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Probably broken attempt to improve tor_gettimeofday granularity on windows.

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svn:r4683
This commit is contained in:
Nick Mathewson 2005-08-03 16:28:39 +00:00
parent d90841ff5a
commit 176e9055cc
1 changed files with 22 additions and 1 deletions
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23
src/common/compat.c
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@ -23,6 +23,7 @@ const char compat_c_id[] = "$Id$";
#ifdef MS_WINDOWS
#include <process.h>
#endif
#ifdef HAVE_UNAME
#include <sys/utsname.h>
@ -819,7 +820,27 @@ spawn_exit()
void
tor_gettimeofday(struct timeval *timeval)
{
#ifdef HAVE_GETTIMEOFDAY
#ifdef MS_WINDOWS
/* 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) {
log_fn(LOG_ERR, "System time is before 1970; failing.");
exit(1);
}
ft.ft_64 -= EPOCH_BIAS;
tv->tv_sec = ft.ft_64 / UNITS_PER_SEC;
tv->tv_usec = (ft.ft_64 / UNITS_PER_USEC) % USEC_PER_SEC;
#elif defined(HAVE_GETTIMEOFDAY)
if (gettimeofday(timeval, NULL)) {
log_fn(LOG_ERR, "gettimeofday failed.");
/* If gettimeofday dies, we have either given a bad timezone (we didn't),