Mercurial > sdl-ios-xcode
view test/testlock.c @ 939:c7c04f811994
Date: Tue, 01 Jun 2004 15:27:44 +0300
From: Martin_Storsj
Subject: Update for dynamic loading of ALSA
I sent you a patch a few months ago which enables SDL to load ALSA
dynamically. Now I've finally got time to tweak this yet some more. I've
added code from alsa.m4 (from alsa's dev package) to acinclude.m4, and
made the detection of the alsa library name a bit better. I've also
fixed up the loading versioned symbols with dlvsym, so that it falls
back to dlsym.
I wouldn't say the configure script is complete yet, but this is how far
I've come this time, and I'm no expert at those things.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sat, 21 Aug 2004 04:20:00 +0000 |
parents | 74212992fb08 |
children | be9c9c8f6d53 |
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/* Test the thread and mutex locking functions Also exercises the system's signal/thread interaction */ #include <signal.h> #include <stdio.h> #include <stdlib.h> #include "SDL.h" #include "SDL_mutex.h" #include "SDL_thread.h" static SDL_mutex *mutex = NULL; static Uint32 mainthread; static SDL_Thread *threads[6]; void printid(void) { printf("Process %u: exiting\n", SDL_ThreadID()); } void terminate(int sig) { printf("Process %u: raising SIGTERM\n", SDL_ThreadID()); raise(SIGTERM); } void closemutex(int sig) { Uint32 id = SDL_ThreadID(); int i; printf("Process %u: Cleaning up...\n", id == mainthread ? 0 : id); for ( i=0; i<6; ++i ) SDL_KillThread(threads[i]); SDL_DestroyMutex(mutex); exit(sig); } int Run(void *data) { if ( SDL_ThreadID() == mainthread ) signal(SIGTERM, closemutex); while ( 1 ) { printf("Process %u ready to work\n", SDL_ThreadID()); if ( SDL_mutexP(mutex) < 0 ) { fprintf(stderr, "Couldn't lock mutex: %s", SDL_GetError()); exit(1); } printf("Process %u, working!\n", SDL_ThreadID()); SDL_Delay(1*1000); printf("Process %u, done!\n", SDL_ThreadID()); if ( SDL_mutexV(mutex) < 0 ) { fprintf(stderr, "Couldn't unlock mutex: %s", SDL_GetError()); exit(1); } /* If this sleep isn't done, then threads may starve */ SDL_Delay(10); } return(0); } int main(int argc, char *argv[]) { int i; int maxproc = 6; /* Load the SDL library */ if ( SDL_Init(0) < 0 ) { fprintf(stderr, "%s\n", SDL_GetError()); exit(1); } atexit(SDL_Quit); if ( (mutex=SDL_CreateMutex()) == NULL ) { fprintf(stderr, "Couldn't create mutex: %s\n", SDL_GetError()); exit(1); } mainthread = SDL_ThreadID(); printf("Main thread: %u\n", mainthread); atexit(printid); for ( i=0; i<maxproc; ++i ) { if ( (threads[i]=SDL_CreateThread(Run, NULL)) == NULL ) fprintf(stderr, "Couldn't create thread!\n"); } signal(SIGINT, terminate); Run(NULL); return(0); /* Never reached */ }