Corrected header file documentation comment.

2025-05-24 21:49:10 +00:00 · 2014-11-22 22:20:40 +01:00 · 2014-11-22 22:20:40 +01:00 · 9c398852e6
commit 9c398852e6
1896 changed files with 489150 additions and 0 deletions
--- a/test/testtimer.c
+++ b/test/testtimer.c
@ -0,0 +1,122 @@
+/*
+  Copyright (C) 1997-2014 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;
+    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);
+    }
+
+    /* Start the timer */
+    desired = 0;
+    if (argv[1]) {
+        desired = 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: %llu\n", (unsigned long long) SDL_GetPerformanceFrequency());
+    start32 = SDL_GetTicks();
+    start = SDL_GetPerformanceCounter();
+    SDL_Delay(1000);
+    now = SDL_GetPerformanceCounter();
+    now32 = SDL_GetTicks();
+    SDL_Log("Delay 1 second = %d ms in ticks, %f ms according to performance counter\n", (now32-start32), (double)((now - start)*1000) / SDL_GetPerformanceFrequency());
+
+    SDL_Quit();
+    return (0);
+}
+
+/* vi: set ts=4 sw=4 expandtab: */