mirror of
https://github.com/libretro/NP2kai.git
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100 lines
2.3 KiB
C
Executable File
100 lines
2.3 KiB
C
Executable File
#if defined(SUPPORT_NP2_TICKCOUNT)
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#include <np2_tickcount.h>
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#include <time.h>
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#if defined(NP2_WIN)
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#include <windows.h>
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#elif defined(NP2_SDL)
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#include <SDL.h>
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#elif defined(__LIBRETRO__)
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#include <features/features_cpu.h>
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#endif
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static int64_t initcount;
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#if defined(__LIBRETRO__)
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static int64_t inittime;
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static int64_t lastcount;
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static int64_t lasttime;
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#endif
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int64_t NP2_TickCount_GetCount(void) {
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#if defined(NP2_WIN)
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LARGE_INTEGER count;
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QueryPerformanceCounter(&count);
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return count.QuadPart;
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#elif defined(NP2_SDL)
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#if SDL_MAJOR_VERSION == 1
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return SDL_GetTicks();
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#else
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return SDL_GetPerformanceCounter();
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#endif
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#elif defined(__LIBRETRO__)
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lastcount = cpu_features_get_perf_counter();
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lasttime = cpu_features_get_time_usec();
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return lastcount;
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#else
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return ts.tv_sec * 1000000000 + ts.tv_nsec;
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#endif
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}
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int64_t NP2_TickCount_GetFrequency(void) {
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#if defined(NP2_WIN)
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LARGE_INTEGER freq;
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QueryPerformanceFrequency(&freq);
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return freq.QuadPart;
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#elif defined(NP2_SDL)
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#if SDL_MAJOR_VERSION == 1
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return 100000000;
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#else
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return SDL_GetPerformanceFrequency();
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#endif
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#elif defined(__LIBRETRO__)
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int64_t nowcount = cpu_features_get_perf_counter();
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int64_t nowtime = cpu_features_get_time_usec();
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int64_t ret;
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if(nowtime > lasttime) {
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ret = ((nowcount - lastcount) / (nowtime - lasttime)) * 1000000;
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} else {
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ret = 0;
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}
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lastcount = nowtime;
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lasttime = nowtime;
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return ret;
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#else
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struct timespec res;
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clock_getres(CLOCK_MONOTONIC, &res);
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return 1000000000 / (res.tv_sec * 1000000000 + res.tv_nsec);
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#endif
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}
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void NP2_TickCount_Initialize(void) {
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initcount = NP2_TickCount_GetCount();
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#if defined(__LIBRETRO__)
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inittime = cpu_features_get_time_usec();
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lastcount = initcount;
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lasttime = inittime;
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#endif
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}
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int64_t NP2_TickCount_GetCountFromInit(void) {
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return NP2_TickCount_GetCount() - initcount;
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}
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#if !defined(_WINDOWS) && defined(SUPPORT_NP2_TICKCOUNT)
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BOOL QueryPerformanceCounter(LARGE_INTEGER* count) {
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int64_t icount = NP2_TickCount_GetCount();
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COPY64(count, &icount);
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return TRUE;
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}
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BOOL QueryPerformanceFrequency(LARGE_INTEGER* freq) {
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int64_t ifreq = NP2_TickCount_GetFrequency();
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COPY64(freq, &ifreq);
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return TRUE;
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}
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#endif
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#endif // SUPPORT_NP2_TICKCOUNT
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