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122 lines
3.4 KiB
122 lines
3.4 KiB
/* |
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org> |
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This software is provided 'as-is', without any express or implied |
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warranty. In no event will the authors be held liable for any damages |
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arising from the use of this software. |
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Permission is granted to anyone to use this software for any purpose, |
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including commercial applications, and to alter it and redistribute it |
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freely. |
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*/ |
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/* Test program to check the resolution of the SDL timer on the current |
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platform |
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*/ |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include "SDL.h" |
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#define DEFAULT_RESOLUTION 1 |
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static int ticks = 0; |
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static Uint32 SDLCALL |
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ticktock(Uint32 interval, void *param) |
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{ |
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++ticks; |
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return (interval); |
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} |
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static Uint32 SDLCALL |
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callback(Uint32 interval, void *param) |
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{ |
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SDL_Log("Timer %d : param = %d\n", interval, (int) (uintptr_t) param); |
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return interval; |
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} |
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int |
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main(int argc, char *argv[]) |
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{ |
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int i, desired; |
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SDL_TimerID t1, t2, t3; |
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Uint32 start32, now32; |
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Uint64 start, now; |
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/* Enable standard application logging */ |
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SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); |
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if (SDL_Init(SDL_INIT_TIMER) < 0) { |
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError()); |
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return (1); |
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} |
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/* Start the timer */ |
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desired = 0; |
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if (argv[1]) { |
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desired = atoi(argv[1]); |
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} |
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if (desired == 0) { |
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desired = DEFAULT_RESOLUTION; |
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} |
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t1 = SDL_AddTimer(desired, ticktock, NULL); |
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/* Wait 10 seconds */ |
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SDL_Log("Waiting 10 seconds\n"); |
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SDL_Delay(10 * 1000); |
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/* Stop the timer */ |
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SDL_RemoveTimer(t1); |
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/* Print the results */ |
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if (ticks) { |
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SDL_Log("Timer resolution: desired = %d ms, actual = %f ms\n", |
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desired, (double) (10 * 1000) / ticks); |
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} |
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/* Test multiple timers */ |
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SDL_Log("Testing multiple timers...\n"); |
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t1 = SDL_AddTimer(100, callback, (void *) 1); |
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if (!t1) |
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,"Could not create timer 1: %s\n", SDL_GetError()); |
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t2 = SDL_AddTimer(50, callback, (void *) 2); |
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if (!t2) |
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,"Could not create timer 2: %s\n", SDL_GetError()); |
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t3 = SDL_AddTimer(233, callback, (void *) 3); |
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if (!t3) |
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,"Could not create timer 3: %s\n", SDL_GetError()); |
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/* Wait 10 seconds */ |
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SDL_Log("Waiting 10 seconds\n"); |
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SDL_Delay(10 * 1000); |
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SDL_Log("Removing timer 1 and waiting 5 more seconds\n"); |
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SDL_RemoveTimer(t1); |
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SDL_Delay(5 * 1000); |
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SDL_RemoveTimer(t2); |
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SDL_RemoveTimer(t3); |
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start = SDL_GetPerformanceCounter(); |
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for (i = 0; i < 1000000; ++i) { |
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ticktock(0, NULL); |
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} |
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now = SDL_GetPerformanceCounter(); |
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SDL_Log("1 million iterations of ticktock took %f ms\n", (double)((now - start)*1000) / SDL_GetPerformanceFrequency()); |
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SDL_Log("Performance counter frequency: %"SDL_PRIu64"\n", (unsigned long long) SDL_GetPerformanceFrequency()); |
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start32 = SDL_GetTicks(); |
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start = SDL_GetPerformanceCounter(); |
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SDL_Delay(1000); |
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now = SDL_GetPerformanceCounter(); |
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now32 = SDL_GetTicks(); |
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SDL_Log("Delay 1 second = %d ms in ticks, %f ms according to performance counter\n", (now32-start32), (double)((now - start)*1000) / SDL_GetPerformanceFrequency()); |
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SDL_Quit(); |
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return (0); |
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} |
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/* vi: set ts=4 sw=4 expandtab: */
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