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- /* Copyright (c) 2003-2004, Roger Dingledine
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2018, The Tor Project, Inc. */
- /* See LICENSE for licensing information */
- /**
- * \file compat_time.c
- * \brief Portable wrappers for finding out the current time, running
- * timers, etc.
- **/
- #include "orconfig.h"
- #include "lib/err/torerr.h"
- #include "lib/wallclock/tor_gettimeofday.h"
- #include "lib/cc/torint.h"
- #include <stddef.h>
- #include <stdlib.h>
- #ifdef HAVE_SYS_TIME_H
- #include <sys/time.h>
- #endif
- #ifdef _WIN32
- #include <windows.h>
- #endif
- #ifdef HAVE_SYS_TYPES_H
- #include <sys/types.h>
- #endif
- #ifndef HAVE_GETTIMEOFDAY
- #ifdef HAVE_FTIME
- #include <sys/timeb.h>
- #endif
- #endif
- /** Set *timeval to the current time of day. On error, log and terminate.
- * (Same as gettimeofday(timeval,NULL), but never returns -1.)
- */
- MOCK_IMPL(void,
- tor_gettimeofday, (struct timeval *timeval))
- {
- #ifdef _WIN32
- /* Epoch bias copied from perl: number of units between windows epoch and
- * Unix epoch. */
- #define EPOCH_BIAS UINT64_C(116444736000000000)
- #define UNITS_PER_SEC UINT64_C(10000000)
- #define USEC_PER_SEC UINT64_C(1000000)
- #define UNITS_PER_USEC UINT64_C(10)
- union {
- uint64_t ft_64;
- FILETIME ft_ft;
- } ft;
- /* number of 100-nsec units since Jan 1, 1601 */
- GetSystemTimeAsFileTime(&ft.ft_ft);
- if (ft.ft_64 < EPOCH_BIAS) {
- /* LCOV_EXCL_START */
- raw_assert_unreached_msg("System time is before 1970; failing.");
- /* LCOV_EXCL_STOP */
- }
- ft.ft_64 -= EPOCH_BIAS;
- timeval->tv_sec = (unsigned) (ft.ft_64 / UNITS_PER_SEC);
- timeval->tv_usec = (unsigned) ((ft.ft_64 / UNITS_PER_USEC) % USEC_PER_SEC);
- #elif defined(HAVE_GETTIMEOFDAY)
- if (gettimeofday(timeval, NULL)) {
- /* LCOV_EXCL_START */
- /* If gettimeofday dies, we have either given a bad timezone (we didn't),
- or segfaulted.*/
- raw_assert_unreached_msg("gettimeofday failed");
- /* LCOV_EXCL_STOP */
- }
- #elif defined(HAVE_FTIME)
- struct timeb tb;
- ftime(&tb);
- timeval->tv_sec = tb.time;
- timeval->tv_usec = tb.millitm * 1000;
- #else
- #error "No way to get time."
- #endif /* defined(_WIN32) || ... */
- return;
- }
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