L)"
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top_builddir="$(cd "${top_builddir}" && pwd -L)"
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# Paths for Lua modules (benchmarks and installed modules)
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export LUA_CPATH="${top_builddir}/lua/5.1/?.so;${top_builddir}/bench/?.so;;"
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export LUA_PATH="${top_srcdir}/lua/?.lua;${top_srcdir}/bench/?.lua;;"
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export LUA_CPATH_5_2="${top_builddir}/lua/5.2/?.so;${top_builddir}/bench/?.so;;"
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export LUA_PATH_5_2="${top_srcdir}/lua/?.lua;${top_srcdir}/bench/?.lua;;"
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export LUA_CPATH_5_3="${top_builddir}/lua/5.3/?.so;${top_builddir}/bench/?.so;;"
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export LUA_PATH_5_3="${top_srcdir}/lua/?.lua;${top_srcdir}/bench/?.lua;;"
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# preserve stdout so we can print commands to terminal
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exec 9>&1;
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echo_cmd() {
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printf "%s\n" "$*" >&9;
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"$@";
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}
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auto_soflags() {
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case "$(uname -s)" in
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Darwin)
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printf -- "-bundle -undefined dynamic_lookup"
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;;
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*)
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printf -- "-fPIC -shared"
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;;
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esac
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}
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auto_libs() {
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case "$(uname -s)" in
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Linux)
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printf -- "-lrt"
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;;
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*)
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;;
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esac
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}
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49
src/ext/timeouts/bench/Rules.mk
Normal file
49
src/ext/timeouts/bench/Rules.mk
Normal file
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BENCH_MODS = bench.so $(BENCH_ALGOS:%=bench-%.so)
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BENCH_ALGOS = wheel heap llrb
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BENCH_OPS = add del expire
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$(top_builddir)/bench/bench.so: $(top_srcdir)/bench/bench.c
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$(top_builddir)/bench/bench-wheel.so: $(top_srcdir)/bench/bench-wheel.c
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$(top_builddir)/bench/bench-heap.so: $(top_srcdir)/bench/bench-heap.c
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$(top_builddir)/bench/bench-llrb.so: $(top_srcdir)/bench/bench-llrb.c
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$(BENCH_MODS:%=$(top_builddir)/bench/%): $(top_srcdir)/timeout.h $(top_srcdir)/timeout.c $(top_srcdir)/bench/bench.h
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mkdir -p $(@D)
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@$(SHRC); echo_cmd $(CC) -o $@ $(top_srcdir)/bench/$(@F:%.so=%.c) $(ALL_CPPFLAGS) $(ALL_CFLAGS) $(ALL_SOFLAGS) $(ALL_LDFLAGS) $(ALL_LIBS)
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$(BENCH_OPS:%=$(top_builddir)/bench/wheel-%.dat): $(top_builddir)/bench/bench-wheel.so $(top_builddir)/bench/bench.so $(top_srcdir)/bench/bench-aux.lua
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$(BENCH_OPS:%=$(top_builddir)/bench/heap-%.dat): $(top_builddir)/bench/bench-heap.so $(top_builddir)/bench/bench.so $(top_srcdir)/bench/bench-aux.lua
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$(BENCH_OPS:%=$(top_builddir)/bench/llrb-%.dat): $(top_builddir)/bench/bench-llrb.so $(top_builddir)/bench/bench.so $(top_srcdir)/bench/bench-aux.lua
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$(BENCH_ALGOS:%=$(top_builddir)/bench/%-add.dat): $(top_srcdir)/bench/bench-add.lua
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@$(SHRC); echo_cmd cd $(@D) && echo_cmd $(LUA) $${top_srcdir}/bench/bench-add.lua $${top_builddir}/bench/bench-$(@F:%-add.dat=%).so > $(@F).tmp
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mv $@.tmp $@
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$(BENCH_ALGOS:%=$(top_builddir)/bench/%-del.dat): $(top_srcdir)/bench/bench-del.lua
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@$(SHRC); echo_cmd cd $(@D) && echo_cmd $(LUA) $${top_srcdir}/bench/bench-del.lua $${top_builddir}/bench/bench-$(@F:%-del.dat=%).so > $(@F).tmp
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mv $@.tmp $@
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$(BENCH_ALGOS:%=$(top_builddir)/bench/%-expire.dat): $(top_srcdir)/bench/bench-expire.lua
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@$(SHRC); echo_cmd cd $(@D) && echo_cmd $(LUA) $${top_srcdir}/bench/bench-expire.lua $${top_builddir}/bench/bench-$(@F:%-expire.dat=%).so > $(@F).tmp
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mv $@.tmp $@
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$(top_builddir)/bench/bench.eps: \
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$(BENCH_OPS:%=$(top_builddir)/bench/wheel-%.dat) \
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$(BENCH_OPS:%=$(top_builddir)/bench/heap-%.dat)
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# $(BENCH_OPS:%=$(top_builddir)/bench/llrb-%.dat)
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$(top_builddir)/bench/bench.eps: $(top_srcdir)/bench/bench.plt
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@$(SHRC); echo_cmd cd $(@D) && echo_cmd gnuplot $${top_srcdir}/bench/bench.plt > $(@F).tmp
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mv $@.tmp $@
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$(top_builddir)/bench/bench.pdf: $(top_builddir)/bench/bench.eps
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@$(SHRC); echo_cmd ps2pdf $${top_builddir}/bench/bench.eps $@
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bench-mods: $(BENCH_MODS:%=$(top_builddir)/bench/%)
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bench-all: $(top_builddir)/bench/bench.pdf
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bench-clean:
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$(RM) -r $(top_builddir)/bench/*.so $(top_builddir)/bench/*.dSYM
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$(RM) $(top_builddir)/bench/*.dat $(top_builddir)/bench/*.tmp
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$(RM) $(top_builddir)/bench/bench.{eps,pdf}
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30
src/ext/timeouts/bench/bench-add.lua
Executable file
30
src/ext/timeouts/bench/bench-add.lua
Executable file
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#!/usr/bin/env lua
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local bench = require"bench"
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local aux = require"bench-aux"
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local lib = ... or aux.optenv("BENCH_L", "bench-wheel.so")
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local limit = tonumber(aux.optenv("BENCH_N", 1000000))
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local step = tonumber(aux.optenv("BENCH_S", limit / 100))
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local exp_step = tonumber(aux.optenv("BENCH_E", 1.0))
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local verbose = aux.toboolean(os.getenv("BENCH_V", false))
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local B = bench.new(lib, count, nil, verbose)
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local fill_count, fill_last = B:fill(limit)
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for i=0,limit,step do
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local exp_elapsed, fill_elapsed, fill_rate
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-- expire all timeouts
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--exp_elapsed = aux.time(B.expire, B, fill_count, fill_last * exp_step)
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exp_elapsed = aux.time(B.del, B, 0, fill_count)
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assert(B:empty())
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-- add i timeouts
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fill_elapsed, fill_count, fill_last = aux.time(B.fill, B, i)
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assert(fill_count == i)
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fill_rate = fill_elapsed > 0 and (fill_count / fill_elapsed) or 0
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local fmt = verbose and "%d\t%f\t(%d/s)\t(exp:%f)" or "%d\t%f"
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aux.say(fmt, i, fill_elapsed, fill_rate, exp_elapsed)
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end
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30
src/ext/timeouts/bench/bench-aux.lua
Normal file
30
src/ext/timeouts/bench/bench-aux.lua
Normal file
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local bench = require"bench"
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local clock = bench.clock
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local aux = {}
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local function time_return(begun, ...)
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local duration = clock() - begun
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return duration, ...
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end
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function aux.time(f, ...)
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local begun = clock()
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return time_return(begun, f(...))
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end
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function aux.say(...)
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print(string.format(...))
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end
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function aux.toboolean(s)
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return tostring(s):match("^[1TtYy]") and true or false
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end
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function aux.optenv(k, def)
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local s = os.getenv(k)
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return (s and #s > 0 and s) or def
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end
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return aux
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25
src/ext/timeouts/bench/bench-del.lua
Executable file
25
src/ext/timeouts/bench/bench-del.lua
Executable file
@ -0,0 +1,25 @@
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#!/usr/bin/env lua
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local bench = require"bench"
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local aux = require"bench-aux"
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local lib = ... or aux.optenv("BENCH_L", "bench-wheel.so")
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local limit = tonumber(aux.optenv("BENCH_N", 1000000))
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local step = tonumber(aux.optenv("BENCH_S", limit / 100))
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local verbose = aux.toboolean(os.getenv("BENCH_V", false))
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local B = bench.new(lib, count)
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for i=0,limit,step do
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-- add i timeouts
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local fill_elapsed, fill_count = aux.time(B.fill, B, i, 60 * 1000000)
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assert(i == fill_count)
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--- delete i timeouts
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local del_elapsed = aux.time(B.del, B, 0, fill_count)
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assert(B:empty())
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local del_rate = i > 0 and i / del_elapsed or 0
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local fmt = verbose and "%d\t%f\t(%d/s)\t(fill:%f)" or "%d\t%f"
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aux.say(fmt, i, del_elapsed, del_rate, fill_elapsed)
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end
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29
src/ext/timeouts/bench/bench-expire.lua
Executable file
29
src/ext/timeouts/bench/bench-expire.lua
Executable file
@ -0,0 +1,29 @@
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#!/usr/bin/env lua
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local bench = require"bench"
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local aux = require"bench-aux"
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local lib = ... or aux.optenv("BENCH_L", "bench-wheel.so")
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local limit = tonumber(aux.optenv("BENCH_N", 1000000))
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local step = tonumber(aux.optenv("BENCH_S", limit / 100))
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-- expire 1/1000 * #timeouts per clock update
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local exp_step = tonumber(aux.optenv("BENCH_E", 0.0001))
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local verbose = aux.toboolean(os.getenv("BENCH_V", false))
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local B = require"bench".new(lib, count)
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for i=0,limit,step do
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-- add i timeouts
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local fill_elapsed, fill_count, fill_last = aux.time(B.fill, B, i)
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-- expire timeouts by iteratively updating clock. exp_step is the
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-- approximate number of timeouts (as a fraction of the total number
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-- of timeouts) that will expire per update.
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local exp_elapsed, exp_count = aux.time(B.expire, B, fill_count, math.floor(fill_last * exp_step))
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assert(exp_count == i)
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assert(B:empty())
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local exp_rate = i > 0 and i / exp_elapsed or 0
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local fmt = verbose and "%d\t%f\t(%d/s)\t(fill:%f)" or "%d\t%f"
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aux.say(fmt, i, exp_elapsed, exp_rate, fill_elapsed)
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end
|
236
src/ext/timeouts/bench/bench-heap.c
Normal file
236
src/ext/timeouts/bench/bench-heap.c
Normal file
@ -0,0 +1,236 @@
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/*
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* Copyright (c) 2006 Maxim Yegorushkin <maxim.yegorushkin@gmail.com>
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||||
* All rights reserved.
|
||||
*
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||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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||||
*/
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||||
#ifndef _MIN_HEAP_H_
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||||
#define _MIN_HEAP_H_
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||||
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||||
#include <stdlib.h>
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||||
#include <err.h>
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||||
#include "timeout.h"
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||||
#include "bench.h"
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||||
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||||
#define min_heap_idx interval
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||||
typedef timeout_t min_heap_idx_t;
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||||
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typedef struct min_heap
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||||
{
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||||
struct timeout** p;
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unsigned n, a;
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||||
timeout_t curtime;
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||||
} min_heap_t;
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||||
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||||
static inline void min_heap_ctor(min_heap_t* s);
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||||
static inline void min_heap_dtor(min_heap_t* s);
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||||
static inline void min_heap_elem_init(struct timeout* e);
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static inline int min_heap_elem_greater(struct timeout *a, struct timeout *b);
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static inline int min_heap_empty(min_heap_t* s);
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||||
static inline unsigned min_heap_size(min_heap_t* s);
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static inline struct timeout* min_heap_top(min_heap_t* s);
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static inline int min_heap_reserve(min_heap_t* s, unsigned n);
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static inline int min_heap_push(min_heap_t* s, struct timeout* e);
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static inline struct timeout* min_heap_pop(min_heap_t* s);
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static inline int min_heap_erase(min_heap_t* s, struct timeout* e);
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static inline void min_heap_shift_up_(min_heap_t* s, unsigned hole_index, struct timeout* e);
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static inline void min_heap_shift_down_(min_heap_t* s, unsigned hole_index, struct timeout* e);
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||||
|
||||
int min_heap_elem_greater(struct timeout *a, struct timeout *b)
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||||
{
|
||||
return a->expires > b->expires;
|
||||
}
|
||||
|
||||
void min_heap_ctor(min_heap_t* s) { s->p = 0; s->n = 0; s->a = 0; }
|
||||
void min_heap_dtor(min_heap_t* s) { if(s->p) free(s->p); }
|
||||
void min_heap_elem_init(struct timeout* e) { e->min_heap_idx = -1; }
|
||||
int min_heap_empty(min_heap_t* s) { return 0u == s->n; }
|
||||
unsigned min_heap_size(min_heap_t* s) { return s->n; }
|
||||
struct timeout* min_heap_top(min_heap_t* s) { return s->n ? *s->p : 0; }
|
||||
|
||||
int min_heap_push(min_heap_t* s, struct timeout* e)
|
||||
{
|
||||
if(min_heap_reserve(s, s->n + 1))
|
||||
return -1;
|
||||
min_heap_shift_up_(s, s->n++, e);
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct timeout* min_heap_pop(min_heap_t* s)
|
||||
{
|
||||
if(s->n)
|
||||
{
|
||||
struct timeout* e = *s->p;
|
||||
min_heap_shift_down_(s, 0u, s->p[--s->n]);
|
||||
e->min_heap_idx = -1;
|
||||
return e;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
int min_heap_erase(min_heap_t* s, struct timeout* e)
|
||||
{
|
||||
if(((min_heap_idx_t)-1) != e->min_heap_idx)
|
||||
{
|
||||
struct timeout *last = s->p[--s->n];
|
||||
unsigned parent = (e->min_heap_idx - 1) / 2;
|
||||
/* we replace e with the last element in the heap. We might need to
|
||||
shift it upward if it is less than its parent, or downward if it is
|
||||
greater than one or both its children. Since the children are known
|
||||
to be less than the parent, it can't need to shift both up and
|
||||
down. */
|
||||
if (e->min_heap_idx > 0 && min_heap_elem_greater(s->p[parent], last))
|
||||
min_heap_shift_up_(s, e->min_heap_idx, last);
|
||||
else
|
||||
min_heap_shift_down_(s, e->min_heap_idx, last);
|
||||
e->min_heap_idx = -1;
|
||||
return 0;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
int min_heap_reserve(min_heap_t* s, unsigned n)
|
||||
{
|
||||
if(s->a < n)
|
||||
{
|
||||
struct timeout** p;
|
||||
unsigned a = s->a ? s->a * 2 : 8;
|
||||
if(a < n)
|
||||
a = n;
|
||||
if(!(p = (struct timeout**)realloc(s->p, a * sizeof *p)))
|
||||
return -1;
|
||||
s->p = p;
|
||||
s->a = a;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void min_heap_shift_up_(min_heap_t* s, unsigned hole_index, struct timeout* e)
|
||||
{
|
||||
unsigned parent = (hole_index - 1) / 2;
|
||||
while(hole_index && min_heap_elem_greater(s->p[parent], e))
|
||||
{
|
||||
(s->p[hole_index] = s->p[parent])->min_heap_idx = hole_index;
|
||||
hole_index = parent;
|
||||
parent = (hole_index - 1) / 2;
|
||||
}
|
||||
(s->p[hole_index] = e)->min_heap_idx = hole_index;
|
||||
}
|
||||
|
||||
void min_heap_shift_down_(min_heap_t* s, unsigned hole_index, struct timeout* e)
|
||||
{
|
||||
unsigned min_child = 2 * (hole_index + 1);
|
||||
while(min_child <= s->n)
|
||||
{
|
||||
min_child -= min_child == s->n || min_heap_elem_greater(s->p[min_child], s->p[min_child - 1]);
|
||||
if(!(min_heap_elem_greater(e, s->p[min_child])))
|
||||
break;
|
||||
(s->p[hole_index] = s->p[min_child])->min_heap_idx = hole_index;
|
||||
hole_index = min_child;
|
||||
min_child = 2 * (hole_index + 1);
|
||||
}
|
||||
min_heap_shift_up_(s, hole_index, e);
|
||||
}
|
||||
|
||||
#endif /* _MIN_HEAP_H_ */
|
||||
|
||||
|
||||
static void *init(struct timeout *timeout, size_t count, int verbose) {
|
||||
min_heap_t *H;
|
||||
size_t i;
|
||||
|
||||
H = calloc(1, sizeof *H);
|
||||
|
||||
min_heap_ctor(H);
|
||||
if (0 != min_heap_reserve(H, count))
|
||||
err(1, "realloc");
|
||||
|
||||
for (i = 0; i < count; i++) {
|
||||
min_heap_elem_init(&timeout[i]);
|
||||
}
|
||||
|
||||
return H;
|
||||
} /* init() */
|
||||
|
||||
|
||||
static void add(void *ctx, struct timeout *to, timeout_t expires) {
|
||||
min_heap_t *H = ctx;
|
||||
min_heap_erase(H, to);
|
||||
to->expires = H->curtime + expires;
|
||||
if (0 != min_heap_push(H, to))
|
||||
err(1, "realloc");
|
||||
} /* add() */
|
||||
|
||||
|
||||
static void del(void *ctx, struct timeout *to) {
|
||||
min_heap_erase(ctx, to);
|
||||
} /* del() */
|
||||
|
||||
|
||||
static struct timeout *get(void *ctx) {
|
||||
min_heap_t *H = ctx;
|
||||
struct timeout *to;
|
||||
|
||||
if ((to = min_heap_top(H)) && to->expires <= H->curtime)
|
||||
return min_heap_pop(H);
|
||||
|
||||
return NULL;
|
||||
} /* get() */
|
||||
|
||||
|
||||
static void update(void *ctx, timeout_t ts) {
|
||||
min_heap_t *H = ctx;
|
||||
H->curtime = ts;
|
||||
} /* update() */
|
||||
|
||||
|
||||
static void check(void *ctx) {
|
||||
return;
|
||||
} /* check() */
|
||||
|
||||
|
||||
static int empty(void *ctx) {
|
||||
min_heap_t *H = ctx;
|
||||
|
||||
return (NULL == min_heap_top(H));
|
||||
} /* empty() */
|
||||
|
||||
|
||||
static void destroy(void *H) {
|
||||
free(H);
|
||||
return;
|
||||
} /* destroy() */
|
||||
|
||||
|
||||
const struct benchops benchops = {
|
||||
.init = &init,
|
||||
.add = &add,
|
||||
.del = &del,
|
||||
.get = &get,
|
||||
.update = &update,
|
||||
.check = &check,
|
||||
.empty = &empty,
|
||||
.destroy = &destroy,
|
||||
};
|
||||
|
425
src/ext/timeouts/bench/bench-llrb.c
Normal file
425
src/ext/timeouts/bench/bench-llrb.c
Normal file
@ -0,0 +1,425 @@
|
||||
/* ==========================================================================
|
||||
* llrb.h - Iterative Left-leaning Red-Black Tree.
|
||||
* --------------------------------------------------------------------------
|
||||
* Copyright (c) 2011, 2013 William Ahern <william@25thandClement.com>
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a
|
||||
* copy of this software and associated documentation files (the
|
||||
* "Software"), to deal in the Software without restriction, including
|
||||
* without limitation the rights to use, copy, modify, merge, publish,
|
||||
* distribute, sublicense, and/or sell copies of the Software, and to permit
|
||||
* persons to whom the Software is furnished to do so, subject to the
|
||||
* following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included
|
||||
* in all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
||||
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
||||
* NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
||||
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
||||
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
||||
* USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||||
* --------------------------------------------------------------------------
|
||||
* CREDITS:
|
||||
* o Algorithm courtesy of Robert Sedgewick, "Left-leaning Red-Black
|
||||
* Trees" (September 2008); and Robert Sedgewick and Kevin Wayne,
|
||||
* Algorithms (4th ed. 2011).
|
||||
*
|
||||
* Sedgewick touts the simplicity of the recursive implementation,
|
||||
* but at least for the 2-3 tree variant the iterative approach is
|
||||
* almost line-for-line identical. The magic of C pointers helps;
|
||||
* it'd be uglier with Java.
|
||||
*
|
||||
* A couple of missing NULL checks were added to Sedgewick's deletion
|
||||
* example, and insert was optimized to short-circuit rotations when
|
||||
* walking up the tree.
|
||||
*
|
||||
* o Code implemented in the fashion of Niels Provos' excellent *BSD
|
||||
* sys/tree.h pre-processor library.
|
||||
*
|
||||
* Regarding relative performance, I've refrained from sharing my own
|
||||
* benchmarks. Differences in run-time speed were too correlated to
|
||||
* compiler options and other external factors.
|
||||
*
|
||||
* Provos' delete implementation doesn't need to start at the root of
|
||||
* the tree. However, RB_REMOVE must be passed the actual node to be
|
||||
* removed. LLRB_REMOVE merely requires a key, much like
|
||||
* RB_FIND/LLRB_FIND.
|
||||
* ==========================================================================
|
||||
*/
|
||||
#ifndef LLRB_H
|
||||
#define LLRB_H
|
||||
|
||||
#define LLRB_VENDOR "william@25thandClement.com"
|
||||
#define LLRB_VERSION 0x20130925
|
||||
|
||||
#ifndef LLRB_STATIC
|
||||
#ifdef __GNUC__
|
||||
#define LLRB_STATIC __attribute__((__unused__)) static
|
||||
#else
|
||||
#define LLRB_STATIC static
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#define LLRB_HEAD(name, type) \
|
||||
struct name { struct type *rbh_root; }
|
||||
|
||||
#define LLRB_INITIALIZER(root) { 0 }
|
||||
|
||||
#define LLRB_INIT(root) do { (root)->rbh_root = 0; } while (0)
|
||||
|
||||
#define LLRB_BLACK 0
|
||||
#define LLRB_RED 1
|
||||
|
||||
#define LLRB_ENTRY(type) \
|
||||
struct { struct type *rbe_left, *rbe_right, *rbe_parent; _Bool rbe_color; }
|
||||
|
||||
#define LLRB_LEFT(elm, field) (elm)->field.rbe_left
|
||||
#define LLRB_RIGHT(elm, field) (elm)->field.rbe_right
|
||||
#define LLRB_PARENT(elm, field) (elm)->field.rbe_parent
|
||||
#define LLRB_EDGE(head, elm, field) (((elm) == LLRB_ROOT(head))? &LLRB_ROOT(head) : ((elm) == LLRB_LEFT(LLRB_PARENT((elm), field), field))? &LLRB_LEFT(LLRB_PARENT((elm), field), field) : &LLRB_RIGHT(LLRB_PARENT((elm), field), field))
|
||||
#define LLRB_COLOR(elm, field) (elm)->field.rbe_color
|
||||
#define LLRB_ROOT(head) (head)->rbh_root
|
||||
#define LLRB_EMPTY(head) ((head)->rbh_root == 0)
|
||||
#define LLRB_ISRED(elm, field) ((elm) && LLRB_COLOR((elm), field) == LLRB_RED)
|
||||
|
||||
#define LLRB_PROTOTYPE(name, type, field, cmp) \
|
||||
LLRB_PROTOTYPE_INTERNAL(name, type, field, cmp,)
|
||||
#define LLRB_PROTOTYPE_STATIC(name, type, field, cmp) \
|
||||
LLRB_PROTOTYPE_INTERNAL(name, type, field, cmp, LLRB_STATIC)
|
||||
#define LLRB_PROTOTYPE_INTERNAL(name, type, field, cmp, attr) \
|
||||
attr struct type *name##_LLRB_INSERT(struct name *, struct type *); \
|
||||
attr struct type *name##_LLRB_DELETE(struct name *, struct type *); \
|
||||
attr struct type *name##_LLRB_FIND(struct name *, struct type *); \
|
||||
attr struct type *name##_LLRB_MIN(struct type *); \
|
||||
attr struct type *name##_LLRB_MAX(struct type *); \
|
||||
attr struct type *name##_LLRB_NEXT(struct type *);
|
||||
|
||||
#define LLRB_GENERATE(name, type, field, cmp) \
|
||||
LLRB_GENERATE_INTERNAL(name, type, field, cmp,)
|
||||
#define LLRB_GENERATE_STATIC(name, type, field, cmp) \
|
||||
LLRB_GENERATE_INTERNAL(name, type, field, cmp, LLRB_STATIC)
|
||||
#define LLRB_GENERATE_INTERNAL(name, type, field, cmp, attr) \
|
||||
static inline void name##_LLRB_ROTL(struct type **pivot) { \
|
||||
struct type *a = *pivot; \
|
||||
struct type *b = LLRB_RIGHT(a, field); \
|
||||
if ((LLRB_RIGHT(a, field) = LLRB_LEFT(b, field))) \
|
||||
LLRB_PARENT(LLRB_RIGHT(a, field), field) = a; \
|
||||
LLRB_LEFT(b, field) = a; \
|
||||
LLRB_COLOR(b, field) = LLRB_COLOR(a, field); \
|
||||
LLRB_COLOR(a, field) = LLRB_RED; \
|
||||
LLRB_PARENT(b, field) = LLRB_PARENT(a, field); \
|
||||
LLRB_PARENT(a, field) = b; \
|
||||
*pivot = b; \
|
||||
} \
|
||||
static inline void name##_LLRB_ROTR(struct type **pivot) { \
|
||||
struct type *b = *pivot; \
|
||||
struct type *a = LLRB_LEFT(b, field); \
|
||||
if ((LLRB_LEFT(b, field) = LLRB_RIGHT(a, field))) \
|
||||
LLRB_PARENT(LLRB_LEFT(b, field), field) = b; \
|
||||
LLRB_RIGHT(a, field) = b; \
|
||||
LLRB_COLOR(a, field) = LLRB_COLOR(b, field); \
|
||||
LLRB_COLOR(b, field) = LLRB_RED; \
|
||||
LLRB_PARENT(a, field) = LLRB_PARENT(b, field); \
|
||||
LLRB_PARENT(b, field) = a; \
|
||||
*pivot = a; \
|
||||
} \
|
||||
static inline void name##_LLRB_FLIP(struct type *root) { \
|
||||
LLRB_COLOR(root, field) = !LLRB_COLOR(root, field); \
|
||||
LLRB_COLOR(LLRB_LEFT(root, field), field) = !LLRB_COLOR(LLRB_LEFT(root, field), field); \
|
||||
LLRB_COLOR(LLRB_RIGHT(root, field), field) = !LLRB_COLOR(LLRB_RIGHT(root, field), field); \
|
||||
} \
|
||||
static inline void name##_LLRB_FIXUP(struct type **root) { \
|
||||
if (LLRB_ISRED(LLRB_RIGHT(*root, field), field) && !LLRB_ISRED(LLRB_LEFT(*root, field), field)) \
|
||||
name##_LLRB_ROTL(root); \
|
||||
if (LLRB_ISRED(LLRB_LEFT(*root, field), field) && LLRB_ISRED(LLRB_LEFT(LLRB_LEFT(*root, field), field), field)) \
|
||||
name##_LLRB_ROTR(root); \
|
||||
if (LLRB_ISRED(LLRB_LEFT(*root, field), field) && LLRB_ISRED(LLRB_RIGHT(*root, field), field)) \
|
||||
name##_LLRB_FLIP(*root); \
|
||||
} \
|
||||
attr struct type *name##_LLRB_INSERT(struct name *head, struct type *elm) { \
|
||||
struct type **root = &LLRB_ROOT(head); \
|
||||
struct type *parent = 0; \
|
||||
while (*root) { \
|
||||
int comp = (cmp)((elm), (*root)); \
|
||||
parent = *root; \
|
||||
if (comp < 0) \
|
||||
root = &LLRB_LEFT(*root, field); \
|
||||
else if (comp > 0) \
|
||||
root = &LLRB_RIGHT(*root, field); \
|
||||
else \
|
||||
return *root; \
|
||||
} \
|
||||
LLRB_LEFT((elm), field) = 0; \
|
||||
LLRB_RIGHT((elm), field) = 0; \
|
||||
LLRB_COLOR((elm), field) = LLRB_RED; \
|
||||
LLRB_PARENT((elm), field) = parent; \
|
||||
*root = (elm); \
|
||||
while (parent && (LLRB_ISRED(LLRB_LEFT(parent, field), field) || LLRB_ISRED(LLRB_RIGHT(parent, field), field))) { \
|
||||
root = LLRB_EDGE(head, parent, field); \
|
||||
parent = LLRB_PARENT(parent, field); \
|
||||
name##_LLRB_FIXUP(root); \
|
||||
} \
|
||||
LLRB_COLOR(LLRB_ROOT(head), field) = LLRB_BLACK; \
|
||||
return 0; \
|
||||
} \
|
||||
static inline void name##_LLRB_MOVL(struct type **pivot) { \
|
||||
name##_LLRB_FLIP(*pivot); \
|
||||
if (LLRB_ISRED(LLRB_LEFT(LLRB_RIGHT(*pivot, field), field), field)) { \
|
||||
name##_LLRB_ROTR(&LLRB_RIGHT(*pivot, field)); \
|
||||
name##_LLRB_ROTL(pivot); \
|
||||
name##_LLRB_FLIP(*pivot); \
|
||||
} \
|
||||
} \
|
||||
static inline void name##_LLRB_MOVR(struct type **pivot) { \
|
||||
name##_LLRB_FLIP(*pivot); \
|
||||
if (LLRB_ISRED(LLRB_LEFT(LLRB_LEFT(*pivot, field), field), field)) { \
|
||||
name##_LLRB_ROTR(pivot); \
|
||||
name##_LLRB_FLIP(*pivot); \
|
||||
} \
|
||||
} \
|
||||
static inline struct type *name##_DELETEMIN(struct name *head, struct type **root) { \
|
||||
struct type **pivot = root, *deleted, *parent; \
|
||||
while (LLRB_LEFT(*pivot, field)) { \
|
||||
if (!LLRB_ISRED(LLRB_LEFT(*pivot, field), field) && !LLRB_ISRED(LLRB_LEFT(LLRB_LEFT(*pivot, field), field), field)) \
|
||||
name##_LLRB_MOVL(pivot); \
|
||||
pivot = &LLRB_LEFT(*pivot, field); \
|
||||
} \
|
||||
deleted = *pivot; \
|
||||
parent = LLRB_PARENT(*pivot, field); \
|
||||
*pivot = 0; \
|
||||
while (root != pivot) { \
|
||||
pivot = LLRB_EDGE(head, parent, field); \
|
||||
parent = LLRB_PARENT(parent, field); \
|
||||
name##_LLRB_FIXUP(pivot); \
|
||||
} \
|
||||
return deleted; \
|
||||
} \
|
||||
attr struct type *name##_LLRB_DELETE(struct name *head, struct type *elm) { \
|
||||
struct type **root = &LLRB_ROOT(head), *parent = 0, *deleted = 0; \
|
||||
int comp; \
|
||||
while (*root) { \
|
||||
parent = LLRB_PARENT(*root, field); \
|
||||
comp = (cmp)(elm, *root); \
|
||||
if (comp < 0) { \
|
||||
if (LLRB_LEFT(*root, field) && !LLRB_ISRED(LLRB_LEFT(*root, field), field) && !LLRB_ISRED(LLRB_LEFT(LLRB_LEFT(*root, field), field), field)) \
|
||||
name##_LLRB_MOVL(root); \
|
||||
root = &LLRB_LEFT(*root, field); \
|
||||
} else { \
|
||||
if (LLRB_ISRED(LLRB_LEFT(*root, field), field)) { \
|
||||
name##_LLRB_ROTR(root); \
|
||||
comp = (cmp)(elm, *root); \
|
||||
} \
|
||||
if (!comp && !LLRB_RIGHT(*root, field)) { \
|
||||
deleted = *root; \
|
||||
*root = 0; \
|
||||
break; \
|
||||
} \
|
||||
if (LLRB_RIGHT(*root, field) && !LLRB_ISRED(LLRB_RIGHT(*root, field), field) && !LLRB_ISRED(LLRB_LEFT(LLRB_RIGHT(*root, field), field), field)) { \
|
||||
name##_LLRB_MOVR(root); \
|
||||
comp = (cmp)(elm, *root); \
|
||||
} \
|
||||
if (!comp) { \
|
||||
struct type *orphan = name##_DELETEMIN(head, &LLRB_RIGHT(*root, field)); \
|
||||
LLRB_COLOR(orphan, field) = LLRB_COLOR(*root, field); \
|
||||
LLRB_PARENT(orphan, field) = LLRB_PARENT(*root, field); \
|
||||
if ((LLRB_RIGHT(orphan, field) = LLRB_RIGHT(*root, field))) \
|
||||
LLRB_PARENT(LLRB_RIGHT(orphan, field), field) = orphan; \
|
||||
if ((LLRB_LEFT(orphan, field) = LLRB_LEFT(*root, field))) \
|
||||
LLRB_PARENT(LLRB_LEFT(orphan, field), field) = orphan; \
|
||||
deleted = *root; \
|
||||
*root = orphan; \
|
||||
parent = *root; \
|
||||
break; \
|
||||
} else \
|
||||
root = &LLRB_RIGHT(*root, field); \
|
||||
} \
|
||||
} \
|
||||
while (parent) { \
|
||||
root = LLRB_EDGE(head, parent, field); \
|
||||
parent = LLRB_PARENT(parent, field); \
|
||||
name##_LLRB_FIXUP(root); \
|
||||
} \
|
||||
if (LLRB_ROOT(head)) \
|
||||
LLRB_COLOR(LLRB_ROOT(head), field) = LLRB_BLACK; \
|
||||
return deleted; \
|
||||
} \
|
||||
attr struct type *name##_LLRB_FIND(struct name *head, struct type *key) { \
|
||||
struct type *elm = LLRB_ROOT(head); \
|
||||
while (elm) { \
|
||||
int comp = (cmp)(key, elm); \
|
||||
if (comp < 0) \
|
||||
elm = LLRB_LEFT(elm, field); \
|
||||
else if (comp > 0) \
|
||||
elm = LLRB_RIGHT(elm, field); \
|
||||
else \
|
||||
return elm; \
|
||||
} \
|
||||
return 0; \
|
||||
} \
|
||||
attr struct type *name##_LLRB_MIN(struct type *elm) { \
|
||||
while (elm && LLRB_LEFT(elm, field)) \
|
||||
elm = LLRB_LEFT(elm, field); \
|
||||
return elm; \
|
||||
} \
|
||||
attr struct type *name##_LLRB_MAX(struct type *elm) { \
|
||||
while (elm && LLRB_RIGHT(elm, field)) \
|
||||
elm = LLRB_RIGHT(elm, field); \
|
||||
return elm; \
|
||||
} \
|
||||
attr struct type *name##_LLRB_NEXT(struct type *elm) { \
|
||||
if (LLRB_RIGHT(elm, field)) { \
|
||||
return name##_LLRB_MIN(LLRB_RIGHT(elm, field)); \
|
||||
} else if (LLRB_PARENT(elm, field)) { \
|
||||
if (elm == LLRB_LEFT(LLRB_PARENT(elm, field), field)) \
|
||||
return LLRB_PARENT(elm, field); \
|
||||
while (LLRB_PARENT(elm, field) && elm == LLRB_RIGHT(LLRB_PARENT(elm, field), field)) \
|
||||
elm = LLRB_PARENT(elm, field); \
|
||||
return LLRB_PARENT(elm, field); \
|
||||
} else return 0; \
|
||||
}
|
||||
|
||||
#define LLRB_INSERT(name, head, elm) name##_LLRB_INSERT((head), (elm))
|
||||
#define LLRB_DELETE(name, head, elm) name##_LLRB_DELETE((head), (elm))
|
||||
#define LLRB_REMOVE(name, head, elm) name##_LLRB_DELETE((head), (elm))
|
||||
#define LLRB_FIND(name, head, elm) name##_LLRB_FIND((head), (elm))
|
||||
#define LLRB_MIN(name, head) name##_LLRB_MIN(LLRB_ROOT((head)))
|
||||
#define LLRB_MAX(name, head) name##_LLRB_MAX(LLRB_ROOT((head)))
|
||||
#define LLRB_NEXT(name, head, elm) name##_LLRB_NEXT((elm))
|
||||
|
||||
#define LLRB_FOREACH(elm, name, head) \
|
||||
for ((elm) = LLRB_MIN(name, head); (elm); (elm) = name##_LLRB_NEXT((elm)))
|
||||
|
||||
#endif /* LLRB_H */
|
||||
|
||||
|
||||
#include <stdlib.h>
|
||||
|
||||
#include "timeout.h"
|
||||
#include "bench.h"
|
||||
|
||||
|
||||
struct rbtimeout {
|
||||
timeout_t expires;
|
||||
|
||||
int pending;
|
||||
|
||||
LLRB_ENTRY(rbtimeout) rbe;
|
||||
};
|
||||
|
||||
struct rbtimeouts {
|
||||
timeout_t curtime;
|
||||
LLRB_HEAD(tree, rbtimeout) tree;
|
||||
};
|
||||
|
||||
|
||||
static int timeoutcmp(struct rbtimeout *a, struct rbtimeout *b) {
|
||||
if (a->expires < b->expires) {
|
||||
return -1;
|
||||
} else if (a->expires > b->expires) {
|
||||
return 1;
|
||||
} else if (a < b) {
|
||||
return -1;
|
||||
} else if (a > b) {
|
||||
return 1;
|
||||
} else {
|
||||
return 0;
|
||||
}
|
||||
} /* timeoutcmp() */
|
||||
|
||||
LLRB_GENERATE_STATIC(tree, rbtimeout, rbe, timeoutcmp)
|
||||
|
||||
static void *init(struct timeout *timeout, size_t count, int verbose) {
|
||||
struct rbtimeouts *T;
|
||||
size_t i;
|
||||
|
||||
T = malloc(sizeof *T);
|
||||
T->curtime = 0;
|
||||
LLRB_INIT(&T->tree);
|
||||
|
||||
for (i = 0; i < count; i++) {
|
||||
struct rbtimeout *to = (void *)&timeout[i];
|
||||
to->expires = 0;
|
||||
to->pending = 0;
|
||||
}
|
||||
|
||||
return T;
|
||||
} /* init() */
|
||||
|
||||
|
||||
static void add(void *ctx, struct timeout *_to, timeout_t expires) {
|
||||
struct rbtimeouts *T = ctx;
|
||||
struct rbtimeout *to = (void *)_to;
|
||||
|
||||
if (to->pending)
|
||||
LLRB_REMOVE(tree, &T->tree, to);
|
||||
|
||||
to->expires = T->curtime + expires;
|
||||
LLRB_INSERT(tree, &T->tree, to);
|
||||
to->pending = 1;
|
||||
} /* add() */
|
||||
|
||||
|
||||
static void del(void *ctx, struct timeout *_to) {
|
||||
struct rbtimeouts *T = ctx;
|
||||
struct rbtimeout *to = (void *)_to;
|
||||
|
||||
LLRB_REMOVE(tree, &T->tree, to);
|
||||
to->pending = 0;
|
||||
to->expires = 0;
|
||||
} /* del() */
|
||||
|
||||
|
||||
static struct timeout *get(void *ctx) {
|
||||
struct rbtimeouts *T = ctx;
|
||||
struct rbtimeout *to;
|
||||
|
||||
if ((to = LLRB_MIN(tree, &T->tree)) && to->expires <= T->curtime) {
|
||||
LLRB_REMOVE(tree, &T->tree, to);
|
||||
to->pending = 0;
|
||||
to->expires = 0;
|
||||
|
||||
return (void *)to;
|
||||
}
|
||||
|
||||
return NULL;
|
||||
} /* get() */
|
||||
|
||||
|
||||
static void update(void *ctx, timeout_t ts) {
|
||||
struct rbtimeouts *T = ctx;
|
||||
T->curtime = ts;
|
||||
} /* update() */
|
||||
|
||||
|
||||
static void check(void *ctx) {
|
||||
return;
|
||||
} /* check() */
|
||||
|
||||
|
||||
static int empty(void *ctx) {
|
||||
struct rbtimeouts *T = ctx;
|
||||
|
||||
return LLRB_EMPTY(&T->tree);
|
||||
} /* empty() */
|
||||
|
||||
|
||||
static void destroy(void *ctx) {
|
||||
free(ctx);
|
||||
return;
|
||||
} /* destroy() */
|
||||
|
||||
|
||||
const struct benchops benchops = {
|
||||
.init = &init,
|
||||
.add = &add,
|
||||
.del = &del,
|
||||
.get = &get,
|
||||
.update = &update,
|
||||
.check = &check,
|
||||
.empty = &empty,
|
||||
.destroy = &destroy,
|
||||
};
|
||||
|
81
src/ext/timeouts/bench/bench-wheel.c
Normal file
81
src/ext/timeouts/bench/bench-wheel.c
Normal file
@ -0,0 +1,81 @@
|
||||
#include <stdlib.h>
|
||||
|
||||
#define TIMEOUT_PUBLIC static
|
||||
|
||||
#include "timeout.h"
|
||||
#include "timeout.c"
|
||||
#include "bench.h"
|
||||
|
||||
|
||||
static void *init(struct timeout *timeout, size_t count, int verbose) {
|
||||
struct timeouts *T;
|
||||
size_t i;
|
||||
int error;
|
||||
|
||||
T = timeouts_open(TIMEOUT_mHZ, &error);
|
||||
|
||||
for (i = 0; i < count; i++) {
|
||||
timeout_init(&timeout[i], 0);
|
||||
}
|
||||
|
||||
#if TIMEOUT_DEBUG - 0
|
||||
timeout_debug = verbose;
|
||||
#endif
|
||||
|
||||
return T;
|
||||
} /* init() */
|
||||
|
||||
|
||||
static void add(void *T, struct timeout *to, timeout_t expires) {
|
||||
timeouts_add(T, to, expires);
|
||||
} /* add() */
|
||||
|
||||
|
||||
static void del(void *T, struct timeout *to) {
|
||||
timeouts_del(T, to);
|
||||
} /* del() */
|
||||
|
||||
|
||||
static struct timeout *get(void *T) {
|
||||
return timeouts_get(T);
|
||||
} /* get() */
|
||||
|
||||
|
||||
static void update(void *T, timeout_t ts) {
|
||||
timeouts_update(T, ts);
|
||||
} /* update() */
|
||||
|
||||
|
||||
static void (check)(void *T) {
|
||||
if (!timeouts_check(T, stderr))
|
||||
_Exit(1);
|
||||
} /* check() */
|
||||
|
||||
|
||||
static int empty(void *T) {
|
||||
return !(timeouts_pending(T) || timeouts_expired(T));
|
||||
} /* empty() */
|
||||
|
||||
|
||||
static struct timeout *next(void *T, struct timeouts_it *it) {
|
||||
return timeouts_next(T, it);
|
||||
} /* next() */
|
||||
|
||||
|
||||
static void destroy(void *T) {
|
||||
timeouts_close(T);
|
||||
} /* destroy() */
|
||||
|
||||
|
||||
const struct benchops benchops = {
|
||||
.init = &init,
|
||||
.add = &add,
|
||||
.del = &del,
|
||||
.get = &get,
|
||||
.update = &update,
|
||||
.check = &check,
|
||||
.empty = &empty,
|
||||
.next = &next,
|
||||
.destroy = &destroy
|
||||
};
|
||||
|
293
src/ext/timeouts/bench/bench.c
Normal file
293
src/ext/timeouts/bench/bench.c
Normal file
@ -0,0 +1,293 @@
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <time.h>
|
||||
#include <errno.h>
|
||||
#include <unistd.h>
|
||||
#include <dlfcn.h>
|
||||
|
||||
#if __APPLE__
|
||||
#include <mach/mach_time.h>
|
||||
#endif
|
||||
|
||||
#include <lua.h>
|
||||
#include <lualib.h>
|
||||
#include <lauxlib.h>
|
||||
|
||||
#include "timeout.h"
|
||||
#include "bench.h"
|
||||
|
||||
#if LUA_VERSION_NUM < 502
|
||||
static int lua_absindex(lua_State *L, int idx) {
|
||||
return (idx > 0 || idx <= LUA_REGISTRYINDEX)? idx : lua_gettop(L) + idx + 1;
|
||||
} /* lua_absindex() */
|
||||
|
||||
static void luaL_setfuncs(lua_State *L, const luaL_Reg *l, int nup) {
|
||||
int i, t = lua_absindex(L, -1 - nup);
|
||||
|
||||
for (; l->name; l++) {
|
||||
for (i = 0; i < nup; i++)
|
||||
lua_pushvalue(L, -nup);
|
||||
lua_pushcclosure(L, l->func, nup);
|
||||
lua_setfield(L, t, l->name);
|
||||
}
|
||||
|
||||
lua_pop(L, nup);
|
||||
} /* luaL_setfuncs() */
|
||||
|
||||
#define luaL_newlibtable(L, l) \
|
||||
lua_createtable(L, 0, (sizeof (l) / sizeof *(l)) - 1)
|
||||
|
||||
#define luaL_newlib(L, l) \
|
||||
(luaL_newlibtable((L), (l)), luaL_setfuncs((L), (l), 0))
|
||||
#endif
|
||||
|
||||
#ifndef MAX
|
||||
#define MAX(a, b) (((a) > (b))? (a) : (b))
|
||||
#endif
|
||||
|
||||
|
||||
struct bench {
|
||||
const char *path;
|
||||
void *solib;
|
||||
size_t count;
|
||||
timeout_t timeout_max;
|
||||
int verbose;
|
||||
|
||||
void *state;
|
||||
struct timeout *timeout;
|
||||
struct benchops ops;
|
||||
timeout_t curtime;
|
||||
}; /* struct bench */
|
||||
|
||||
|
||||
#if __APPLE__
|
||||
static mach_timebase_info_data_t timebase;
|
||||
#endif
|
||||
|
||||
|
||||
static int long long monotime(void) {
|
||||
#if __APPLE__
|
||||
unsigned long long abt;
|
||||
|
||||
abt = mach_absolute_time();
|
||||
abt = abt * timebase.numer / timebase.denom;
|
||||
|
||||
return abt / 1000LL;
|
||||
#else
|
||||
struct timespec ts;
|
||||
|
||||
clock_gettime(CLOCK_MONOTONIC, &ts);
|
||||
|
||||
return (ts.tv_sec * 1000000L) + (ts.tv_nsec / 1000L);
|
||||
#endif
|
||||
} /* monotime() */
|
||||
|
||||
|
||||
static int bench_clock(lua_State *L) {
|
||||
lua_pushnumber(L, (double)monotime() / 1000000L);
|
||||
|
||||
return 1;
|
||||
} /* bench_clock() */
|
||||
|
||||
|
||||
static int bench_new(lua_State *L) {
|
||||
const char *path = luaL_checkstring(L, 1);
|
||||
size_t count = luaL_optinteger(L, 2, 1000000);
|
||||
timeout_t timeout_max = luaL_optinteger(L, 3, 300 * 1000000L);
|
||||
int verbose = (lua_isnone(L, 4))? 0 : lua_toboolean(L, 4);
|
||||
struct bench *B;
|
||||
struct benchops *ops;
|
||||
|
||||
B = lua_newuserdata(L, sizeof *B);
|
||||
memset(B, 0, sizeof *B);
|
||||
|
||||
luaL_getmetatable(L, "BENCH*");
|
||||
lua_setmetatable(L, -2);
|
||||
|
||||
B->count = count;
|
||||
B->timeout_max = timeout_max;
|
||||
B->verbose = verbose;
|
||||
|
||||
if (!(B->timeout = calloc(count, sizeof *B->timeout)))
|
||||
return luaL_error(L, "%s", strerror(errno));
|
||||
|
||||
if (!(B->solib = dlopen(path, RTLD_NOW|RTLD_LOCAL)))
|
||||
return luaL_error(L, "%s: %s", path, dlerror());
|
||||
|
||||
if (!(ops = dlsym(B->solib, "benchops")))
|
||||
return luaL_error(L, "%s: %s", path, dlerror());
|
||||
|
||||
B->ops = *ops;
|
||||
B->state = B->ops.init(B->timeout, B->count, B->verbose);
|
||||
|
||||
return 1;
|
||||
} /* bench_new() */
|
||||
|
||||
|
||||
static int bench_add(lua_State *L) {
|
||||
struct bench *B = lua_touserdata(L, 1);
|
||||
unsigned i;
|
||||
timeout_t t;
|
||||
|
||||
i = (lua_isnoneornil(L, 2))? random() % B->count : (unsigned)luaL_checkinteger(L, 2);
|
||||
t = (lua_isnoneornil(L, 3))? random() % B->timeout_max : (unsigned)luaL_checkinteger(L, 3);
|
||||
|
||||
B->ops.add(B->state, &B->timeout[i], t);
|
||||
|
||||
return 0;
|
||||
} /* bench_add() */
|
||||
|
||||
|
||||
static int bench_del(lua_State *L) {
|
||||
struct bench *B = lua_touserdata(L, 1);
|
||||
size_t i = luaL_optinteger(L, 2, random() % B->count);
|
||||
size_t j = luaL_optinteger(L, 3, i);
|
||||
|
||||
while (i <= j && i < B->count) {
|
||||
B->ops.del(B->state, &B->timeout[i]);
|
||||
++i;
|
||||
}
|
||||
|
||||
return 0;
|
||||
} /* bench_del() */
|
||||
|
||||
|
||||
static int bench_fill(lua_State *L) {
|
||||
struct bench *B = lua_touserdata(L, 1);
|
||||
size_t count = luaL_optinteger(L, 2, B->count);
|
||||
long timeout_inc = luaL_optinteger(L, 3, -1), timeout_max = 0, timeout;
|
||||
size_t i;
|
||||
|
||||
if (timeout_inc < 0) {
|
||||
for (i = 0; i < count; i++) {
|
||||
timeout = random() % B->timeout_max;
|
||||
B->ops.add(B->state, &B->timeout[i], timeout);
|
||||
timeout_max = MAX(timeout, timeout_max);
|
||||
}
|
||||
} else {
|
||||
for (i = 0; i < count; i++) {
|
||||
timeout = timeout_inc + i;
|
||||
B->ops.add(B->state, &B->timeout[i], timeout_inc + i);
|
||||
timeout_max = MAX(timeout, timeout_max);
|
||||
}
|
||||
}
|
||||
|
||||
lua_pushinteger(L, (lua_Integer)count);
|
||||
lua_pushinteger(L, (lua_Integer)timeout_max);
|
||||
|
||||
return 2;
|
||||
} /* bench_fill() */
|
||||
|
||||
|
||||
static int bench_expire(lua_State *L) {
|
||||
struct bench *B = lua_touserdata(L, 1);
|
||||
unsigned count = luaL_optinteger(L, 2, B->count);
|
||||
unsigned step = luaL_optinteger(L, 3, 300000);
|
||||
size_t i = 0;
|
||||
|
||||
while (i < count && !B->ops.empty(B->state)) {
|
||||
B->curtime += step;
|
||||
B->ops.update(B->state, B->curtime);
|
||||
|
||||
while (B->ops.get(B->state))
|
||||
i++;
|
||||
}
|
||||
|
||||
lua_pushinteger(L, (lua_Integer)i);
|
||||
|
||||
return 1;
|
||||
} /* bench_expire() */
|
||||
|
||||
|
||||
static int bench_empty(lua_State *L) {
|
||||
struct bench *B = lua_touserdata(L, 1);
|
||||
|
||||
lua_pushboolean(L, B->ops.empty(B->state));
|
||||
|
||||
return 1;
|
||||
} /* bench_empty() */
|
||||
|
||||
|
||||
static int bench__next(lua_State *L) {
|
||||
struct bench *B = lua_touserdata(L, lua_upvalueindex(1));
|
||||
struct timeouts_it *it = lua_touserdata(L, lua_upvalueindex(2));
|
||||
struct timeout *to;
|
||||
|
||||
if (!B->ops.next || !(to = B->ops.next(B->state, it)))
|
||||
return 0;
|
||||
|
||||
lua_pushinteger(L, luaL_optinteger(L, 2, 0) + 1);
|
||||
|
||||
lua_newtable(L);
|
||||
lua_pushinteger(L, to->expires);
|
||||
lua_setfield(L, -2, "expires");
|
||||
|
||||
return 2;
|
||||
} /* bench__next() */
|
||||
|
||||
static int bench__pairs(lua_State *L) {
|
||||
struct timeouts_it *it;
|
||||
|
||||
lua_settop(L, 1);
|
||||
|
||||
it = lua_newuserdata(L, sizeof *it);
|
||||
TIMEOUTS_IT_INIT(it, TIMEOUTS_ALL);
|
||||
|
||||
lua_pushcclosure(L, &bench__next, 2);
|
||||
lua_pushvalue(L, 1);
|
||||
lua_pushinteger(L, 0);
|
||||
|
||||
return 3;
|
||||
} /* bench__pairs() */
|
||||
|
||||
|
||||
static int bench__gc(lua_State *L) {
|
||||
struct bench *B = lua_touserdata(L, 1);
|
||||
|
||||
if (B->state) {
|
||||
B->ops.destroy(B->state);
|
||||
B->state = NULL;
|
||||
}
|
||||
|
||||
return 0;
|
||||
} /* bench__gc() */
|
||||
|
||||
|
||||
static const luaL_Reg bench_methods[] = {
|
||||
{ "add", &bench_add },
|
||||
{ "del", &bench_del },
|
||||
{ "fill", &bench_fill },
|
||||
{ "expire", &bench_expire },
|
||||
{ "empty", &bench_empty },
|
||||
{ "close", &bench__gc },
|
||||
{ NULL, NULL }
|
||||
};
|
||||
|
||||
static const luaL_Reg bench_metatable[] = {
|
||||
{ "__pairs", &bench__pairs },
|
||||
{ "__gc", &bench__gc },
|
||||
{ NULL, NULL }
|
||||
};
|
||||
|
||||
static const luaL_Reg bench_globals[] = {
|
||||
{ "new", &bench_new },
|
||||
{ "clock", &bench_clock },
|
||||
{ NULL, NULL }
|
||||
};
|
||||
|
||||
int luaopen_bench(lua_State *L) {
|
||||
#if __APPLE__
|
||||
mach_timebase_info(&timebase);
|
||||
#endif
|
||||
|
||||
if (luaL_newmetatable(L, "BENCH*")) {
|
||||
luaL_setfuncs(L, bench_metatable, 0);
|
||||
luaL_newlib(L, bench_methods);
|
||||
lua_setfield(L, -2, "__index");
|
||||
}
|
||||
|
||||
luaL_newlib(L, bench_globals);
|
||||
|
||||
return 1;
|
||||
} /* luaopen_bench() */
|
||||
|
11
src/ext/timeouts/bench/bench.h
Normal file
11
src/ext/timeouts/bench/bench.h
Normal file
@ -0,0 +1,11 @@
|
||||
struct benchops {
|
||||
void *(*init)(struct timeout *, size_t, int);
|
||||
void (*add)(void *, struct timeout *, timeout_t);
|
||||
void (*del)(void *, struct timeout *);
|
||||
struct timeout *(*get)(void *);
|
||||
void (*update)(void *, timeout_t);
|
||||
void (*check)(void *);
|
||||
int (*empty)(void *);
|
||||
struct timeout *(*next)(void *, struct timeouts_it *);
|
||||
void (*destroy)(void *);
|
||||
}; /* struct benchops() */
|
19
src/ext/timeouts/bench/bench.plt
Normal file
19
src/ext/timeouts/bench/bench.plt
Normal file
@ -0,0 +1,19 @@
|
||||
set terminal postscript color
|
||||
|
||||
set key top left
|
||||
set xlabel "Number of timeouts"
|
||||
set ylabel "Time\n(microseconds)"
|
||||
#set logscale x
|
||||
|
||||
set title "Time spent installing timeouts" font ",20"
|
||||
plot 'heap-add.dat' using 1:($2*1000000) title "min-heap" with lines ls 1 lw 3 lc "red", \
|
||||
'wheel-add.dat' using 1:($2*1000000) title "hierarchical wheel" with lines ls 1 lw 3 lc "forest-green"
|
||||
|
||||
set title "Time spent deleting timeouts" font ",20"
|
||||
plot 'heap-del.dat' using 1:($2*1000000) title "min-heap" with lines ls 1 lw 3 lc "red", \
|
||||
'wheel-del.dat' using 1:($2*1000000) title "hierarchical wheel" with lines ls 1 lw 3 lc "forest-green"
|
||||
|
||||
set title "Time spent expiring timeouts\n(by iteratively updating clock ~1000 times)" font ",20"
|
||||
plot 'heap-expire.dat' using 1:($2*1000000) title "min-heap" with lines ls 1 lw 3 lc "red", \
|
||||
'wheel-expire.dat' using 1:($2*1000000) title "hierarchical wheel" with lines ls 1 lw 3 lc "forest-green"
|
||||
|
20
src/ext/timeouts/lua/Rules.mk
Normal file
20
src/ext/timeouts/lua/Rules.mk
Normal file
@ -0,0 +1,20 @@
|
||||
$(LUA_APIS:%=$(top_builddir)/lua/%/timeout.so): $(top_srcdir)/lua/timeout-lua.c $(top_srcdir)/timeout.h $(top_srcdir)/timeout.c
|
||||
mkdir -p $(@D)
|
||||
@$(SHRC); echo_cmd $(CC) -o $@ $(top_srcdir)/lua/timeout-lua.c -I$(top_srcdir) -DWHEEL_BIT=$(WHEEL_BIT) -DWHEEL_NUM=$(WHEEL_NUM) $(LUA53_CPPFLAGS) $(ALL_CPPFLAGS) $(ALL_CFLAGS) $(ALL_SOFLAGS) $(ALL_LDFLAGS) $(ALL_LIBS)
|
||||
|
||||
$(top_builddir)/lua/5.1/timeouts.so: $(top_builddir)/lua/5.1/timeout.so
|
||||
$(top_builddir)/lua/5.2/timeouts.so: $(top_builddir)/lua/5.2/timeout.so
|
||||
$(top_builddir)/lua/5.3/timeouts.so: $(top_builddir)/lua/5.3/timeout.so
|
||||
|
||||
$(LUA_APIS:%=$(top_builddir)/lua/%/timeouts.so):
|
||||
cd $(@D) && ln -fs timeout.so timeouts.so
|
||||
|
||||
lua-5.1: $(top_builddir)/lua/5.1/timeout.so $(top_builddir)/lua/5.1/timeouts.so
|
||||
lua-5.2: $(top_builddir)/lua/5.2/timeout.so $(top_builddir)/lua/5.2/timeouts.so
|
||||
lua-5.3: $(top_builddir)/lua/5.3/timeout.so $(top_builddir)/lua/5.3/timeouts.so
|
||||
|
||||
lua-clean:
|
||||
$(RM) -r $(top_builddir)/lua/5.?
|
||||
|
||||
clean: lua-clean
|
||||
|
396
src/ext/timeouts/lua/timeout-lua.c
Normal file
396
src/ext/timeouts/lua/timeout-lua.c
Normal file
@ -0,0 +1,396 @@
|
||||
#include <assert.h>
|
||||
#include <string.h>
|
||||
|
||||
#include <lua.h>
|
||||
#include <lualib.h>
|
||||
#include <lauxlib.h>
|
||||
|
||||
#if LUA_VERSION_NUM != 503
|
||||
#error only Lua 5.3 supported
|
||||
#endif
|
||||
|
||||
#define TIMEOUT_PUBLIC static
|
||||
#include "timeout.h"
|
||||
#include "timeout.c"
|
||||
|
||||
#define TIMEOUT_METANAME "struct timeout"
|
||||
#define TIMEOUTS_METANAME "struct timeouts*"
|
||||
|
||||
static struct timeout *
|
||||
to_checkudata(lua_State *L, int index)
|
||||
{
|
||||
return luaL_checkudata(L, index, TIMEOUT_METANAME);
|
||||
}
|
||||
|
||||
static struct timeouts *
|
||||
tos_checkudata(lua_State *L, int index)
|
||||
{
|
||||
return *(struct timeouts **)luaL_checkudata(L, index, TIMEOUTS_METANAME);
|
||||
}
|
||||
|
||||
static void
|
||||
tos_bind(lua_State *L, int tos_index, int to_index)
|
||||
{
|
||||
lua_getuservalue(L, tos_index);
|
||||
lua_pushlightuserdata(L, to_checkudata(L, to_index));
|
||||
lua_pushvalue(L, to_index);
|
||||
lua_rawset(L, -3);
|
||||
lua_pop(L, 1);
|
||||
}
|
||||
|
||||
static void
|
||||
tos_unbind(lua_State *L, int tos_index, int to_index)
|
||||
{
|
||||
lua_getuservalue(L, tos_index);
|
||||
lua_pushlightuserdata(L, to_checkudata(L, to_index));
|
||||
lua_pushnil(L);
|
||||
lua_rawset(L, -3);
|
||||
lua_pop(L, 1);
|
||||
}
|
||||
|
||||
static int
|
||||
to__index(lua_State *L)
|
||||
{
|
||||
struct timeout *to = to_checkudata(L, 1);
|
||||
|
||||
if (lua_type(L, 2 == LUA_TSTRING)) {
|
||||
const char *key = lua_tostring(L, 2);
|
||||
|
||||
if (!strcmp(key, "flags")) {
|
||||
lua_pushinteger(L, to->flags);
|
||||
|
||||
return 1;
|
||||
} else if (!strcmp(key, "expires")) {
|
||||
lua_pushinteger(L, to->expires);
|
||||
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
if (LUA_TNIL != lua_getuservalue(L, 1)) {
|
||||
lua_pushvalue(L, 2);
|
||||
if (LUA_TNIL != lua_rawget(L, -2))
|
||||
return 1;
|
||||
}
|
||||
|
||||
lua_pushvalue(L, 2);
|
||||
if (LUA_TNIL != lua_rawget(L, lua_upvalueindex(1)))
|
||||
return 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
to__newindex(lua_State *L)
|
||||
{
|
||||
if (LUA_TNIL == lua_getuservalue(L, 1)) {
|
||||
lua_newtable(L);
|
||||
lua_pushvalue(L, -1);
|
||||
lua_setuservalue(L, 1);
|
||||
}
|
||||
|
||||
lua_pushvalue(L, 2);
|
||||
lua_pushvalue(L, 3);
|
||||
lua_rawset(L, -3);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
to__gc(lua_State *L)
|
||||
{
|
||||
struct timeout *to = to_checkudata(L, 1);
|
||||
|
||||
/*
|
||||
* NB: On script exit it's possible for a timeout to still be
|
||||
* associated with a timeouts object, particularly when the timeouts
|
||||
* object was created first.
|
||||
*/
|
||||
timeout_del(to);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
to_new(lua_State *L)
|
||||
{
|
||||
int flags = luaL_optinteger(L, 1, 0);
|
||||
struct timeout *to;
|
||||
|
||||
to = lua_newuserdata(L, sizeof *to);
|
||||
timeout_init(to, flags);
|
||||
luaL_setmetatable(L, TIMEOUT_METANAME);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static const luaL_Reg to_methods[] = {
|
||||
{ NULL, NULL },
|
||||
};
|
||||
|
||||
static const luaL_Reg to_metatable[] = {
|
||||
{ "__index", &to__index },
|
||||
{ "__newindex", &to__newindex },
|
||||
{ "__gc", &to__gc },
|
||||
{ NULL, NULL },
|
||||
};
|
||||
|
||||
static const luaL_Reg to_globals[] = {
|
||||
{ "new", &to_new },
|
||||
{ NULL, NULL },
|
||||
};
|
||||
|
||||
static void
|
||||
to_newmetatable(lua_State *L)
|
||||
{
|
||||
if (luaL_newmetatable(L, TIMEOUT_METANAME)) {
|
||||
/*
|
||||
* fill metamethod table, capturing the methods table as an
|
||||
* upvalue for use by __index metamethod
|
||||
*/
|
||||
luaL_newlib(L, to_methods);
|
||||
luaL_setfuncs(L, to_metatable, 1);
|
||||
}
|
||||
}
|
||||
|
||||
int
|
||||
luaopen_timeout(lua_State *L)
|
||||
{
|
||||
to_newmetatable(L);
|
||||
|
||||
luaL_newlib(L, to_globals);
|
||||
lua_pushinteger(L, TIMEOUT_INT);
|
||||
lua_setfield(L, -2, "INT");
|
||||
lua_pushinteger(L, TIMEOUT_ABS);
|
||||
lua_setfield(L, -2, "ABS");
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_update(lua_State *L)
|
||||
{
|
||||
struct timeouts *T = tos_checkudata(L, 1);
|
||||
lua_Number n = luaL_checknumber(L, 2);
|
||||
|
||||
timeouts_update(T, timeouts_f2i(T, n));
|
||||
|
||||
lua_pushvalue(L, 1);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_step(lua_State *L)
|
||||
{
|
||||
struct timeouts *T = tos_checkudata(L, 1);
|
||||
lua_Number n = luaL_checknumber(L, 2);
|
||||
|
||||
timeouts_step(T, timeouts_f2i(T, n));
|
||||
|
||||
lua_pushvalue(L, 1);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_timeout(lua_State *L)
|
||||
{
|
||||
struct timeouts *T = tos_checkudata(L, 1);
|
||||
|
||||
lua_pushnumber(L, timeouts_i2f(T, timeouts_timeout(T)));
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_add(lua_State *L)
|
||||
{
|
||||
struct timeouts *T = tos_checkudata(L, 1);
|
||||
struct timeout *to = to_checkudata(L, 2);
|
||||
lua_Number timeout = luaL_checknumber(L, 3);
|
||||
|
||||
tos_bind(L, 1, 2);
|
||||
timeouts_addf(T, to, timeout);
|
||||
|
||||
return lua_pushvalue(L, 1), 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_del(lua_State *L)
|
||||
{
|
||||
struct timeouts *T = tos_checkudata(L, 1);
|
||||
struct timeout *to = to_checkudata(L, 2);
|
||||
|
||||
timeouts_del(T, to);
|
||||
tos_unbind(L, 1, 2);
|
||||
|
||||
return lua_pushvalue(L, 1), 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_get(lua_State *L)
|
||||
{
|
||||
struct timeouts *T = tos_checkudata(L, 1);
|
||||
struct timeout *to;
|
||||
|
||||
if (!(to = timeouts_get(T)))
|
||||
return 0;
|
||||
|
||||
lua_getuservalue(L, 1);
|
||||
lua_rawgetp(L, -1, to);
|
||||
|
||||
if (!timeout_pending(to))
|
||||
tos_unbind(L, 1, lua_absindex(L, -1));
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_pending(lua_State *L)
|
||||
{
|
||||
struct timeouts *T = tos_checkudata(L, 1);
|
||||
|
||||
lua_pushboolean(L, timeouts_pending(T));
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_expired(lua_State *L)
|
||||
{
|
||||
struct timeouts *T = tos_checkudata(L, 1);
|
||||
|
||||
lua_pushboolean(L, timeouts_expired(T));
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_check(lua_State *L)
|
||||
{
|
||||
struct timeouts *T = tos_checkudata(L, 1);
|
||||
|
||||
lua_pushboolean(L, timeouts_check(T, NULL));
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos__next(lua_State *L)
|
||||
{
|
||||
struct timeouts *T = tos_checkudata(L, lua_upvalueindex(1));
|
||||
struct timeouts_it *it = lua_touserdata(L, lua_upvalueindex(2));
|
||||
struct timeout *to;
|
||||
|
||||
if (!(to = timeouts_next(T, it)))
|
||||
return 0;
|
||||
|
||||
lua_getuservalue(L, lua_upvalueindex(1));
|
||||
lua_rawgetp(L, -1, to);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_timeouts(lua_State *L)
|
||||
{
|
||||
int flags = luaL_checkinteger(L, 2);
|
||||
struct timeouts_it *it;
|
||||
|
||||
tos_checkudata(L, 1);
|
||||
lua_pushvalue(L, 1);
|
||||
it = lua_newuserdata(L, sizeof *it);
|
||||
TIMEOUTS_IT_INIT(it, flags);
|
||||
lua_pushcclosure(L, &tos__next, 2);
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int
|
||||
tos__gc(lua_State *L)
|
||||
{
|
||||
struct timeouts **tos = luaL_checkudata(L, 1, TIMEOUTS_METANAME);
|
||||
struct timeout *to;
|
||||
|
||||
TIMEOUTS_FOREACH(to, *tos, TIMEOUTS_ALL) {
|
||||
timeouts_del(*tos, to);
|
||||
}
|
||||
|
||||
timeouts_close(*tos);
|
||||
*tos = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
tos_new(lua_State *L)
|
||||
{
|
||||
timeout_t hz = luaL_optinteger(L, 1, 0);
|
||||
struct timeouts **T;
|
||||
int error;
|
||||
|
||||
T = lua_newuserdata(L, sizeof *T);
|
||||
luaL_setmetatable(L, TIMEOUTS_METANAME);
|
||||
|
||||
lua_newtable(L);
|
||||
lua_setuservalue(L, -2);
|
||||
|
||||
if (!(*T = timeouts_open(hz, &error)))
|
||||
return luaL_error(L, "%s", strerror(error));
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static const luaL_Reg tos_methods[] = {
|
||||
{ "update", &tos_update },
|
||||
{ "step", &tos_step },
|
||||
{ "timeout", &tos_timeout },
|
||||
{ "add", &tos_add },
|
||||
{ "del", &tos_del },
|
||||
{ "get", &tos_get },
|
||||
{ "pending", &tos_pending },
|
||||
{ "expired", &tos_expired },
|
||||
{ "check", &tos_check },
|
||||
{ "timeouts", &tos_timeouts },
|
||||
{ NULL, NULL },
|
||||
};
|
||||
|
||||
static const luaL_Reg tos_metatable[] = {
|
||||
{ "__gc", &tos__gc },
|
||||
{ NULL, NULL },
|
||||
};
|
||||
|
||||
static const luaL_Reg tos_globals[] = {
|
||||
{ "new", &tos_new },
|
||||
{ NULL, NULL },
|
||||
};
|
||||
|
||||
static void
|
||||
tos_newmetatable(lua_State *L)
|
||||
{
|
||||
if (luaL_newmetatable(L, TIMEOUTS_METANAME)) {
|
||||
luaL_setfuncs(L, tos_metatable, 0);
|
||||
luaL_newlib(L, tos_methods);
|
||||
lua_setfield(L, -2, "__index");
|
||||
}
|
||||
}
|
||||
|
||||
int
|
||||
luaopen_timeouts(lua_State *L)
|
||||
{
|
||||
to_newmetatable(L);
|
||||
tos_newmetatable(L);
|
||||
|
||||
luaL_newlib(L, tos_globals);
|
||||
lua_pushinteger(L, TIMEOUTS_PENDING);
|
||||
lua_setfield(L, -2, "PENDING");
|
||||
lua_pushinteger(L, TIMEOUTS_EXPIRED);
|
||||
lua_setfield(L, -2, "EXPIRED");
|
||||
lua_pushinteger(L, TIMEOUTS_ALL);
|
||||
lua_setfield(L, -2, "ALL");
|
||||
lua_pushinteger(L, TIMEOUTS_CLEAR);
|
||||
lua_setfield(L, -2, "CLEAR");
|
||||
|
||||
return 1;
|
||||
}
|
530
src/ext/timeouts/test-timeout.c
Normal file
530
src/ext/timeouts/test-timeout.c
Normal file
@ -0,0 +1,530 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <assert.h>
|
||||
#include <limits.h>
|
||||
|
||||
#include "timeout.h"
|
||||
|
||||
#define THE_END_OF_TIME ((timeout_t)-1)
|
||||
|
||||
static int check_misc(void) {
|
||||
if (TIMEOUT_VERSION != timeout_version())
|
||||
return 1;
|
||||
if (TIMEOUT_V_REL != timeout_v_rel())
|
||||
return 1;
|
||||
if (TIMEOUT_V_API != timeout_v_api())
|
||||
return 1;
|
||||
if (TIMEOUT_V_ABI != timeout_v_abi())
|
||||
return 1;
|
||||
if (strcmp(timeout_vendor(), TIMEOUT_VENDOR))
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int check_open_close(timeout_t hz_set, timeout_t hz_expect) {
|
||||
int err=0;
|
||||
struct timeouts *tos = timeouts_open(hz_set, &err);
|
||||
if (!tos)
|
||||
return 1;
|
||||
if (err)
|
||||
return 1;
|
||||
if (hz_expect != timeouts_hz(tos))
|
||||
return 1;
|
||||
timeouts_close(tos);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Not very random */
|
||||
static timeout_t random_to(timeout_t min, timeout_t max)
|
||||
{
|
||||
if (max <= min)
|
||||
return min;
|
||||
/* Not actually all that random, but should exercise the code. */
|
||||
timeout_t rand64 = random() * (timeout_t)INT_MAX + random();
|
||||
return min + (rand64 % (max-min));
|
||||
}
|
||||
|
||||
/* configuration for check_randomized */
|
||||
struct rand_cfg {
|
||||
/* When creating timeouts, smallest possible delay */
|
||||
timeout_t min_timeout;
|
||||
/* When creating timeouts, largest possible delay */
|
||||
timeout_t max_timeout;
|
||||
/* First time to start the clock at. */
|
||||
timeout_t start_at;
|
||||
/* Do not advance the clock past this time. */
|
||||
timeout_t end_at;
|
||||
/* Number of timeouts to create and monitor. */
|
||||
int n_timeouts;
|
||||
/* Advance the clock by no more than this each step. */
|
||||
timeout_t max_step;
|
||||
/* Use relative timers and stepping */
|
||||
int relative;
|
||||
/* Every time the clock ticks, try removing this many timeouts at
|
||||
* random. */
|
||||
int try_removing;
|
||||
/* When we're done, advance the clock to the end of time. */
|
||||
int finalize;
|
||||
};
|
||||
|
||||
static int check_randomized(const struct rand_cfg *cfg)
|
||||
{
|
||||
#define FAIL() do { \
|
||||
printf("Failure on line %d\n", __LINE__); \
|
||||
goto done; \
|
||||
} while (0)
|
||||
|
||||
int i, err;
|
||||
int rv = 1;
|
||||
struct timeout *t = calloc(cfg->n_timeouts, sizeof(struct timeout));
|
||||
timeout_t *timeouts = calloc(cfg->n_timeouts, sizeof(timeout_t));
|
||||
uint8_t *fired = calloc(cfg->n_timeouts, sizeof(uint8_t));
|
||||
uint8_t *found = calloc(cfg->n_timeouts, sizeof(uint8_t));
|
||||
uint8_t *deleted = calloc(cfg->n_timeouts, sizeof(uint8_t));
|
||||
struct timeouts *tos = timeouts_open(0, &err);
|
||||
timeout_t now = cfg->start_at;
|
||||
int n_added_pending = 0, cnt_added_pending = 0;
|
||||
int n_added_expired = 0, cnt_added_expired = 0;
|
||||
struct timeouts_it it_p, it_e, it_all;
|
||||
int p_done = 0, e_done = 0, all_done = 0;
|
||||
struct timeout *to = NULL;
|
||||
const int rel = cfg->relative;
|
||||
|
||||
if (!t || !timeouts || !tos || !fired || !found || !deleted)
|
||||
FAIL();
|
||||
timeouts_update(tos, cfg->start_at);
|
||||
|
||||
for (i = 0; i < cfg->n_timeouts; ++i) {
|
||||
if (&t[i] != timeout_init(&t[i], rel ? 0 : TIMEOUT_ABS))
|
||||
FAIL();
|
||||
if (timeout_pending(&t[i]))
|
||||
FAIL();
|
||||
if (timeout_expired(&t[i]))
|
||||
FAIL();
|
||||
|
||||
timeouts[i] = random_to(cfg->min_timeout, cfg->max_timeout);
|
||||
|
||||
timeouts_add(tos, &t[i], timeouts[i] - (rel ? now : 0));
|
||||
if (timeouts[i] <= cfg->start_at) {
|
||||
if (timeout_pending(&t[i]))
|
||||
FAIL();
|
||||
if (! timeout_expired(&t[i]))
|
||||
FAIL();
|
||||
++n_added_expired;
|
||||
} else {
|
||||
if (! timeout_pending(&t[i]))
|
||||
FAIL();
|
||||
if (timeout_expired(&t[i]))
|
||||
FAIL();
|
||||
++n_added_pending;
|
||||
}
|
||||
}
|
||||
|
||||
if (!!n_added_pending != timeouts_pending(tos))
|
||||
FAIL();
|
||||
if (!!n_added_expired != timeouts_expired(tos))
|
||||
FAIL();
|
||||
|
||||
/* Test foreach, interleaving a few iterators. */
|
||||
TIMEOUTS_IT_INIT(&it_p, TIMEOUTS_PENDING);
|
||||
TIMEOUTS_IT_INIT(&it_e, TIMEOUTS_EXPIRED);
|
||||
TIMEOUTS_IT_INIT(&it_all, TIMEOUTS_ALL);
|
||||
while (! (p_done && e_done && all_done)) {
|
||||
if (!p_done) {
|
||||
to = timeouts_next(tos, &it_p);
|
||||
if (to) {
|
||||
i = to - &t[0];
|
||||
++found[i];
|
||||
++cnt_added_pending;
|
||||
} else {
|
||||
p_done = 1;
|
||||
}
|
||||
}
|
||||
if (!e_done) {
|
||||
to = timeouts_next(tos, &it_e);
|
||||
if (to) {
|
||||
i = to - &t[0];
|
||||
++found[i];
|
||||
++cnt_added_expired;
|
||||
} else {
|
||||
e_done = 1;
|
||||
}
|
||||
}
|
||||
if (!all_done) {
|
||||
to = timeouts_next(tos, &it_all);
|
||||
if (to) {
|
||||
i = to - &t[0];
|
||||
++found[i];
|
||||
} else {
|
||||
all_done = 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0; i < cfg->n_timeouts; ++i) {
|
||||
if (found[i] != 2)
|
||||
FAIL();
|
||||
}
|
||||
if (cnt_added_expired != n_added_expired)
|
||||
FAIL();
|
||||
if (cnt_added_pending != n_added_pending)
|
||||
FAIL();
|
||||
|
||||
while (NULL != (to = timeouts_get(tos))) {
|
||||
i = to - &t[0];
|
||||
assert(&t[i] == to);
|
||||
if (timeouts[i] > cfg->start_at)
|
||||
FAIL(); /* shouldn't have happened yet */
|
||||
|
||||
--n_added_expired; /* drop expired timeouts. */
|
||||
++fired[i];
|
||||
}
|
||||
|
||||
if (n_added_expired != 0)
|
||||
FAIL();
|
||||
|
||||
while (now < cfg->end_at) {
|
||||
int n_fired_this_time = 0;
|
||||
timeout_t first_at = timeouts_timeout(tos) + now;
|
||||
|
||||
timeout_t oldtime = now;
|
||||
timeout_t step = random_to(1, cfg->max_step);
|
||||
int another;
|
||||
now += step;
|
||||
if (rel)
|
||||
timeouts_step(tos, step);
|
||||
else
|
||||
timeouts_update(tos, now);
|
||||
|
||||
for (i = 0; i < cfg->try_removing; ++i) {
|
||||
int idx = random() % cfg->n_timeouts;
|
||||
if (! fired[idx]) {
|
||||
timeout_del(&t[idx]);
|
||||
++deleted[idx];
|
||||
}
|
||||
}
|
||||
|
||||
another = (timeouts_timeout(tos) == 0);
|
||||
|
||||
while (NULL != (to = timeouts_get(tos))) {
|
||||
if (! another)
|
||||
FAIL(); /* Thought we saw the last one! */
|
||||
i = to - &t[0];
|
||||
assert(&t[i] == to);
|
||||
if (timeouts[i] > now)
|
||||
FAIL(); /* shouldn't have happened yet */
|
||||
if (timeouts[i] <= oldtime)
|
||||
FAIL(); /* should have happened already */
|
||||
if (timeouts[i] < first_at)
|
||||
FAIL(); /* first_at should've been earlier */
|
||||
fired[i]++;
|
||||
n_fired_this_time++;
|
||||
another = (timeouts_timeout(tos) == 0);
|
||||
}
|
||||
if (n_fired_this_time && first_at > now)
|
||||
FAIL(); /* first_at should've been earlier */
|
||||
if (another)
|
||||
FAIL(); /* Huh? We think there are more? */
|
||||
if (!timeouts_check(tos, stderr))
|
||||
FAIL();
|
||||
}
|
||||
|
||||
for (i = 0; i < cfg->n_timeouts; ++i) {
|
||||
if (fired[i] > 1)
|
||||
FAIL(); /* Nothing fired twice. */
|
||||
if (timeouts[i] <= now) {
|
||||
if (!(fired[i] || deleted[i]))
|
||||
FAIL();
|
||||
} else {
|
||||
if (fired[i])
|
||||
FAIL();
|
||||
}
|
||||
if (fired[i] && deleted[i])
|
||||
FAIL();
|
||||
if (cfg->finalize > 1) {
|
||||
if (!fired[i])
|
||||
timeout_del(&t[i]);
|
||||
}
|
||||
}
|
||||
|
||||
/* Now nothing more should fire between now and the end of time. */
|
||||
if (cfg->finalize) {
|
||||
timeouts_update(tos, THE_END_OF_TIME);
|
||||
if (cfg->finalize > 1) {
|
||||
if (timeouts_get(tos))
|
||||
FAIL();
|
||||
TIMEOUTS_FOREACH(to, tos, TIMEOUTS_ALL)
|
||||
FAIL();
|
||||
}
|
||||
}
|
||||
rv = 0;
|
||||
|
||||
done:
|
||||
if (tos) timeouts_close(tos);
|
||||
if (t) free(t);
|
||||
if (timeouts) free(timeouts);
|
||||
if (fired) free(fired);
|
||||
if (found) free(found);
|
||||
if (deleted) free(deleted);
|
||||
return rv;
|
||||
}
|
||||
|
||||
struct intervals_cfg {
|
||||
const timeout_t *timeouts;
|
||||
int n_timeouts;
|
||||
timeout_t start_at;
|
||||
timeout_t end_at;
|
||||
timeout_t skip;
|
||||
};
|
||||
|
||||
int
|
||||
check_intervals(struct intervals_cfg *cfg)
|
||||
{
|
||||
int i, err;
|
||||
int rv = 1;
|
||||
struct timeout *to;
|
||||
struct timeout *t = calloc(cfg->n_timeouts, sizeof(struct timeout));
|
||||
unsigned *fired = calloc(cfg->n_timeouts, sizeof(unsigned));
|
||||
struct timeouts *tos = timeouts_open(0, &err);
|
||||
|
||||
timeout_t now = cfg->start_at;
|
||||
if (!t || !tos || !fired)
|
||||
FAIL();
|
||||
|
||||
timeouts_update(tos, now);
|
||||
|
||||
for (i = 0; i < cfg->n_timeouts; ++i) {
|
||||
if (&t[i] != timeout_init(&t[i], TIMEOUT_INT))
|
||||
FAIL();
|
||||
if (timeout_pending(&t[i]))
|
||||
FAIL();
|
||||
if (timeout_expired(&t[i]))
|
||||
FAIL();
|
||||
|
||||
timeouts_add(tos, &t[i], cfg->timeouts[i]);
|
||||
if (! timeout_pending(&t[i]))
|
||||
FAIL();
|
||||
if (timeout_expired(&t[i]))
|
||||
FAIL();
|
||||
}
|
||||
|
||||
while (now < cfg->end_at) {
|
||||
timeout_t delay = timeouts_timeout(tos);
|
||||
if (cfg->skip && delay < cfg->skip)
|
||||
delay = cfg->skip;
|
||||
timeouts_step(tos, delay);
|
||||
now += delay;
|
||||
|
||||
while (NULL != (to = timeouts_get(tos))) {
|
||||
i = to - &t[0];
|
||||
assert(&t[i] == to);
|
||||
fired[i]++;
|
||||
if (0 != (to->expires - cfg->start_at) % cfg->timeouts[i])
|
||||
FAIL();
|
||||
if (to->expires <= now)
|
||||
FAIL();
|
||||
if (to->expires > now + cfg->timeouts[i])
|
||||
FAIL();
|
||||
}
|
||||
if (!timeouts_check(tos, stderr))
|
||||
FAIL();
|
||||
}
|
||||
|
||||
timeout_t duration = now - cfg->start_at;
|
||||
for (i = 0; i < cfg->n_timeouts; ++i) {
|
||||
if (cfg->skip) {
|
||||
if (fired[i] > duration / cfg->timeouts[i])
|
||||
FAIL();
|
||||
} else {
|
||||
if (fired[i] != duration / cfg->timeouts[i])
|
||||
FAIL();
|
||||
}
|
||||
if (!timeout_pending(&t[i]))
|
||||
FAIL();
|
||||
}
|
||||
|
||||
rv = 0;
|
||||
done:
|
||||
if (t) free(t);
|
||||
if (fired) free(fired);
|
||||
if (tos) free(tos);
|
||||
return rv;
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
int j;
|
||||
int n_failed = 0;
|
||||
#define DO(fn) do { \
|
||||
printf("."); fflush(stdout); \
|
||||
if (fn) { \
|
||||
++n_failed; \
|
||||
printf("%s failed\n", #fn); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
#define DO_N(n, fn) do { \
|
||||
for (j = 0; j < (n); ++j) { \
|
||||
DO(fn); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
DO(check_misc());
|
||||
DO(check_open_close(1000, 1000));
|
||||
DO(check_open_close(0, TIMEOUT_mHZ));
|
||||
|
||||
struct rand_cfg cfg1 = {
|
||||
.min_timeout = 1,
|
||||
.max_timeout = 100,
|
||||
.start_at = 5,
|
||||
.end_at = 1000,
|
||||
.n_timeouts = 1000,
|
||||
.max_step = 10,
|
||||
.relative = 0,
|
||||
.try_removing = 0,
|
||||
.finalize = 2,
|
||||
};
|
||||
DO_N(300,check_randomized(&cfg1));
|
||||
|
||||
struct rand_cfg cfg2 = {
|
||||
.min_timeout = 20,
|
||||
.max_timeout = 1000,
|
||||
.start_at = 10,
|
||||
.end_at = 100,
|
||||
.n_timeouts = 1000,
|
||||
.max_step = 5,
|
||||
.relative = 1,
|
||||
.try_removing = 0,
|
||||
.finalize = 2,
|
||||
};
|
||||
DO_N(300,check_randomized(&cfg2));
|
||||
|
||||
struct rand_cfg cfg2b = {
|
||||
.min_timeout = 20,
|
||||
.max_timeout = 1000,
|
||||
.start_at = 10,
|
||||
.end_at = 100,
|
||||
.n_timeouts = 1000,
|
||||
.max_step = 5,
|
||||
.relative = 1,
|
||||
.try_removing = 0,
|
||||
.finalize = 1,
|
||||
};
|
||||
DO_N(300,check_randomized(&cfg2b));
|
||||
|
||||
struct rand_cfg cfg2c = {
|
||||
.min_timeout = 20,
|
||||
.max_timeout = 1000,
|
||||
.start_at = 10,
|
||||
.end_at = 100,
|
||||
.n_timeouts = 1000,
|
||||
.max_step = 5,
|
||||
.relative = 1,
|
||||
.try_removing = 0,
|
||||
.finalize = 0,
|
||||
};
|
||||
DO_N(300,check_randomized(&cfg2c));
|
||||
|
||||
struct rand_cfg cfg3 = {
|
||||
.min_timeout = 2000,
|
||||
.max_timeout = ((uint64_t)1) << 50,
|
||||
.start_at = 100,
|
||||
.end_at = ((uint64_t)1) << 49,
|
||||
.n_timeouts = 1000,
|
||||
.max_step = 1<<31,
|
||||
.relative = 0,
|
||||
.try_removing = 0,
|
||||
.finalize = 2,
|
||||
};
|
||||
DO_N(10,check_randomized(&cfg3));
|
||||
|
||||
struct rand_cfg cfg3b = {
|
||||
.min_timeout = ((uint64_t)1) << 50,
|
||||
.max_timeout = ((uint64_t)1) << 52,
|
||||
.start_at = 100,
|
||||
.end_at = ((uint64_t)1) << 53,
|
||||
.n_timeouts = 1000,
|
||||
.max_step = ((uint64_t)1)<<48,
|
||||
.relative = 0,
|
||||
.try_removing = 0,
|
||||
.finalize = 2,
|
||||
};
|
||||
DO_N(10,check_randomized(&cfg3b));
|
||||
|
||||
struct rand_cfg cfg4 = {
|
||||
.min_timeout = 2000,
|
||||
.max_timeout = ((uint64_t)1) << 30,
|
||||
.start_at = 100,
|
||||
.end_at = ((uint64_t)1) << 26,
|
||||
.n_timeouts = 10000,
|
||||
.max_step = 1<<16,
|
||||
.relative = 0,
|
||||
.try_removing = 3,
|
||||
.finalize = 2,
|
||||
};
|
||||
DO_N(10,check_randomized(&cfg4));
|
||||
|
||||
const timeout_t primes[] = {
|
||||
2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,
|
||||
59,61,67,71,73,79,83,89,97
|
||||
};
|
||||
const timeout_t factors_of_1337[] = {
|
||||
1, 7, 191, 1337
|
||||
};
|
||||
const timeout_t multiples_of_five[] = {
|
||||
5, 10, 15, 20, 25, 30, 35, 40, 45, 50
|
||||
};
|
||||
|
||||
struct intervals_cfg icfg1 = {
|
||||
.timeouts = primes,
|
||||
.n_timeouts = sizeof(primes)/sizeof(timeout_t),
|
||||
.start_at = 50,
|
||||
.end_at = 5322,
|
||||
.skip = 0,
|
||||
};
|
||||
DO(check_intervals(&icfg1));
|
||||
|
||||
struct intervals_cfg icfg2 = {
|
||||
.timeouts = factors_of_1337,
|
||||
.n_timeouts = sizeof(factors_of_1337)/sizeof(timeout_t),
|
||||
.start_at = 50,
|
||||
.end_at = 50000,
|
||||
.skip = 0,
|
||||
};
|
||||
DO(check_intervals(&icfg2));
|
||||
|
||||
struct intervals_cfg icfg3 = {
|
||||
.timeouts = multiples_of_five,
|
||||
.n_timeouts = sizeof(multiples_of_five)/sizeof(timeout_t),
|
||||
.start_at = 49,
|
||||
.end_at = 5333,
|
||||
.skip = 0,
|
||||
};
|
||||
DO(check_intervals(&icfg3));
|
||||
|
||||
struct intervals_cfg icfg4 = {
|
||||
.timeouts = primes,
|
||||
.n_timeouts = sizeof(primes)/sizeof(timeout_t),
|
||||
.start_at = 50,
|
||||
.end_at = 5322,
|
||||
.skip = 16,
|
||||
};
|
||||
DO(check_intervals(&icfg4));
|
||||
|
||||
if (n_failed) {
|
||||
puts("\nFAIL");
|
||||
} else {
|
||||
puts("\nOK");
|
||||
}
|
||||
return !!n_failed;
|
||||
}
|
||||
|
||||
/* TODO:
|
||||
|
||||
* Solve PR#3.
|
||||
|
||||
* Investigate whether any untaken branches are possible.
|
||||
|
||||
*/
|
249
src/ext/timeouts/timeout-bitops.c
Normal file
249
src/ext/timeouts/timeout-bitops.c
Normal file
@ -0,0 +1,249 @@
|
||||
#include <stdint.h>
|
||||
#ifdef _MSC_VER
|
||||
#include <intrin.h> /* _BitScanForward, _BitScanReverse */
|
||||
#endif
|
||||
|
||||
/* First define ctz and clz functions; these are compiler-dependent if
|
||||
* you want them to be fast. */
|
||||
#if defined(__GNUC__) && !defined(TIMEOUT_DISABLE_GNUC_BITOPS)
|
||||
|
||||
/* On GCC and clang and some others, we can use __builtin functions. They
|
||||
* are not defined for n==0, but timeout.s never calls them with n==0. */
|
||||
|
||||
#define ctz64(n) __builtin_ctzll(n)
|
||||
#define clz64(n) __builtin_clzll(n)
|
||||
#if LONG_BITS == 32
|
||||
#define ctz32(n) __builtin_ctzl(n)
|
||||
#define clz32(n) __builtin_clzl(n)
|
||||
#else
|
||||
#define ctz32(n) __builtin_ctz(n)
|
||||
#define clz32(n) __builtin_clz(n)
|
||||
#endif
|
||||
|
||||
#elif defined(_MSC_VER) && !defined(TIMEOUT_DISABLE_MSVC_BITOPS)
|
||||
|
||||
/* On MSVC, we have these handy functions. We can ignore their return
|
||||
* values, since we will never supply val == 0. */
|
||||
|
||||
static __inline int ctz32(unsigned long val)
|
||||
{
|
||||
DWORD zeros = 0;
|
||||
_BitScanForward(&zeros, val);
|
||||
return zeros;
|
||||
}
|
||||
static __inline int clz32(unsigned long val)
|
||||
{
|
||||
DWORD zeros = 0;
|
||||
_BitScanReverse(&zeros, val);
|
||||
return zeros;
|
||||
}
|
||||
#ifdef _WIN64
|
||||
/* According to the documentation, these only exist on Win64. */
|
||||
static __inline int ctz64(uint64_t val)
|
||||
{
|
||||
DWORD zeros = 0;
|
||||
_BitScanForward64(&zeros, val);
|
||||
return zeros;
|
||||
}
|
||||
static __inline int clz64(uint64_t val)
|
||||
{
|
||||
DWORD zeros = 0;
|
||||
_BitScanReverse64(&zeros, val);
|
||||
return zeros;
|
||||
}
|
||||
#else
|
||||
static __inline int ctz64(uint64_t val)
|
||||
{
|
||||
uint32_t lo = (uint32_t) val;
|
||||
uint32_t hi = (uint32_t) (val >> 32);
|
||||
return lo ? ctz32(lo) : 32 + ctz32(hi);
|
||||
}
|
||||
static __inline int clz64(uint64_t val)
|
||||
{
|
||||
uint32_t lo = (uint32_t) val;
|
||||
uint32_t hi = (uint32_t) (val >> 32);
|
||||
return hi ? clz32(hi) : 32 + clz32(lo);
|
||||
}
|
||||
#endif
|
||||
|
||||
/* End of MSVC case. */
|
||||
|
||||
#else
|
||||
|
||||
/* TODO: There are more clever ways to do this in the generic case. */
|
||||
|
||||
|
||||
#define process_(one, cz_bits, bits) \
|
||||
if (x < ( one << (cz_bits - bits))) { rv += bits; x <<= bits; }
|
||||
|
||||
#define process64(bits) process_((UINT64_C(1)), 64, (bits))
|
||||
static inline int clz64(uint64_t x)
|
||||
{
|
||||
int rv = 0;
|
||||
|
||||
process64(32);
|
||||
process64(16);
|
||||
process64(8);
|
||||
process64(4);
|
||||
process64(2);
|
||||
process64(1);
|
||||
return rv;
|
||||
}
|
||||
#define process32(bits) process_((UINT32_C(1)), 32, (bits))
|
||||
static inline int clz32(uint32_t x)
|
||||
{
|
||||
int rv = 0;
|
||||
|
||||
process32(16);
|
||||
process32(8);
|
||||
process32(4);
|
||||
process32(2);
|
||||
process32(1);
|
||||
return rv;
|
||||
}
|
||||
|
||||
#undef process_
|
||||
#undef process32
|
||||
#undef process64
|
||||
#define process_(one, bits) \
|
||||
if ((x & ((one << (bits))-1)) == 0) { rv += bits; x >>= bits; }
|
||||
|
||||
#define process64(bits) process_((UINT64_C(1)), bits)
|
||||
static inline int ctz64(uint64_t x)
|
||||
{
|
||||
int rv = 0;
|
||||
|
||||
process64(32);
|
||||
process64(16);
|
||||
process64(8);
|
||||
process64(4);
|
||||
process64(2);
|
||||
process64(1);
|
||||
return rv;
|
||||
}
|
||||
|
||||
#define process32(bits) process_((UINT32_C(1)), bits)
|
||||
static inline int ctz32(uint32_t x)
|
||||
{
|
||||
int rv = 0;
|
||||
|
||||
process32(16);
|
||||
process32(8);
|
||||
process32(4);
|
||||
process32(2);
|
||||
process32(1);
|
||||
return rv;
|
||||
}
|
||||
|
||||
#undef process32
|
||||
#undef process64
|
||||
#undef process_
|
||||
|
||||
/* End of generic case */
|
||||
|
||||
#endif /* End of defining ctz */
|
||||
|
||||
#ifdef TEST_BITOPS
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
static uint64_t testcases[] = {
|
||||
13371337 * 10,
|
||||
100,
|
||||
385789752,
|
||||
82574,
|
||||
(((uint64_t)1)<<63) + (((uint64_t)1)<<31) + 10101
|
||||
};
|
||||
|
||||
static int
|
||||
naive_clz(int bits, uint64_t v)
|
||||
{
|
||||
int r = 0;
|
||||
uint64_t bit = ((uint64_t)1) << (bits-1);
|
||||
while (bit && 0 == (v & bit)) {
|
||||
r++;
|
||||
bit >>= 1;
|
||||
}
|
||||
/* printf("clz(%d,%lx) -> %d\n", bits, v, r); */
|
||||
return r;
|
||||
}
|
||||
|
||||
static int
|
||||
naive_ctz(int bits, uint64_t v)
|
||||
{
|
||||
int r = 0;
|
||||
uint64_t bit = 1;
|
||||
while (bit && 0 == (v & bit)) {
|
||||
r++;
|
||||
bit <<= 1;
|
||||
if (r == bits)
|
||||
break;
|
||||
}
|
||||
/* printf("ctz(%d,%lx) -> %d\n", bits, v, r); */
|
||||
return r;
|
||||
}
|
||||
|
||||
static int
|
||||
check(uint64_t vv)
|
||||
{
|
||||
uint32_t v32 = (uint32_t) vv;
|
||||
|
||||
if (vv == 0)
|
||||
return 1; /* c[tl]z64(0) is undefined. */
|
||||
|
||||
if (ctz64(vv) != naive_ctz(64, vv)) {
|
||||
printf("mismatch with ctz64: %d\n", ctz64(vv));
|
||||
exit(1);
|
||||
return 0;
|
||||
}
|
||||
if (clz64(vv) != naive_clz(64, vv)) {
|
||||
printf("mismatch with clz64: %d\n", clz64(vv));
|
||||
exit(1);
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (v32 == 0)
|
||||
return 1; /* c[lt]z(0) is undefined. */
|
||||
|
||||
if (ctz32(v32) != naive_ctz(32, v32)) {
|
||||
printf("mismatch with ctz32: %d\n", ctz32(v32));
|
||||
exit(1);
|
||||
return 0;
|
||||
}
|
||||
if (clz32(v32) != naive_clz(32, v32)) {
|
||||
printf("mismatch with clz32: %d\n", clz32(v32));
|
||||
exit(1);
|
||||
return 0;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
int
|
||||
main(int c, char **v)
|
||||
{
|
||||
unsigned int i;
|
||||
const unsigned int n = sizeof(testcases)/sizeof(testcases[0]);
|
||||
int result = 0;
|
||||
|
||||
for (i = 0; i <= 63; ++i) {
|
||||
uint64_t x = 1 << i;
|
||||
if (!check(x))
|
||||
result = 1;
|
||||
--x;
|
||||
if (!check(x))
|
||||
result = 1;
|
||||
}
|
||||
|
||||
for (i = 0; i < n; ++i) {
|
||||
if (! check(testcases[i]))
|
||||
result = 1;
|
||||
}
|
||||
if (result) {
|
||||
puts("FAIL");
|
||||
} else {
|
||||
puts("OK");
|
||||
}
|
||||
return result;
|
||||
}
|
||||
#endif
|
||||
|
77
src/ext/timeouts/timeout-debug.h
Normal file
77
src/ext/timeouts/timeout-debug.h
Normal file
@ -0,0 +1,77 @@
|
||||
/*
|
||||
* D E B U G R O U T I N E S
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
#if TIMEOUT_DEBUG - 0
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#undef TIMEOUT_DEBUG
|
||||
#define TIMEOUT_DEBUG 1
|
||||
#define DEBUG_LEVEL timeout_debug
|
||||
|
||||
static int timeout_debug;
|
||||
|
||||
#define SAYit_(lvl, fmt, ...) do { \
|
||||
if (DEBUG_LEVEL >= (lvl)) \
|
||||
fprintf(stderr, fmt "%s", __FILE__, __LINE__, __func__, __VA_ARGS__); \
|
||||
} while (0)
|
||||
|
||||
#define SAYit(lvl, ...) SAYit_((lvl), "%s:%d:%s: " __VA_ARGS__, "\n")
|
||||
|
||||
#define PANIC(...) do { \
|
||||
SAYit(0, __VA_ARGS__); \
|
||||
_Exit(EXIT_FAILURE); \
|
||||
} while (0)
|
||||
#else
|
||||
#undef TIMEOUT_DEBUG
|
||||
#define TIMEOUT_DEBUG 0
|
||||
#define DEBUG_LEVEL 0
|
||||
|
||||
#define SAYit(...) (void)0
|
||||
#endif
|
||||
|
||||
#define SAY(...) SAYit(1, __VA_ARGS__)
|
||||
#define HAI SAY("HAI")
|
||||
|
||||
|
||||
static inline char *fmt_(char *buf, uint64_t ts, int wheel_bit, int wheel_num) {
|
||||
char *p = buf;
|
||||
int wheel, n, i;
|
||||
|
||||
for (wheel = wheel_num - 2; wheel >= 0; wheel--) {
|
||||
n = ((1 << wheel_bit) - 1) & (ts >> (wheel * WHEEL_BIT));
|
||||
|
||||
for (i = wheel_bit - 1; i >= 0; i--) {
|
||||
*p++ = '0' + !!(n & (1 << i));
|
||||
}
|
||||
|
||||
if (wheel != 0)
|
||||
*p++ = ':';
|
||||
}
|
||||
|
||||
*p = 0;
|
||||
|
||||
return buf;
|
||||
} /* fmt_() */
|
||||
|
||||
#define fmt(ts) fmt_(((char[((1 << WHEEL_BIT) * WHEEL_NUM) + WHEEL_NUM + 1]){ 0 }), (ts), WHEEL_BIT, WHEEL_NUM)
|
||||
|
||||
|
||||
static inline char *bin64_(char *buf, uint64_t n, int wheel_bit) {
|
||||
char *p = buf;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < (1 << wheel_bit); i++) {
|
||||
*p++ = "01"[0x1 & (n >> (((1 << wheel_bit) - 1) - i))];
|
||||
}
|
||||
|
||||
*p = 0;
|
||||
|
||||
return buf;
|
||||
} /* bin64_() */
|
||||
|
||||
#define bin64(ts) bin64_(((char[((1 << WHEEL_BIT) * WHEEL_NUM) + 1]){ 0 }), (ts), WHEEL_BIT)
|
||||
|
||||
|
744
src/ext/timeouts/timeout.c
Normal file
744
src/ext/timeouts/timeout.c
Normal file
@ -0,0 +1,744 @@
|
||||
/* ==========================================================================
|
||||
* timeout.c - Tickless hierarchical timing wheel.
|
||||
* --------------------------------------------------------------------------
|
||||
* Copyright (c) 2013, 2014 William Ahern
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a
|
||||
* copy of this software and associated documentation files (the
|
||||
* "Software"), to deal in the Software without restriction, including
|
||||
* without limitation the rights to use, copy, modify, merge, publish,
|
||||
* distribute, sublicense, and/or sell copies of the Software, and to permit
|
||||
* persons to whom the Software is furnished to do so, subject to the
|
||||
* following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included
|
||||
* in all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
||||
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
||||
* NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
||||
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
||||
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
||||
* USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||||
* ==========================================================================
|
||||
*/
|
||||
#include <limits.h> /* CHAR_BIT */
|
||||
|
||||
#include <stddef.h> /* NULL */
|
||||
#include <stdlib.h> /* malloc(3) free(3) */
|
||||
#include <stdio.h> /* FILE fprintf(3) */
|
||||
|
||||
#include <inttypes.h> /* UINT64_C uint64_t */
|
||||
|
||||
#include <string.h> /* memset(3) */
|
||||
|
||||
#include <errno.h> /* errno */
|
||||
|
||||
#include <sys/queue.h> /* TAILQ(3) */
|
||||
|
||||
#include "timeout.h"
|
||||
|
||||
#if TIMEOUT_DEBUG - 0
|
||||
#include "timeout-debug.h"
|
||||
#endif
|
||||
|
||||
#ifdef TIMEOUT_DISABLE_RELATIVE_ACCESS
|
||||
#define TO_SET_TIMEOUTS(to, T) ((void)0)
|
||||
#else
|
||||
#define TO_SET_TIMEOUTS(to, T) ((to)->timeouts = (T))
|
||||
#endif
|
||||
|
||||
/*
|
||||
* A N C I L L A R Y R O U T I N E S
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
#define abstime_t timeout_t /* for documentation purposes */
|
||||
#define reltime_t timeout_t /* "" */
|
||||
|
||||
#if !defined countof
|
||||
#define countof(a) (sizeof (a) / sizeof *(a))
|
||||
#endif
|
||||
|
||||
#if !defined endof
|
||||
#define endof(a) (&(a)[countof(a)])
|
||||
#endif
|
||||
|
||||
#if !defined MIN
|
||||
#define MIN(a, b) (((a) < (b))? (a) : (b))
|
||||
#endif
|
||||
|
||||
#if !defined MAX
|
||||
#define MAX(a, b) (((a) > (b))? (a) : (b))
|
||||
#endif
|
||||
|
||||
#if !defined TAILQ_CONCAT
|
||||
#define TAILQ_CONCAT(head1, head2, field) do { \
|
||||
if (!TAILQ_EMPTY(head2)) { \
|
||||
*(head1)->tqh_last = (head2)->tqh_first; \
|
||||
(head2)->tqh_first->field.tqe_prev = (head1)->tqh_last; \
|
||||
(head1)->tqh_last = (head2)->tqh_last; \
|
||||
TAILQ_INIT((head2)); \
|
||||
} \
|
||||
} while (0)
|
||||
#endif
|
||||
|
||||
#if !defined TAILQ_FOREACH_SAFE
|
||||
#define TAILQ_FOREACH_SAFE(var, head, field, tvar) \
|
||||
for ((var) = TAILQ_FIRST(head); \
|
||||
(var) && ((tvar) = TAILQ_NEXT(var, field), 1); \
|
||||
(var) = (tvar))
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
* B I T M A N I P U L A T I O N R O U T I N E S
|
||||
*
|
||||
* The macros and routines below implement wheel parameterization. The
|
||||
* inputs are:
|
||||
*
|
||||
* WHEEL_BIT - The number of value bits mapped in each wheel. The
|
||||
* lowest-order WHEEL_BIT bits index the lowest-order (highest
|
||||
* resolution) wheel, the next group of WHEEL_BIT bits the
|
||||
* higher wheel, etc.
|
||||
*
|
||||
* WHEEL_NUM - The number of wheels. WHEEL_BIT * WHEEL_NUM = the number of
|
||||
* value bits used by all the wheels. For the default of 6 and
|
||||
* 4, only the low 24 bits are processed. Any timeout value
|
||||
* larger than this will cycle through again.
|
||||
*
|
||||
* The implementation uses bit fields to remember which slot in each wheel
|
||||
* is populated, and to generate masks of expiring slots according to the
|
||||
* current update interval (i.e. the "tickless" aspect). The slots to
|
||||
* process in a wheel are (populated-set & interval-mask).
|
||||
*
|
||||
* WHEEL_BIT cannot be larger than 6 bits because 2^6 -> 64 is the largest
|
||||
* number of slots which can be tracked in a uint64_t integer bit field.
|
||||
* WHEEL_BIT cannot be smaller than 3 bits because of our rotr and rotl
|
||||
* routines, which only operate on all the value bits in an integer, and
|
||||
* there's no integer smaller than uint8_t.
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
#if !defined WHEEL_BIT
|
||||
#define WHEEL_BIT 6
|
||||
#endif
|
||||
|
||||
#if !defined WHEEL_NUM
|
||||
#define WHEEL_NUM 4
|
||||
#endif
|
||||
|
||||
#define WHEEL_LEN (1U << WHEEL_BIT)
|
||||
#define WHEEL_MAX (WHEEL_LEN - 1)
|
||||
#define WHEEL_MASK (WHEEL_LEN - 1)
|
||||
#define TIMEOUT_MAX ((TIMEOUT_C(1) << (WHEEL_BIT * WHEEL_NUM)) - 1)
|
||||
|
||||
#include "timeout-bitops.c"
|
||||
|
||||
#if WHEEL_BIT == 6
|
||||
#define ctz(n) ctz64(n)
|
||||
#define clz(n) clz64(n)
|
||||
#define fls(n) ((int)(64 - clz64(n)))
|
||||
#else
|
||||
#define ctz(n) ctz32(n)
|
||||
#define clz(n) clz32(n)
|
||||
#define fls(n) ((int)(32 - clz32(n)))
|
||||
#endif
|
||||
|
||||
#if WHEEL_BIT == 6
|
||||
#define WHEEL_C(n) UINT64_C(n)
|
||||
#define WHEEL_PRIu PRIu64
|
||||
#define WHEEL_PRIx PRIx64
|
||||
|
||||
typedef uint64_t wheel_t;
|
||||
|
||||
#elif WHEEL_BIT == 5
|
||||
|
||||
#define WHEEL_C(n) UINT32_C(n)
|
||||
#define WHEEL_PRIu PRIu32
|
||||
#define WHEEL_PRIx PRIx32
|
||||
|
||||
typedef uint32_t wheel_t;
|
||||
|
||||
#elif WHEEL_BIT == 4
|
||||
|
||||
#define WHEEL_C(n) UINT16_C(n)
|
||||
#define WHEEL_PRIu PRIu16
|
||||
#define WHEEL_PRIx PRIx16
|
||||
|
||||
typedef uint16_t wheel_t;
|
||||
|
||||
#elif WHEEL_BIT == 3
|
||||
|
||||
#define WHEEL_C(n) UINT8_C(n)
|
||||
#define WHEEL_PRIu PRIu8
|
||||
#define WHEEL_PRIx PRIx8
|
||||
|
||||
typedef uint8_t wheel_t;
|
||||
|
||||
#else
|
||||
#error invalid WHEEL_BIT value
|
||||
#endif
|
||||
|
||||
|
||||
static inline wheel_t rotl(const wheel_t v, int c) {
|
||||
if (!(c &= (sizeof v * CHAR_BIT - 1)))
|
||||
return v;
|
||||
|
||||
return (v << c) | (v >> (sizeof v * CHAR_BIT - c));
|
||||
} /* rotl() */
|
||||
|
||||
|
||||
static inline wheel_t rotr(const wheel_t v, int c) {
|
||||
if (!(c &= (sizeof v * CHAR_BIT - 1)))
|
||||
return v;
|
||||
|
||||
return (v >> c) | (v << (sizeof v * CHAR_BIT - c));
|
||||
} /* rotr() */
|
||||
|
||||
|
||||
/*
|
||||
* T I M E R R O U T I N E S
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
TAILQ_HEAD(timeout_list, timeout);
|
||||
|
||||
struct timeouts {
|
||||
struct timeout_list wheel[WHEEL_NUM][WHEEL_LEN], expired;
|
||||
|
||||
wheel_t pending[WHEEL_NUM];
|
||||
|
||||
timeout_t curtime;
|
||||
timeout_t hertz;
|
||||
}; /* struct timeouts */
|
||||
|
||||
|
||||
static struct timeouts *timeouts_init(struct timeouts *T, timeout_t hz) {
|
||||
unsigned i, j;
|
||||
|
||||
for (i = 0; i < countof(T->wheel); i++) {
|
||||
for (j = 0; j < countof(T->wheel[i]); j++) {
|
||||
TAILQ_INIT(&T->wheel[i][j]);
|
||||
}
|
||||
}
|
||||
|
||||
TAILQ_INIT(&T->expired);
|
||||
|
||||
for (i = 0; i < countof(T->pending); i++) {
|
||||
T->pending[i] = 0;
|
||||
}
|
||||
|
||||
T->curtime = 0;
|
||||
T->hertz = (hz)? hz : TIMEOUT_mHZ;
|
||||
|
||||
return T;
|
||||
} /* timeouts_init() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC struct timeouts *timeouts_open(timeout_t hz, int *error) {
|
||||
struct timeouts *T;
|
||||
|
||||
if ((T = malloc(sizeof *T)))
|
||||
return timeouts_init(T, hz);
|
||||
|
||||
*error = errno;
|
||||
|
||||
return NULL;
|
||||
} /* timeouts_open() */
|
||||
|
||||
|
||||
static void timeouts_reset(struct timeouts *T) {
|
||||
struct timeout_list reset;
|
||||
struct timeout *to;
|
||||
unsigned i, j;
|
||||
|
||||
TAILQ_INIT(&reset);
|
||||
|
||||
for (i = 0; i < countof(T->wheel); i++) {
|
||||
for (j = 0; j < countof(T->wheel[i]); j++) {
|
||||
TAILQ_CONCAT(&reset, &T->wheel[i][j], tqe);
|
||||
}
|
||||
}
|
||||
|
||||
TAILQ_CONCAT(&reset, &T->expired, tqe);
|
||||
|
||||
TAILQ_FOREACH(to, &reset, tqe) {
|
||||
to->pending = NULL;
|
||||
TO_SET_TIMEOUTS(to, NULL);
|
||||
}
|
||||
} /* timeouts_reset() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC void timeouts_close(struct timeouts *T) {
|
||||
/*
|
||||
* NOTE: Delete installed timeouts so timeout_pending() and
|
||||
* timeout_expired() worked as expected.
|
||||
*/
|
||||
timeouts_reset(T);
|
||||
|
||||
free(T);
|
||||
} /* timeouts_close() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC timeout_t timeouts_hz(struct timeouts *T) {
|
||||
return T->hertz;
|
||||
} /* timeouts_hz() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC void timeouts_del(struct timeouts *T, struct timeout *to) {
|
||||
if (to->pending) {
|
||||
TAILQ_REMOVE(to->pending, to, tqe);
|
||||
|
||||
if (to->pending != &T->expired && TAILQ_EMPTY(to->pending)) {
|
||||
ptrdiff_t index = to->pending - &T->wheel[0][0];
|
||||
int wheel = index / WHEEL_LEN;
|
||||
int slot = index % WHEEL_LEN;
|
||||
|
||||
T->pending[wheel] &= ~(WHEEL_C(1) << slot);
|
||||
}
|
||||
|
||||
to->pending = NULL;
|
||||
TO_SET_TIMEOUTS(to, NULL);
|
||||
}
|
||||
} /* timeouts_del() */
|
||||
|
||||
|
||||
static inline reltime_t timeout_rem(struct timeouts *T, struct timeout *to) {
|
||||
return to->expires - T->curtime;
|
||||
} /* timeout_rem() */
|
||||
|
||||
|
||||
static inline int timeout_wheel(timeout_t timeout) {
|
||||
/* must be called with timeout != 0, so fls input is nonzero */
|
||||
return (fls(MIN(timeout, TIMEOUT_MAX)) - 1) / WHEEL_BIT;
|
||||
} /* timeout_wheel() */
|
||||
|
||||
|
||||
static inline int timeout_slot(int wheel, timeout_t expires) {
|
||||
return WHEEL_MASK & ((expires >> (wheel * WHEEL_BIT)) - !!wheel);
|
||||
} /* timeout_slot() */
|
||||
|
||||
|
||||
static void timeouts_sched(struct timeouts *T, struct timeout *to, timeout_t expires) {
|
||||
timeout_t rem;
|
||||
int wheel, slot;
|
||||
|
||||
timeouts_del(T, to);
|
||||
|
||||
to->expires = expires;
|
||||
|
||||
TO_SET_TIMEOUTS(to, T);
|
||||
|
||||
if (expires > T->curtime) {
|
||||
rem = timeout_rem(T, to);
|
||||
|
||||
/* rem is nonzero since:
|
||||
* rem == timeout_rem(T,to),
|
||||
* == to->expires - T->curtime
|
||||
* and above we have expires > T->curtime.
|
||||
*/
|
||||
wheel = timeout_wheel(rem);
|
||||
slot = timeout_slot(wheel, to->expires);
|
||||
|
||||
to->pending = &T->wheel[wheel][slot];
|
||||
TAILQ_INSERT_TAIL(to->pending, to, tqe);
|
||||
|
||||
T->pending[wheel] |= WHEEL_C(1) << slot;
|
||||
} else {
|
||||
to->pending = &T->expired;
|
||||
TAILQ_INSERT_TAIL(to->pending, to, tqe);
|
||||
}
|
||||
} /* timeouts_sched() */
|
||||
|
||||
|
||||
#ifndef TIMEOUT_DISABLE_INTERVALS
|
||||
static void timeouts_readd(struct timeouts *T, struct timeout *to) {
|
||||
to->expires += to->interval;
|
||||
|
||||
if (to->expires <= T->curtime) {
|
||||
/* If we've missed the next firing of this timeout, reschedule
|
||||
* it to occur at the next multiple of its interval after
|
||||
* the last time that it fired.
|
||||
*/
|
||||
timeout_t n = T->curtime - to->expires;
|
||||
timeout_t r = n % to->interval;
|
||||
to->expires = T->curtime + (to->interval - r);
|
||||
}
|
||||
|
||||
timeouts_sched(T, to, to->expires);
|
||||
} /* timeouts_readd() */
|
||||
#endif
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC void timeouts_add(struct timeouts *T, struct timeout *to, timeout_t timeout) {
|
||||
#ifndef TIMEOUT_DISABLE_INTERVALS
|
||||
if (to->flags & TIMEOUT_INT)
|
||||
to->interval = MAX(1, timeout);
|
||||
#endif
|
||||
|
||||
if (to->flags & TIMEOUT_ABS)
|
||||
timeouts_sched(T, to, timeout);
|
||||
else
|
||||
timeouts_sched(T, to, T->curtime + timeout);
|
||||
} /* timeouts_add() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC void timeouts_update(struct timeouts *T, abstime_t curtime) {
|
||||
timeout_t elapsed = curtime - T->curtime;
|
||||
struct timeout_list todo;
|
||||
int wheel;
|
||||
|
||||
TAILQ_INIT(&todo);
|
||||
|
||||
/*
|
||||
* There's no avoiding looping over every wheel. It's best to keep
|
||||
* WHEEL_NUM smallish.
|
||||
*/
|
||||
for (wheel = 0; wheel < WHEEL_NUM; wheel++) {
|
||||
wheel_t pending;
|
||||
|
||||
/*
|
||||
* Calculate the slots expiring in this wheel
|
||||
*
|
||||
* If the elapsed time is greater than the maximum period of
|
||||
* the wheel, mark every position as expiring.
|
||||
*
|
||||
* Otherwise, to determine the expired slots fill in all the
|
||||
* bits between the last slot processed and the current
|
||||
* slot, inclusive of the last slot. We'll bitwise-AND this
|
||||
* with our pending set below.
|
||||
*
|
||||
* If a wheel rolls over, force a tick of the next higher
|
||||
* wheel.
|
||||
*/
|
||||
if ((elapsed >> (wheel * WHEEL_BIT)) > WHEEL_MAX) {
|
||||
pending = (wheel_t)~WHEEL_C(0);
|
||||
} else {
|
||||
wheel_t _elapsed = WHEEL_MASK & (elapsed >> (wheel * WHEEL_BIT));
|
||||
int oslot, nslot;
|
||||
|
||||
/*
|
||||
* TODO: It's likely that at least one of the
|
||||
* following three bit fill operations is redundant
|
||||
* or can be replaced with a simpler operation.
|
||||
*/
|
||||
oslot = WHEEL_MASK & (T->curtime >> (wheel * WHEEL_BIT));
|
||||
pending = rotl(((UINT64_C(1) << _elapsed) - 1), oslot);
|
||||
|
||||
nslot = WHEEL_MASK & (curtime >> (wheel * WHEEL_BIT));
|
||||
pending |= rotr(rotl(((WHEEL_C(1) << _elapsed) - 1), nslot), _elapsed);
|
||||
pending |= WHEEL_C(1) << nslot;
|
||||
}
|
||||
|
||||
while (pending & T->pending[wheel]) {
|
||||
/* ctz input cannot be zero: loop condition. */
|
||||
int slot = ctz(pending & T->pending[wheel]);
|
||||
TAILQ_CONCAT(&todo, &T->wheel[wheel][slot], tqe);
|
||||
T->pending[wheel] &= ~(UINT64_C(1) << slot);
|
||||
}
|
||||
|
||||
if (!(0x1 & pending))
|
||||
break; /* break if we didn't wrap around end of wheel */
|
||||
|
||||
/* if we're continuing, the next wheel must tick at least once */
|
||||
elapsed = MAX(elapsed, (WHEEL_LEN << (wheel * WHEEL_BIT)));
|
||||
}
|
||||
|
||||
T->curtime = curtime;
|
||||
|
||||
while (!TAILQ_EMPTY(&todo)) {
|
||||
struct timeout *to = TAILQ_FIRST(&todo);
|
||||
|
||||
TAILQ_REMOVE(&todo, to, tqe);
|
||||
to->pending = NULL;
|
||||
|
||||
timeouts_sched(T, to, to->expires);
|
||||
}
|
||||
|
||||
return;
|
||||
} /* timeouts_update() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC void timeouts_step(struct timeouts *T, reltime_t elapsed) {
|
||||
timeouts_update(T, T->curtime + elapsed);
|
||||
} /* timeouts_step() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC bool timeouts_pending(struct timeouts *T) {
|
||||
wheel_t pending = 0;
|
||||
int wheel;
|
||||
|
||||
for (wheel = 0; wheel < WHEEL_NUM; wheel++) {
|
||||
pending |= T->pending[wheel];
|
||||
}
|
||||
|
||||
return !!pending;
|
||||
} /* timeouts_pending() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC bool timeouts_expired(struct timeouts *T) {
|
||||
return !TAILQ_EMPTY(&T->expired);
|
||||
} /* timeouts_expired() */
|
||||
|
||||
|
||||
/*
|
||||
* Calculate the interval before needing to process any timeouts pending on
|
||||
* any wheel.
|
||||
*
|
||||
* (This is separated from the public API routine so we can evaluate our
|
||||
* wheel invariant assertions irrespective of the expired queue.)
|
||||
*
|
||||
* This might return a timeout value sooner than any installed timeout if
|
||||
* only higher-order wheels have timeouts pending. We can only know when to
|
||||
* process a wheel, not precisely when a timeout is scheduled. Our timeout
|
||||
* accuracy could be off by 2^(N*M)-1 units where N is the wheel number and
|
||||
* M is WHEEL_BIT. Only timeouts which have fallen through to wheel 0 can be
|
||||
* known exactly.
|
||||
*
|
||||
* We should never return a timeout larger than the lowest actual timeout.
|
||||
*/
|
||||
static timeout_t timeouts_int(struct timeouts *T) {
|
||||
timeout_t timeout = ~TIMEOUT_C(0), _timeout;
|
||||
timeout_t relmask;
|
||||
int wheel, slot;
|
||||
|
||||
relmask = 0;
|
||||
|
||||
for (wheel = 0; wheel < WHEEL_NUM; wheel++) {
|
||||
if (T->pending[wheel]) {
|
||||
slot = WHEEL_MASK & (T->curtime >> (wheel * WHEEL_BIT));
|
||||
|
||||
/* ctz input cannot be zero: T->pending[wheel] is
|
||||
* nonzero, so rotr() is nonzero. */
|
||||
_timeout = (ctz(rotr(T->pending[wheel], slot)) + !!wheel) << (wheel * WHEEL_BIT);
|
||||
/* +1 to higher order wheels as those timeouts are one rotation in the future (otherwise they'd be on a lower wheel or expired) */
|
||||
|
||||
_timeout -= relmask & T->curtime;
|
||||
/* reduce by how much lower wheels have progressed */
|
||||
|
||||
timeout = MIN(_timeout, timeout);
|
||||
}
|
||||
|
||||
relmask <<= WHEEL_BIT;
|
||||
relmask |= WHEEL_MASK;
|
||||
}
|
||||
|
||||
return timeout;
|
||||
} /* timeouts_int() */
|
||||
|
||||
|
||||
/*
|
||||
* Calculate the interval our caller can wait before needing to process
|
||||
* events.
|
||||
*/
|
||||
TIMEOUT_PUBLIC timeout_t timeouts_timeout(struct timeouts *T) {
|
||||
if (!TAILQ_EMPTY(&T->expired))
|
||||
return 0;
|
||||
|
||||
return timeouts_int(T);
|
||||
} /* timeouts_timeout() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC struct timeout *timeouts_get(struct timeouts *T) {
|
||||
if (!TAILQ_EMPTY(&T->expired)) {
|
||||
struct timeout *to = TAILQ_FIRST(&T->expired);
|
||||
|
||||
TAILQ_REMOVE(&T->expired, to, tqe);
|
||||
to->pending = NULL;
|
||||
TO_SET_TIMEOUTS(to, NULL);
|
||||
|
||||
#ifndef TIMEOUT_DISABLE_INTERVALS
|
||||
if ((to->flags & TIMEOUT_INT) && to->interval > 0)
|
||||
timeouts_readd(T, to);
|
||||
#endif
|
||||
|
||||
return to;
|
||||
} else {
|
||||
return 0;
|
||||
}
|
||||
} /* timeouts_get() */
|
||||
|
||||
|
||||
/*
|
||||
* Use dumb looping to locate the earliest timeout pending on the wheel so
|
||||
* our invariant assertions can check the result of our optimized code.
|
||||
*/
|
||||
static struct timeout *timeouts_min(struct timeouts *T) {
|
||||
struct timeout *to, *min = NULL;
|
||||
unsigned i, j;
|
||||
|
||||
for (i = 0; i < countof(T->wheel); i++) {
|
||||
for (j = 0; j < countof(T->wheel[i]); j++) {
|
||||
TAILQ_FOREACH(to, &T->wheel[i][j], tqe) {
|
||||
if (!min || to->expires < min->expires)
|
||||
min = to;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return min;
|
||||
} /* timeouts_min() */
|
||||
|
||||
|
||||
/*
|
||||
* Check some basic algorithm invariants. If these invariants fail then
|
||||
* something is definitely broken.
|
||||
*/
|
||||
#define report(...) do { \
|
||||
if ((fp)) \
|
||||
fprintf(fp, __VA_ARGS__); \
|
||||
} while (0)
|
||||
|
||||
#define check(expr, ...) do { \
|
||||
if (!(expr)) { \
|
||||
report(__VA_ARGS__); \
|
||||
return 0; \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
TIMEOUT_PUBLIC bool timeouts_check(struct timeouts *T, FILE *fp) {
|
||||
timeout_t timeout;
|
||||
struct timeout *to;
|
||||
|
||||
if ((to = timeouts_min(T))) {
|
||||
check(to->expires > T->curtime, "missed timeout (expires:%" TIMEOUT_PRIu " <= curtime:%" TIMEOUT_PRIu ")\n", to->expires, T->curtime);
|
||||
|
||||
timeout = timeouts_int(T);
|
||||
check(timeout <= to->expires - T->curtime, "wrong soft timeout (soft:%" TIMEOUT_PRIu " > hard:%" TIMEOUT_PRIu ") (expires:%" TIMEOUT_PRIu "; curtime:%" TIMEOUT_PRIu ")\n", timeout, (to->expires - T->curtime), to->expires, T->curtime);
|
||||
|
||||
timeout = timeouts_timeout(T);
|
||||
check(timeout <= to->expires - T->curtime, "wrong soft timeout (soft:%" TIMEOUT_PRIu " > hard:%" TIMEOUT_PRIu ") (expires:%" TIMEOUT_PRIu "; curtime:%" TIMEOUT_PRIu ")\n", timeout, (to->expires - T->curtime), to->expires, T->curtime);
|
||||
} else {
|
||||
timeout = timeouts_timeout(T);
|
||||
|
||||
if (!TAILQ_EMPTY(&T->expired))
|
||||
check(timeout == 0, "wrong soft timeout (soft:%" TIMEOUT_PRIu " != hard:%" TIMEOUT_PRIu ")\n", timeout, TIMEOUT_C(0));
|
||||
else
|
||||
check(timeout == ~TIMEOUT_C(0), "wrong soft timeout (soft:%" TIMEOUT_PRIu " != hard:%" TIMEOUT_PRIu ")\n", timeout, ~TIMEOUT_C(0));
|
||||
}
|
||||
|
||||
return 1;
|
||||
} /* timeouts_check() */
|
||||
|
||||
|
||||
#define ENTER \
|
||||
do { \
|
||||
static const int pc0 = __LINE__; \
|
||||
switch (pc0 + it->pc) { \
|
||||
case __LINE__: (void)0
|
||||
|
||||
#define SAVE_AND_DO(do_statement) \
|
||||
do { \
|
||||
it->pc = __LINE__ - pc0; \
|
||||
do_statement; \
|
||||
case __LINE__: (void)0; \
|
||||
} while (0)
|
||||
|
||||
#define YIELD(rv) \
|
||||
SAVE_AND_DO(return (rv))
|
||||
|
||||
#define LEAVE \
|
||||
SAVE_AND_DO(break); \
|
||||
} \
|
||||
} while (0)
|
||||
|
||||
TIMEOUT_PUBLIC struct timeout *timeouts_next(struct timeouts *T, struct timeouts_it *it) {
|
||||
struct timeout *to;
|
||||
|
||||
ENTER;
|
||||
|
||||
if (it->flags & TIMEOUTS_EXPIRED) {
|
||||
if (it->flags & TIMEOUTS_CLEAR) {
|
||||
while ((to = timeouts_get(T))) {
|
||||
YIELD(to);
|
||||
}
|
||||
} else {
|
||||
TAILQ_FOREACH_SAFE(to, &T->expired, tqe, it->to) {
|
||||
YIELD(to);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (it->flags & TIMEOUTS_PENDING) {
|
||||
for (it->i = 0; it->i < countof(T->wheel); it->i++) {
|
||||
for (it->j = 0; it->j < countof(T->wheel[it->i]); it->j++) {
|
||||
TAILQ_FOREACH_SAFE(to, &T->wheel[it->i][it->j], tqe, it->to) {
|
||||
YIELD(to);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
LEAVE;
|
||||
|
||||
return NULL;
|
||||
} /* timeouts_next */
|
||||
|
||||
#undef LEAVE
|
||||
#undef YIELD
|
||||
#undef SAVE_AND_DO
|
||||
#undef ENTER
|
||||
|
||||
|
||||
/*
|
||||
* T I M E O U T R O U T I N E S
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
TIMEOUT_PUBLIC struct timeout *timeout_init(struct timeout *to, int flags) {
|
||||
memset(to, 0, sizeof *to);
|
||||
|
||||
to->flags = flags;
|
||||
|
||||
return to;
|
||||
} /* timeout_init() */
|
||||
|
||||
|
||||
#ifndef TIMEOUT_DISABLE_RELATIVE_ACCESS
|
||||
TIMEOUT_PUBLIC bool timeout_pending(struct timeout *to) {
|
||||
return to->pending && to->pending != &to->timeouts->expired;
|
||||
} /* timeout_pending() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC bool timeout_expired(struct timeout *to) {
|
||||
return to->pending && to->pending == &to->timeouts->expired;
|
||||
} /* timeout_expired() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC void timeout_del(struct timeout *to) {
|
||||
timeouts_del(to->timeouts, to);
|
||||
} /* timeout_del() */
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
* V E R S I O N I N T E R F A C E S
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
TIMEOUT_PUBLIC int timeout_version(void) {
|
||||
return TIMEOUT_VERSION;
|
||||
} /* timeout_version() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC const char *timeout_vendor(void) {
|
||||
return TIMEOUT_VENDOR;
|
||||
} /* timeout_version() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC int timeout_v_rel(void) {
|
||||
return TIMEOUT_V_REL;
|
||||
} /* timeout_version() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC int timeout_v_abi(void) {
|
||||
return TIMEOUT_V_ABI;
|
||||
} /* timeout_version() */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC int timeout_v_api(void) {
|
||||
return TIMEOUT_V_API;
|
||||
} /* timeout_version() */
|
||||
|
253
src/ext/timeouts/timeout.h
Normal file
253
src/ext/timeouts/timeout.h
Normal file
@ -0,0 +1,253 @@
|
||||
/* ==========================================================================
|
||||
* timeout.h - Tickless hierarchical timing wheel.
|
||||
* --------------------------------------------------------------------------
|
||||
* Copyright (c) 2013, 2014 William Ahern
|
||||
*
|
||||
* Permission is hereby granted, free of charge, to any person obtaining a
|
||||
* copy of this software and associated documentation files (the
|
||||
* "Software"), to deal in the Software without restriction, including
|
||||
* without limitation the rights to use, copy, modify, merge, publish,
|
||||
* distribute, sublicense, and/or sell copies of the Software, and to permit
|
||||
* persons to whom the Software is furnished to do so, subject to the
|
||||
* following conditions:
|
||||
*
|
||||
* The above copyright notice and this permission notice shall be included
|
||||
* in all copies or substantial portions of the Software.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
||||
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
||||
* NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
||||
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
||||
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
||||
* USE OR OTHER DEALINGS IN THE SOFTWARE.
|
||||
* ==========================================================================
|
||||
*/
|
||||
#ifndef TIMEOUT_H
|
||||
#define TIMEOUT_H
|
||||
|
||||
#include <stdbool.h> /* bool */
|
||||
#include <stdio.h> /* FILE */
|
||||
|
||||
#include <inttypes.h> /* PRIu64 PRIx64 PRIX64 uint64_t */
|
||||
|
||||
#include <sys/queue.h> /* TAILQ(3) */
|
||||
|
||||
|
||||
/*
|
||||
* V E R S I O N I N T E R F A C E S
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
#if !defined TIMEOUT_PUBLIC
|
||||
#define TIMEOUT_PUBLIC
|
||||
#endif
|
||||
|
||||
#define TIMEOUT_VERSION TIMEOUT_V_REL
|
||||
#define TIMEOUT_VENDOR "william@25thandClement.com"
|
||||
|
||||
#define TIMEOUT_V_REL 0x20160226
|
||||
#define TIMEOUT_V_ABI 0x20160224
|
||||
#define TIMEOUT_V_API 0x20160226
|
||||
|
||||
TIMEOUT_PUBLIC int timeout_version(void);
|
||||
|
||||
TIMEOUT_PUBLIC const char *timeout_vendor(void);
|
||||
|
||||
TIMEOUT_PUBLIC int timeout_v_rel(void);
|
||||
|
||||
TIMEOUT_PUBLIC int timeout_v_abi(void);
|
||||
|
||||
TIMEOUT_PUBLIC int timeout_v_api(void);
|
||||
|
||||
|
||||
/*
|
||||
* I N T E G E R T Y P E I N T E R F A C E S
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
#define TIMEOUT_C(n) UINT64_C(n)
|
||||
#define TIMEOUT_PRIu PRIu64
|
||||
#define TIMEOUT_PRIx PRIx64
|
||||
#define TIMEOUT_PRIX PRIX64
|
||||
|
||||
#define TIMEOUT_mHZ TIMEOUT_C(1000)
|
||||
#define TIMEOUT_uHZ TIMEOUT_C(1000000)
|
||||
#define TIMEOUT_nHZ TIMEOUT_C(1000000000)
|
||||
|
||||
typedef uint64_t timeout_t;
|
||||
|
||||
#define timeout_error_t int /* for documentation purposes */
|
||||
|
||||
|
||||
/*
|
||||
* C A L L B A C K I N T E R F A C E
|
||||
*
|
||||
* Callback function parameters unspecified to make embedding into existing
|
||||
* applications easier.
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
#ifndef TIMEOUT_CB_OVERRIDE
|
||||
struct timeout_cb {
|
||||
void (*fn)();
|
||||
void *arg;
|
||||
}; /* struct timeout_cb */
|
||||
#endif
|
||||
|
||||
/*
|
||||
* T I M E O U T I N T E R F A C E S
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
#ifndef TIMEOUT_DISABLE_INTERVALS
|
||||
#define TIMEOUT_INT 0x01 /* interval (repeating) timeout */
|
||||
#endif
|
||||
#define TIMEOUT_ABS 0x02 /* treat timeout values as absolute */
|
||||
|
||||
#define TIMEOUT_INITIALIZER(flags) { (flags) }
|
||||
|
||||
#define timeout_setcb(to, fn, arg) do { \
|
||||
(to)->callback.fn = (fn); \
|
||||
(to)->callback.arg = (arg); \
|
||||
} while (0)
|
||||
|
||||
struct timeout {
|
||||
int flags;
|
||||
|
||||
timeout_t expires;
|
||||
/* absolute expiration time */
|
||||
|
||||
struct timeout_list *pending;
|
||||
/* timeout list if pending on wheel or expiry queue */
|
||||
|
||||
TAILQ_ENTRY(timeout) tqe;
|
||||
/* entry member for struct timeout_list lists */
|
||||
|
||||
#ifndef TIMEOUT_DISABLE_CALLBACKS
|
||||
struct timeout_cb callback;
|
||||
/* optional callback information */
|
||||
#endif
|
||||
|
||||
#ifndef TIMEOUT_DISABLE_INTERVALS
|
||||
timeout_t interval;
|
||||
/* timeout interval if periodic */
|
||||
#endif
|
||||
|
||||
#ifndef TIMEOUT_DISABLE_RELATIVE_ACCESS
|
||||
struct timeouts *timeouts;
|
||||
/* timeouts collection if member of */
|
||||
#endif
|
||||
}; /* struct timeout */
|
||||
|
||||
|
||||
TIMEOUT_PUBLIC struct timeout *timeout_init(struct timeout *, int);
|
||||
/* initialize timeout structure (same as TIMEOUT_INITIALIZER) */
|
||||
|
||||
#ifndef TIMEOUT_DISABLE_RELATIVE_ACCESS
|
||||
TIMEOUT_PUBLIC bool timeout_pending(struct timeout *);
|
||||
/* true if on timing wheel, false otherwise */
|
||||
|
||||
TIMEOUT_PUBLIC bool timeout_expired(struct timeout *);
|
||||
/* true if on expired queue, false otherwise */
|
||||
|
||||
TIMEOUT_PUBLIC void timeout_del(struct timeout *);
|
||||
/* remove timeout from any timing wheel (okay if not member of any) */
|
||||
#endif
|
||||
|
||||
/*
|
||||
* T I M I N G W H E E L I N T E R F A C E S
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
struct timeouts;
|
||||
|
||||
TIMEOUT_PUBLIC struct timeouts *timeouts_open(timeout_t, timeout_error_t *);
|
||||
/* open a new timing wheel, setting optional HZ (for float conversions) */
|
||||
|
||||
TIMEOUT_PUBLIC void timeouts_close(struct timeouts *);
|
||||
/* destroy timing wheel */
|
||||
|
||||
TIMEOUT_PUBLIC timeout_t timeouts_hz(struct timeouts *);
|
||||
/* return HZ setting (for float conversions) */
|
||||
|
||||
TIMEOUT_PUBLIC void timeouts_update(struct timeouts *, timeout_t);
|
||||
/* update timing wheel with current absolute time */
|
||||
|
||||
TIMEOUT_PUBLIC void timeouts_step(struct timeouts *, timeout_t);
|
||||
/* step timing wheel by relative time */
|
||||
|
||||
TIMEOUT_PUBLIC timeout_t timeouts_timeout(struct timeouts *);
|
||||
/* return interval to next required update */
|
||||
|
||||
TIMEOUT_PUBLIC void timeouts_add(struct timeouts *, struct timeout *, timeout_t);
|
||||
/* add timeout to timing wheel */
|
||||
|
||||
TIMEOUT_PUBLIC void timeouts_del(struct timeouts *, struct timeout *);
|
||||
/* remove timeout from any timing wheel or expired queue (okay if on neither) */
|
||||
|
||||
TIMEOUT_PUBLIC struct timeout *timeouts_get(struct timeouts *);
|
||||
/* return any expired timeout (caller should loop until NULL-return) */
|
||||
|
||||
TIMEOUT_PUBLIC bool timeouts_pending(struct timeouts *);
|
||||
/* return true if any timeouts pending on timing wheel */
|
||||
|
||||
TIMEOUT_PUBLIC bool timeouts_expired(struct timeouts *);
|
||||
/* return true if any timeouts on expired queue */
|
||||
|
||||
TIMEOUT_PUBLIC bool timeouts_check(struct timeouts *, FILE *);
|
||||
/* return true if invariants hold. describes failures to optional file handle. */
|
||||
|
||||
#define TIMEOUTS_PENDING 0x10
|
||||
#define TIMEOUTS_EXPIRED 0x20
|
||||
#define TIMEOUTS_ALL (TIMEOUTS_PENDING|TIMEOUTS_EXPIRED)
|
||||
#define TIMEOUTS_CLEAR 0x40
|
||||
|
||||
#define TIMEOUTS_IT_INITIALIZER(flags) { (flags), 0, 0, 0, 0 }
|
||||
|
||||
#define TIMEOUTS_IT_INIT(cur, _flags) do { \
|
||||
(cur)->flags = (_flags); \
|
||||
(cur)->pc = 0; \
|
||||
} while (0)
|
||||
|
||||
struct timeouts_it {
|
||||
int flags;
|
||||
unsigned pc, i, j;
|
||||
struct timeout *to;
|
||||
}; /* struct timeouts_it */
|
||||
|
||||
TIMEOUT_PUBLIC struct timeout *timeouts_next(struct timeouts *, struct timeouts_it *);
|
||||
/* return next timeout in pending wheel or expired queue. caller can delete
|
||||
* the returned timeout, but should not otherwise manipulate the timing
|
||||
* wheel. in particular, caller SHOULD NOT delete any other timeout as that
|
||||
* could invalidate cursor state and trigger a use-after-free.
|
||||
*/
|
||||
|
||||
#define TIMEOUTS_FOREACH(var, T, flags) \
|
||||
struct timeouts_it _it = TIMEOUTS_IT_INITIALIZER((flags)); \
|
||||
while (((var) = timeouts_next((T), &_it)))
|
||||
|
||||
|
||||
/*
|
||||
* B O N U S W H E E L I N T E R F A C E S
|
||||
*
|
||||
* I usually use floating point timeouts in all my code, but it's cleaner to
|
||||
* separate it to keep the core algorithmic code simple.
|
||||
*
|
||||
* Using macros instead of static inline routines where <math.h> routines
|
||||
* might be used to keep -lm linking optional.
|
||||
*
|
||||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
|
||||
|
||||
#include <math.h> /* ceil(3) */
|
||||
|
||||
#define timeouts_f2i(T, f) \
|
||||
((timeout_t)ceil((f) * timeouts_hz((T)))) /* prefer late expiration over early */
|
||||
|
||||
#define timeouts_i2f(T, i) \
|
||||
((double)(i) / timeouts_hz((T)))
|
||||
|
||||
#define timeouts_addf(T, to, timeout) \
|
||||
timeouts_add((T), (to), timeouts_f2i((T), (timeout)))
|
||||
|
||||
#endif /* TIMEOUT_H */
|
Loading…
Reference in New Issue
Block a user