mirror of
https://gitlab.torproject.org/tpo/core/tor.git
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111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
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/* Copyright (c) 2003-2004, Roger Dingledine
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2016, The Tor Project, Inc. */
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/* See LICENSE for licensing information */
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/**
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* \file compat_time.c
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* \brief Portable wrappers for finding out the current time, running
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* timers, etc.
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**/
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#define COMPAT_PRIVATE
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#include "compat.h"
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#ifdef _WIN32
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#include <winsock2.h>
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#include <windows.h>
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef TOR_UNIT_TESTS
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#if !defined(HAVE_USLEEP) && defined(HAVE_SYS_SELECT_H)
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/* as fallback implementation for tor_sleep_msec */
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#include <sys/select.h>
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#endif
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#endif
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#include "torlog.h"
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#include "util.h"
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#include "container.h"
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#ifndef HAVE_GETTIMEOFDAY
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#ifdef HAVE_FTIME
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#include <sys/timeb.h>
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#endif
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#endif
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#ifdef TOR_UNIT_TESTS
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/** Delay for <b>msec</b> milliseconds. Only used in tests. */
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void
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tor_sleep_msec(int msec)
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{
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#ifdef _WIN32
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Sleep(msec);
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#elif defined(HAVE_USLEEP)
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sleep(msec / 1000);
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/* Some usleep()s hate sleeping more than 1 sec */
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usleep((msec % 1000) * 1000);
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#elif defined(HAVE_SYS_SELECT_H)
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struct timeval tv = { msec / 1000, (msec % 1000) * 1000};
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select(0, NULL, NULL, NULL, &tv);
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#else
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sleep(CEIL_DIV(msec, 1000));
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#endif
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}
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#endif
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/** Set *timeval to the current time of day. On error, log and terminate.
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* (Same as gettimeofday(timeval,NULL), but never returns -1.)
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*/
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void
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tor_gettimeofday(struct timeval *timeval)
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{
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#ifdef _WIN32
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/* Epoch bias copied from perl: number of units between windows epoch and
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* Unix epoch. */
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#define EPOCH_BIAS U64_LITERAL(116444736000000000)
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#define UNITS_PER_SEC U64_LITERAL(10000000)
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#define USEC_PER_SEC U64_LITERAL(1000000)
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#define UNITS_PER_USEC U64_LITERAL(10)
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union {
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uint64_t ft_64;
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FILETIME ft_ft;
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} ft;
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/* number of 100-nsec units since Jan 1, 1601 */
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GetSystemTimeAsFileTime(&ft.ft_ft);
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if (ft.ft_64 < EPOCH_BIAS) {
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/* LCOV_EXCL_START */
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log_err(LD_GENERAL,"System time is before 1970; failing.");
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exit(1);
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/* LCOV_EXCL_STOP */
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}
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ft.ft_64 -= EPOCH_BIAS;
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timeval->tv_sec = (unsigned) (ft.ft_64 / UNITS_PER_SEC);
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timeval->tv_usec = (unsigned) ((ft.ft_64 / UNITS_PER_USEC) % USEC_PER_SEC);
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#elif defined(HAVE_GETTIMEOFDAY)
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if (gettimeofday(timeval, NULL)) {
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/* LCOV_EXCL_START */
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log_err(LD_GENERAL,"gettimeofday failed.");
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/* If gettimeofday dies, we have either given a bad timezone (we didn't),
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or segfaulted.*/
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exit(1);
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/* LCOV_EXCL_STOP */
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}
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#elif defined(HAVE_FTIME)
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struct timeb tb;
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ftime(&tb);
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timeval->tv_sec = tb.time;
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timeval->tv_usec = tb.millitm * 1000;
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#else
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#error "No way to get time."
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#endif
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return;
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}
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