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Use absolute time on win32 for DC initialization and errors.

This commit is contained in:
Vincent Wilms 2019-05-10 14:54:17 +02:00
parent ab89d557d5
commit 4671254849
1 changed files with 30 additions and 3 deletions
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33
osal/win32/osal.c
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@ -12,7 +12,7 @@ static double qpc2usec;
#define USECS_PER_SEC 1000000
int osal_gettimeofday (struct timeval *tv, struct timezone *tz)
int osal_getrelativetime(struct timeval *tv, struct timezone *tz)
{
int64_t wintime, usecs;
if(!sysfrequency)
@ -29,6 +29,33 @@ int osal_gettimeofday (struct timeval *tv, struct timezone *tz)
return 1;
}
int osal_gettimeofday(struct timeval *tv, struct timezone *tz)
{
FILETIME system_time;
int64 system_time64, usecs;
/* The offset variable is required to switch from Windows epoch (January 1, 1601) to
* Unix epoch (January 1, 1970). Number of days between both epochs: 134.774
*
* The time returned by GetSystemTimeAsFileTime() changes in 100 ns steps, so the
* following factors are required for the conversion from days to 100 ns steps:
*
* 86.400 seconds per day; 1.000.000 microseconds per second; 10 * 100 ns per microsecond
*/
int64 offset = -134774LL * 86400LL * 1000000LL * 10LL;
GetSystemTimeAsFileTime(&system_time);
system_time64 = ((int64)(system_time.dwHighDateTime) << 32) + (int64)system_time.dwLowDateTime;
system_time64 += offset;
usecs = system_time64 / 10;
tv->tv_sec = (long)(usecs / 1000000);
tv->tv_usec = (long)(usecs - (tv->tv_sec * 1000000));
return 1;
}
ec_timet osal_current_time (void)
{
struct timeval current_time;
@ -58,7 +85,7 @@ void osal_timer_start (osal_timert *self, uint32 timeout_usec)
struct timeval timeout;
struct timeval stop_time;
osal_gettimeofday (&start_time, 0);
osal_getrelativetime (&start_time, 0);
timeout.tv_sec = timeout_usec / USECS_PER_SEC;
timeout.tv_usec = timeout_usec % USECS_PER_SEC;
timeradd (&start_time, &timeout, &stop_time);
@ -73,7 +100,7 @@ boolean osal_timer_is_expired (osal_timert *self)
struct timeval stop_time;
int is_not_yet_expired;
osal_gettimeofday (&current_time, 0);
osal_getrelativetime (&current_time, 0);
stop_time.tv_sec = self->stop_time.sec;
stop_time.tv_usec = self->stop_time.usec;
is_not_yet_expired = timercmp (&current_time, &stop_time, <);