#include "il2cpp-config.h"
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#if IL2CPP_TARGET_WINDOWS
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#include "os/Time.h"
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#include "os/Win32/WindowsHeaders.h"
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#include "utils/MathUtils.h"
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#define MTICKS_PER_SEC 10000000LL
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namespace il2cpp
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{
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namespace os
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{
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static LARGE_INTEGER s_PerformanceCounterFrequency;
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static inline void InitializePerformanceCounterFrequency()
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{
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if (!s_PerformanceCounterFrequency.QuadPart)
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{
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// From MSDN: On systems that run Windows XP or later, the function will always succeed and will thus never return zero.
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// so I'll just assume we never run on older than XP
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BOOL qpfResult = QueryPerformanceFrequency(&s_PerformanceCounterFrequency);
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IL2CPP_ASSERT(qpfResult != FALSE);
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}
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}
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uint32_t Time::GetTicksMillisecondsMonotonic()
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{
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InitializePerformanceCounterFrequency();
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LARGE_INTEGER value;
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QueryPerformanceCounter(&value);
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return static_cast<uint32_t>(value.QuadPart * 1000 / s_PerformanceCounterFrequency.QuadPart);
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}
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int64_t Time::GetTicks100NanosecondsMonotonic()
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{
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InitializePerformanceCounterFrequency();
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LARGE_INTEGER value;
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QueryPerformanceCounter(&value);
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return utils::MathUtils::A_Times_B_DividedBy_C(value.QuadPart, MTICKS_PER_SEC, s_PerformanceCounterFrequency.QuadPart);
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}
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/*
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* Magic number to convert FILETIME base Jan 1, 1601 to DateTime - base Jan, 1, 0001
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*/
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const uint64_t FILETIME_ADJUST = ((uint64_t)504911232000000000LL);
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int64_t Time::GetTicks100NanosecondsDateTime()
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{
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ULARGE_INTEGER ft;
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IL2CPP_ASSERT(sizeof(ft) == sizeof(FILETIME));
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::GetSystemTimeAsFileTime((FILETIME*)&ft);
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return FILETIME_ADJUST + ft.QuadPart;
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}
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int64_t Time::GetSystemTimeAsFileTime()
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{
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int64_t fileTime;
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::GetSystemTimeAsFileTime(reinterpret_cast<FILETIME*>(&fileTime));
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return fileTime;
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}
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}
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}
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#endif
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