Mercurial > sdl-ios-xcode
view test/testsem.c @ 3566:07c8339c95c6
Fixed bug #905
Give the foreign window message proc more control over Windows events.
This may need to be adjusted when we add the capability for the app to specify whether it wants SDL to handle input for the window or not.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 15 Dec 2009 09:20:10 +0000 |
parents | c121d94672cb |
children | d547877e355e |
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/* Simple test of the SDL semaphore code */ #include <stdio.h> #include <stdlib.h> #include <signal.h> #include "SDL.h" #include "SDL_thread.h" #define NUM_THREADS 10 static SDL_sem *sem; int alive = 1; int SDLCALL ThreadFunc(void *data) { int threadnum = (int) (uintptr_t) data; while (alive) { SDL_SemWait(sem); fprintf(stderr, "Thread number %d has got the semaphore (value = %d)!\n", threadnum, SDL_SemValue(sem)); SDL_Delay(200); SDL_SemPost(sem); fprintf(stderr, "Thread number %d has released the semaphore (value = %d)!\n", threadnum, SDL_SemValue(sem)); SDL_Delay(1); /* For the scheduler */ } printf("Thread number %d exiting.\n", threadnum); return 0; } static void killed(int sig) { alive = 0; } int main(int argc, char **argv) { SDL_Thread *threads[NUM_THREADS]; uintptr_t i; int init_sem; if (argc < 2) { fprintf(stderr, "Usage: %s init_value\n", argv[0]); return (1); } /* Load the SDL library */ if (SDL_Init(0) < 0) { fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); return (1); } signal(SIGTERM, killed); signal(SIGINT, killed); init_sem = atoi(argv[1]); sem = SDL_CreateSemaphore(init_sem); printf("Running %d threads, semaphore value = %d\n", NUM_THREADS, init_sem); /* Create all the threads */ for (i = 0; i < NUM_THREADS; ++i) { threads[i] = SDL_CreateThread(ThreadFunc, (void *) i); } /* Wait 10 seconds */ SDL_Delay(10 * 1000); /* Wait for all threads to finish */ printf("Waiting for threads to finish\n"); alive = 0; for (i = 0; i < NUM_THREADS; ++i) { SDL_WaitThread(threads[i], NULL); } printf("Finished waiting for threads\n"); SDL_DestroySemaphore(sem); SDL_Quit(); return (0); }