146 lines
4.2 KiB
C
Executable file
146 lines
4.2 KiB
C
Executable file
/*
|
|
Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
|
|
|
|
This software is provided 'as-is', without any express or implied
|
|
warranty. In no event will the authors be held liable for any damages
|
|
arising from the use of this software.
|
|
|
|
Permission is granted to anyone to use this software for any purpose,
|
|
including commercial applications, and to alter it and redistribute it
|
|
freely.
|
|
*/
|
|
|
|
/* Test program to check the resolution of the SDL timer on the current
|
|
platform
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
#include "SDL.h"
|
|
|
|
#define DEFAULT_RESOLUTION 1
|
|
|
|
static int ticks = 0;
|
|
|
|
static Uint32 SDLCALL
|
|
ticktock(Uint32 interval, void *param)
|
|
{
|
|
++ticks;
|
|
return (interval);
|
|
}
|
|
|
|
static Uint32 SDLCALL
|
|
callback(Uint32 interval, void *param)
|
|
{
|
|
SDL_Log("Timer %d : param = %d\n", interval, (int) (uintptr_t) param);
|
|
return interval;
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int i, desired;
|
|
SDL_TimerID t1, t2, t3;
|
|
Uint64 start64, now64;
|
|
Uint32 start32, now32;
|
|
Uint64 start, now;
|
|
|
|
/* Enable standard application logging */
|
|
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
|
|
|
|
if (SDL_Init(SDL_INIT_TIMER) < 0) {
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
|
|
return (1);
|
|
}
|
|
|
|
if (SDL_getenv("SDL_TESTS_QUICK") != NULL) {
|
|
SDL_Log("Not running slower tests");
|
|
SDL_Quit();
|
|
return 0;
|
|
}
|
|
|
|
/* 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() - 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);
|
|
SDL_Quit();
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* Start the timer */
|
|
desired = 0;
|
|
if (argv[1]) {
|
|
desired = SDL_atoi(argv[1]);
|
|
}
|
|
if (desired == 0) {
|
|
desired = DEFAULT_RESOLUTION;
|
|
}
|
|
t1 = SDL_AddTimer(desired, ticktock, NULL);
|
|
|
|
/* Wait 10 seconds */
|
|
SDL_Log("Waiting 10 seconds\n");
|
|
SDL_Delay(10 * 1000);
|
|
|
|
/* Stop the timer */
|
|
SDL_RemoveTimer(t1);
|
|
|
|
/* Print the results */
|
|
if (ticks) {
|
|
SDL_Log("Timer resolution: desired = %d ms, actual = %f ms\n",
|
|
desired, (double) (10 * 1000) / ticks);
|
|
}
|
|
|
|
/* Test multiple timers */
|
|
SDL_Log("Testing multiple timers...\n");
|
|
t1 = SDL_AddTimer(100, callback, (void *) 1);
|
|
if (!t1)
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,"Could not create timer 1: %s\n", SDL_GetError());
|
|
t2 = SDL_AddTimer(50, callback, (void *) 2);
|
|
if (!t2)
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,"Could not create timer 2: %s\n", SDL_GetError());
|
|
t3 = SDL_AddTimer(233, callback, (void *) 3);
|
|
if (!t3)
|
|
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION,"Could not create timer 3: %s\n", SDL_GetError());
|
|
|
|
/* Wait 10 seconds */
|
|
SDL_Log("Waiting 10 seconds\n");
|
|
SDL_Delay(10 * 1000);
|
|
|
|
SDL_Log("Removing timer 1 and waiting 5 more seconds\n");
|
|
SDL_RemoveTimer(t1);
|
|
|
|
SDL_Delay(5 * 1000);
|
|
|
|
SDL_RemoveTimer(t2);
|
|
SDL_RemoveTimer(t3);
|
|
|
|
start = 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());
|
|
|
|
SDL_Log("Performance counter frequency: %"SDL_PRIu64"\n", SDL_GetPerformanceFrequency());
|
|
start64 = SDL_GetTicks64();
|
|
start32 = SDL_GetTicks();
|
|
start = 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());
|
|
|
|
SDL_Quit();
|
|
return (0);
|
|
}
|
|
|
|
/* vi: set ts=4 sw=4 expandtab: */
|