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Reviewed function GetCurrentTime() on WIN32

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raysan5 2015-12-30 13:34:45 +01:00
parent 3b45336929
commit b894a78385
1 changed files with 8 additions and 33 deletions
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41
src/gestures.c
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@ -35,10 +35,9 @@
#include <stdint.h> // Defines int32_t, int64_t
#if defined(_WIN32)
//#define WIN32_LEAN_AND_MEAN
//#include <Windows.h> // ISSUE: Rectangle redeclared, CloseWindow/ShowCursor conflicting types
int __stdcall QueryPerformanceCounter(unsigned long long int *lpPerformanceCount);
int __stdcall QueryPerformanceFrequency(unsigned long long int *lpFrequency);
// Functions required to query time on Windows
int __stdcall QueryPerformanceCounter(unsigned long long int *lpPerformanceCount);
int __stdcall QueryPerformanceFrequency(unsigned long long int *lpFrequency);
#elif defined(__linux)
#include <time.h> // Used for clock functions
#endif
@ -500,38 +499,14 @@ static float VectorDotProduct(Vector2 v1, Vector2 v2)
static double GetCurrentTime()
{
double time = 0;
#if defined(_WIN32)
/*
// NOTE: Requires Windows.h
FILETIME tm;
GetSystemTimePreciseAsFileTime(&tm);
ULONGLONG nowTime = ((ULONGLONG)tm.dwHighDateTime << 32) | (ULONGLONG)tm.dwLowDateTime; // Time provided in 100-nanosecond intervals
unsigned long long int clockFrequency, currentTime;
time = ((double)nowTime/10000000.0); // time in seconds
*/
/*
double pcFreq = 0.0;
__int64 counterStart = 0; // In C99 defined a standard 64-bit integer type named int64_t and unsigned version uint64_t in stdint.h.
QueryPerformanceFrequency(&clockFrequency);
QueryPerformanceCounter(&currentTime);
//int64_t or uint64_t is type defined as long long or unsigned long long in C99's stdint.h.
//LARGE_INTEGER li; // Represents a 64-bit signed integer value
//li.QuadPart // A signed 64-bit integer
unsigned long long int li; // __int64, same as long long
if(!QueryPerformanceFrequency(&li)) return 0;
pcFreq = (double)(li)/1000.0;
QueryPerformanceCounter(&li);
counterStart = li;
unsigned long long int tm;
QueryPerformanceCounter(&tm);
time = (double)(tm - counterStart)/pcFreq;
*/
unsigned long long int tm, tf;
time = (double)(QueryPerformanceCounter(&tm)/QueryPerformanceFrequency(&tf)); // time in seconds
time = (double)currentTime/clockFrequency*1000.0f; // time in miliseconds
#endif
#if defined(__linux)