72 lines
2.0 KiB
C
72 lines
2.0 KiB
C
/*************************************************************************
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*
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* Orca
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* Copyright 2023 Martin Fouilleul and the Orca project contributors
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* See LICENSE.txt for licensing information
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*
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**************************************************************************/
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#include <profileapi.h>
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#include "platform_clock.h"
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#include "util/typedefs.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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static u64 __performanceCounterFreq = 0;
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const u64 WIN_EPOCH_TO_UNIX_EPOCH_100NS = 116444736000000000; // number of 100ns from Jan 1, 1601 (windows epoch) to Jan 1, 1970 (unix epoch)
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void oc_clock_init()
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{
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LARGE_INTEGER freq;
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QueryPerformanceFrequency(&freq);
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__performanceCounterFreq = freq.QuadPart;
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}
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f64 oc_clock_time(oc_clock_kind clock)
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{
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switch(clock)
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{
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case OC_CLOCK_MONOTONIC:
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{
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LARGE_INTEGER counter;
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QueryPerformanceCounter(&counter);
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f64 time = __performanceCounterFreq ? (counter.QuadPart / (f64)__performanceCounterFreq) : 0;
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return (time);
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}
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case OC_CLOCK_UPTIME:
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{
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LONGLONG unbiasedTime100Ns;
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if(QueryUnbiasedInterruptTime(&unbiasedTime100Ns))
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{
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f64 unbiasedTimeSecs = ((f64)unbiasedTime100Ns) / (10 * 1000 * 1000);
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return unbiasedTimeSecs;
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}
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oc_log_error("OC_CLOCK_UPTIME syscall failed with error: %d", GetLastError());
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return 0;
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}
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case OC_CLOCK_DATE:
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{
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FILETIME ft;
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GetSystemTimeAsFileTime(&ft);
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u64 systemTime100Ns = ((u64)ft.dwHighDateTime << 32) | (u64)ft.dwLowDateTime;
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u64 timestamp100Ns = systemTime100Ns - WIN_EPOCH_TO_UNIX_EPOCH_100NS;
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f64 timeSecs = ((f64)timestamp100Ns) / (10 * 1000 * 1000);
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return timeSecs;
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}
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}
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return 0.0;
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}
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#ifdef __cplusplus
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} // extern "C"
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#endif
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