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83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/* Copyright (c) 2003-2004, Roger Dingledine
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* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
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* Copyright (c) 2007-2018, 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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#include "orconfig.h"
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#include "lib/err/torerr.h"
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#include "lib/wallclock/tor_gettimeofday.h"
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#include "lib/cc/torint.h"
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#include <stddef.h>
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#include <stdlib.h>
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifdef _WIN32
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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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#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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/** 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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MOCK_IMPL(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 UINT64_C(116444736000000000)
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#define UNITS_PER_SEC UINT64_C(10000000)
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#define USEC_PER_SEC UINT64_C(1000000)
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#define UNITS_PER_USEC UINT64_C(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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raw_assert_unreached_msg("System time is before 1970; failing.");
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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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/* If gettimeofday dies, we have either given a bad timezone (we didn't),
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or segfaulted.*/
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raw_assert_unreached_msg("gettimeofday failed");
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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 /* defined(_WIN32) || ... */
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return;
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}
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