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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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