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- /* Copyright (c) 2003-2004, Roger Dingledine
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2016, 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.
- **/
- #define COMPAT_PRIVATE
- #include "compat.h"
- #ifdef _WIN32
- #include <winsock2.h>
- #include <windows.h>
- #endif
- #ifdef HAVE_SYS_TYPES_H
- #include <sys/types.h>
- #endif
- #ifdef HAVE_UNISTD_H
- #include <unistd.h>
- #endif
- #ifdef TOR_UNIT_TESTS
- #if !defined(HAVE_USLEEP) && defined(HAVE_SYS_SELECT_H)
- /* as fallback implementation for tor_sleep_msec */
- #include <sys/select.h>
- #endif
- #endif
- #include "torlog.h"
- #include "util.h"
- #include "container.h"
- #ifndef HAVE_GETTIMEOFDAY
- #ifdef HAVE_FTIME
- #include <sys/timeb.h>
- #endif
- #endif
- #ifdef TOR_UNIT_TESTS
- /** Delay for <b>msec</b> milliseconds. Only used in tests. */
- void
- tor_sleep_msec(int msec)
- {
- #ifdef _WIN32
- Sleep(msec);
- #elif defined(HAVE_USLEEP)
- sleep(msec / 1000);
- /* Some usleep()s hate sleeping more than 1 sec */
- usleep((msec % 1000) * 1000);
- #elif defined(HAVE_SYS_SELECT_H)
- struct timeval tv = { msec / 1000, (msec % 1000) * 1000};
- select(0, NULL, NULL, NULL, &tv);
- #else
- sleep(CEIL_DIV(msec, 1000));
- #endif
- }
- #endif
- /** Set *timeval to the current time of day. On error, log and terminate.
- * (Same as gettimeofday(timeval,NULL), but never returns -1.)
- */
- 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 U64_LITERAL(116444736000000000)
- #define UNITS_PER_SEC U64_LITERAL(10000000)
- #define USEC_PER_SEC U64_LITERAL(1000000)
- #define UNITS_PER_USEC U64_LITERAL(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 */
- log_err(LD_GENERAL,"System time is before 1970; failing.");
- exit(1);
- /* 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 */
- log_err(LD_GENERAL,"gettimeofday failed.");
- /* If gettimeofday dies, we have either given a bad timezone (we didn't),
- or segfaulted.*/
- exit(1);
- /* 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
- return;
- }
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