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testtimer: Add basic sanity check for SDL_GetTicks*()

This commit is contained in:
Eddy Jansson 2021-11-02 18:58:06 +01:00 committed by Ryan C. Gordon
parent 8593076da7
commit 4ab7ee1925
1 changed files with 17 additions and 0 deletions
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17
test/testtimer.c
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@ -54,6 +54,23 @@ main(int argc, char *argv[])
return (1); return (1);
} }
/* 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();
SDL_Delay(1);
now64 = SDL_GetTicks64();
now32 = SDL_GetTicks();
Uint32 dt32 = now32-start32;
Uint64 dt64 = now64-start64;
if (dt32 > 100 || dt64 > 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)dt32, (int)dt64);
SDL_Quit();
return 1;
}
}
/* Start the timer */ /* Start the timer */
desired = 0; desired = 0;
if (argv[1]) { if (argv[1]) {