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Convert ticks to 64-bit, added nanosecond precision to the API

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Fixes https://github.com/libsdl-org/SDL/issues/5512
Fixes https://github.com/libsdl-org/SDL/issues/6731
This commit is contained in:
Sam Lantinga
2022-12-02 01:17:17 -08:00
parent 764b899a13
commit 8121bbd083
96 changed files with 938 additions and 1243 deletions
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31
test/testtimer.c
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@@ -37,9 +37,8 @@ int main(int argc, char *argv[])
{
int i, desired;
SDL_TimerID t1, t2, t3;
Uint64 start64, now64;
Uint32 start32, now32;
Uint64 start, now;
Uint64 start_perf, now_perf;
/* Enable standard application logging */
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
@@ -58,13 +57,11 @@ int main(int argc, char *argv[])
/* Verify SDL_GetTicks* acts monotonically increasing, and not erratic. */
SDL_Log("Sanity-checking GetTicks\n");
for (i = 0; i < 1000; ++i) {
start64 = SDL_GetTicks64();
start32 = SDL_GetTicks();
start = SDL_GetTicks();
SDL_Delay(1);
now64 = SDL_GetTicks64() - start64;
now32 = SDL_GetTicks() - start32;
if (now32 > 100 || now64 > 100) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "testtimer.c: Delta time erratic at iter %d. Delay 1ms = %d ms in ticks, %d ms in ticks64\n", i, (int)now32, (int)now64);
now = SDL_GetTicks() - start;
if (now > 100) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "testtimer.c: Delta time erratic at iter %d. Delay 1ms = %d ms in ticks\n", i, (int)now);
SDL_Quit();
return 1;
}
@@ -120,22 +117,20 @@ int main(int argc, char *argv[])
SDL_RemoveTimer(t2);
SDL_RemoveTimer(t3);
start = SDL_GetPerformanceCounter();
start_perf = SDL_GetPerformanceCounter();
for (i = 0; i < 1000000; ++i) {
ticktock(0, NULL);
}
now = SDL_GetPerformanceCounter();
SDL_Log("1 million iterations of ticktock took %f ms\n", (double)((now - start) * 1000) / SDL_GetPerformanceFrequency());
now_perf = SDL_GetPerformanceCounter();
SDL_Log("1 million iterations of ticktock took %f ms\n", (double)((now_perf - start_perf) * 1000) / SDL_GetPerformanceFrequency());
SDL_Log("Performance counter frequency: %" SDL_PRIu64 "\n", SDL_GetPerformanceFrequency());
start64 = SDL_GetTicks64();
start32 = SDL_GetTicks();
start = SDL_GetPerformanceCounter();
start = SDL_GetTicks();
start_perf = SDL_GetPerformanceCounter();
SDL_Delay(1000);
now = SDL_GetPerformanceCounter();
now64 = SDL_GetTicks64();
now32 = SDL_GetTicks();
SDL_Log("Delay 1 second = %d ms in ticks, %d ms in ticks64, %f ms according to performance counter\n", (int)(now32 - start32), (int)(now64 - start64), (double)((now - start) * 1000) / SDL_GetPerformanceFrequency());
now_perf = SDL_GetPerformanceCounter();
now = SDL_GetTicks();
SDL_Log("Delay 1 second = %d ms in ticks, %f ms according to performance counter\n", (int)(now - start), (double)((now_perf - start_perf) * 1000) / SDL_GetPerformanceFrequency());
SDL_Quit();
return 0;