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Optimizations, switching CanImplicitlyCast method, new CPU rate checker

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This commit is contained in:
Brian Fiete 2019-11-19 09:58:35 -08:00
parent 39fd8d2624
commit 098ad1ce55
25 changed files with 759 additions and 301 deletions
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43
BeefySysLib/platform/win/Platform.cpp
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@ -909,8 +909,25 @@ static void __cdecl AbortHandler(int)
BfpSystem_FatalError("Abort handler", NULL);
}
static int64 gCPUFreq = -1;
static int64 gStartCPUTick = -1;
static int64 gStartQPF = -1;
static void InitCPUFreq()
{
if (gStartCPUTick == -1)
{
gStartCPUTick = __rdtsc();
LARGE_INTEGER largeVal = { 0 };
QueryPerformanceCounter(&largeVal);
gStartQPF = largeVal.QuadPart;
}
}
BFP_EXPORT void BFP_CALLTYPE BfpSystem_Init(int version, BfpSystemInitFlags flags)
{
InitCPUFreq();
::_set_error_mode(_OUT_TO_STDERR);
#ifdef _DEBUG
@ -1123,10 +1140,28 @@ BFP_EXPORT int64 BFP_CALLTYPE BfpSystem_GetCPUTick()
}
BFP_EXPORT int64 BFP_CALLTYPE BfpSystem_GetCPUTickFreq()
{
LARGE_INTEGER freq = { 0 };
QueryPerformanceFrequency(&freq);
return freq.QuadPart;
{
LARGE_INTEGER largeVal = { 0 };
QueryPerformanceFrequency(&largeVal);
int64 qpfFreq = largeVal.QuadPart;
if (gStartCPUTick == -1)
{
InitCPUFreq();
Sleep(10);
}
int64 cpuTick1 = __rdtsc();
QueryPerformanceCounter(&largeVal);
int64 slowTick1 = largeVal.QuadPart;
int64 cpuElapsed = cpuTick1 - gStartCPUTick;
int64 slowElapsed = slowTick1 - gStartQPF;
double elapsedSeconds = slowElapsed / (double)qpfFreq;
int64 freq = (int64)(cpuElapsed / elapsedSeconds);
gCPUFreq = freq;
return gCPUFreq;
}
BFP_EXPORT void BFP_CALLTYPE BfpSystem_CreateGUID(BfpGUID* outGuid)