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Extend b3Clock to expose the system current time in milliseconds. Replace #include time.h with b3Clock.

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This commit is contained in:
Benjamin Ellenberger
2016-11-08 22:16:08 +01:00
parent 1fc36d0a9f
commit a76187fea5
3 changed files with 60 additions and 5 deletions
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54
examples/Utils/b3Clock.cpp
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@@ -47,6 +47,7 @@ struct b3ClockData
#ifdef B3_USE_WINDOWS_TIMERS
LARGE_INTEGER mClockFrequency;
DWORD mStartTick;
LONGLONG mPrevMilliTime;
LONGLONG mPrevElapsedTime;
LARGE_INTEGER mStartTime;
#else
@@ -228,6 +229,59 @@ double b3Clock::getTimeInSeconds()
return double(getTimeMicroseconds()/1.e6);
}
/// Gets the system time in milliseconds
double b3Clock::getSystemTimeMilliseconds() {
#ifdef B3_USE_WINDOWS_TIMERS
LARGE_INTEGER currentTime;
QueryPerformanceCounter(&currentTime);
LONGLONG elapsedTime = currentTime.QuadPart;
// Compute the number of millisecond ticks elapsed.
unsigned long msecTicks = (unsigned long)(1000 * elapsedTime /
m_data->mClockFrequency.QuadPart);
// Check for unexpected leaps in the Win32 performance counter.
// (This is caused by unexpected data across the PCI to ISA
// bridge, aka south bridge. See Microsoft KB274323.)
unsigned long elapsedTicks = GetTickCount();
signed long msecOff = (signed long)(msecTicks - elapsedTicks);
if (msecOff < -100 || msecOff > 100)
{
// Adjust the starting time forwards.
LONGLONG msecAdjustment = b3ClockMin(msecOff *
m_data->mClockFrequency.QuadPart / 1000, elapsedTime -
m_data->mPrevMilliTime);
elapsedTime -= msecAdjustment;
// Recompute the number of millisecond ticks elapsed.
msecTicks = (unsigned long)(1000 * elapsedTime /
m_data->mClockFrequency.QuadPart);
}
// Store the current elapsed time for adjustments next time.
m_data->mPrevMilliTime = elapsedTime;
return msecTicks;
#else
#ifdef __CELLOS_LV2__
uint64_t freq = sys_time_get_timebase_frequency();
double dFreq = ((double)freq) / 1000.0;
typedef uint64_t ClockSize;
ClockSize newTime;
SYS_TIMEBASE_GET(newTime);
//__asm __volatile__( "mftb %0" : "=r" (newTime) : : "memory");
return (unsigned long int)((double(newTime)) / dFreq);
#else
struct timeval currentTime;
gettimeofday(&currentTime, 0);
return (currentTime.tv_sec) * 1000 +
(currentTime.tv_usec) / 1000;
#endif //__CELLOS_LV2__
#endif
}
void b3Clock::usleep(int microSeconds)
{
#ifdef _WIN32