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Changed Linux timestamp behavior. Explicitly using CLOCK_MONOTONIC_RAW and CLOCK_REALTIME

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This commit is contained in:
Matt Hill
2015-03-16 22:12:37 -04:00
parent f7ed84d5db
commit 39c4756ce7
20 changed files with 120 additions and 79 deletions
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78
src/openalpr/support/timing.cpp
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@@ -71,11 +71,24 @@ namespace alpr
return (0);
}
void getTime(timespec* time)
void getTimeMonotonic(timespec* time)
{
clock_gettime(0, time);
}
long getTimeMonotonicMs()
{
timespec time;
getTimeMonotonic(&time);
timespec time_start;
time_start.tv_sec = 0;
time_start.tv_nsec = 0;
return diffclock(time_start, time);
}
double diffclock(timespec time1,timespec time2)
{
timespec delta = diff(time1,time2);
@@ -101,26 +114,48 @@ namespace alpr
}
long getEpochTime()
long getEpochTimeMs()
{
return std::time(0) * 1000;
}
#else
void getTime(timespec* time)
void _getTime(bool realtime, timespec* time)
{
#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
time->tv_sec = mts.tv_sec;
time->tv_nsec = mts.tv_nsec;
#else
clock_gettime(CLOCK_MONOTONIC, time);
#endif
#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
time->tv_sec = mts.tv_sec;
time->tv_nsec = mts.tv_nsec;
#else
if (realtime)
clock_gettime(CLOCK_REALTIME, time);
else
clock_gettime(CLOCK_MONOTONIC, time);
#endif
}
// Returns a monotonic clock time unaffected by time changes (e.g., NTP)
// Useful for interval comparisons
void getTimeMonotonic(timespec* time)
{
_getTime(false, time);
}
long getTimeMonotonicMs()
{
timespec time;
getTimeMonotonic(&time);
timespec time_start;
time_start.tv_sec = 0;
time_start.tv_nsec = 0;
return diffclock(time_start, time);
}
double diffclock(timespec time1,timespec time2)
@@ -148,13 +183,18 @@ namespace alpr
}
long getEpochTime()
// Returns wall clock time since Unix epoch (Jan 1, 1970)
long getEpochTimeMs()
{
struct timeval tp;
gettimeofday(&tp, NULL);
long ms = tp.tv_sec * 1000 + tp.tv_usec / 1000;
timespec time;
_getTime(true, &time);
timespec epoch_start;
epoch_start.tv_sec = 0;
epoch_start.tv_nsec = 0;
return diffclock(epoch_start, time);
return ms;
}
#endif