mirror of
https://github.com/Relintai/sdl2_frt.git
synced 2024-12-16 11:06:49 +01:00
0e45984fa0
The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/*
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Copyright (C) 1997-2015 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 the thread and mutex locking functions
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Also exercises the system's signal/thread interaction
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*/
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h> /* for atexit() */
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#include "SDL.h"
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static SDL_mutex *mutex = NULL;
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static SDL_threadID mainthread;
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static SDL_Thread *threads[6];
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static volatile int doterminate = 0;
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/*
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* SDL_Quit() shouldn't be used with atexit() directly because
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* calling conventions may differ...
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*/
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static void
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SDL_Quit_Wrapper(void)
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{
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SDL_Quit();
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}
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void
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printid(void)
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{
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SDL_Log("Process %lu: exiting\n", SDL_ThreadID());
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}
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void
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terminate(int sig)
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{
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signal(SIGINT, terminate);
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doterminate = 1;
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}
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void
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closemutex(int sig)
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{
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SDL_threadID id = SDL_ThreadID();
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int i;
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SDL_Log("Process %lu: Cleaning up...\n", id == mainthread ? 0 : id);
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doterminate = 1;
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for (i = 0; i < 6; ++i)
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SDL_WaitThread(threads[i], NULL);
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SDL_DestroyMutex(mutex);
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exit(sig);
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}
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int SDLCALL
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Run(void *data)
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{
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if (SDL_ThreadID() == mainthread)
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signal(SIGTERM, closemutex);
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while (!doterminate) {
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SDL_Log("Process %lu ready to work\n", SDL_ThreadID());
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if (SDL_LockMutex(mutex) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't lock mutex: %s", SDL_GetError());
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exit(1);
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}
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SDL_Log("Process %lu, working!\n", SDL_ThreadID());
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SDL_Delay(1 * 1000);
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SDL_Log("Process %lu, done!\n", SDL_ThreadID());
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if (SDL_UnlockMutex(mutex) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't unlock mutex: %s", SDL_GetError());
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exit(1);
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}
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/* If this sleep isn't done, then threads may starve */
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SDL_Delay(10);
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}
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if (SDL_ThreadID() == mainthread && doterminate) {
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SDL_Log("Process %lu: raising SIGTERM\n", SDL_ThreadID());
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raise(SIGTERM);
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}
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return (0);
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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;
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int maxproc = 6;
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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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/* Load the SDL library */
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if (SDL_Init(0) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "%s\n", SDL_GetError());
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exit(1);
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}
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atexit(SDL_Quit_Wrapper);
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if ((mutex = SDL_CreateMutex()) == NULL) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create mutex: %s\n", SDL_GetError());
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exit(1);
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}
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mainthread = SDL_ThreadID();
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SDL_Log("Main thread: %lu\n", mainthread);
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atexit(printid);
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for (i = 0; i < maxproc; ++i) {
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char name[64];
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SDL_snprintf(name, sizeof (name), "Worker%d", i);
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if ((threads[i] = SDL_CreateThread(Run, name, NULL)) == NULL)
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread!\n");
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}
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signal(SIGINT, terminate);
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Run(NULL);
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return (0); /* Never reached */
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}
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