test/testlock.c
author Ryan C. Gordon <icculus@icculus.org>
Fri, 12 Aug 2016 19:59:00 -0400
changeset 10266 c09f06c4e8c8
parent 10003 d91a2c45825e
permissions -rw-r--r--
emscripten: send fake mouse events for touches, like other targets do. (This really should be handled at the higher level and not in the individual targets, but this fixes the immediate bug.)
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/*
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  Copyright (C) 1997-2016 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 SDL_atomic_t doterminate;
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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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    SDL_AtomicSet(&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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    SDL_AtomicSet(&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 (!SDL_AtomicGet(&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 && SDL_AtomicGet(&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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    SDL_AtomicSet(&doterminate, 0);
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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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}