test/testthread.c
author Sam Lantinga <slouken@libsdl.org>
Thu, 07 Dec 2017 16:08:09 -0800
changeset 11730 ac6c607e065c
parent 10737 3406a0f8b041
child 11811 5d94cb6b24d3
permissions -rw-r--r--
Enable building the Metal renderer by default, and weak link the Metal framework so the SDL library is safe to use on older Macs
Also generate iOS versions of the Metal shaders
     1 /*
     2   Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
     3 
     4   This software is provided 'as-is', without any express or implied
     5   warranty.  In no event will the authors be held liable for any damages
     6   arising from the use of this software.
     7 
     8   Permission is granted to anyone to use this software for any purpose,
     9   including commercial applications, and to alter it and redistribute it
    10   freely.
    11 */
    12 
    13 /* Simple test of the SDL threading code */
    14 
    15 #include <stdio.h>
    16 #include <stdlib.h>
    17 #include <signal.h>
    18 
    19 #include "SDL.h"
    20 
    21 static SDL_TLSID tls;
    22 static int alive = 0;
    23 
    24 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
    25 static void
    26 quit(int rc)
    27 {
    28     SDL_Quit();
    29     exit(rc);
    30 }
    31 
    32 int SDLCALL
    33 ThreadFunc(void *data)
    34 {
    35     SDL_TLSSet(tls, "baby thread", NULL);
    36     SDL_Log("Started thread %s: My thread id is %lu, thread data = %s\n",
    37            (char *) data, SDL_ThreadID(), (const char *)SDL_TLSGet(tls));
    38     while (alive) {
    39         SDL_Log("Thread '%s' is alive!\n", (char *) data);
    40         SDL_Delay(1 * 1000);
    41     }
    42     SDL_Log("Thread '%s' exiting!\n", (char *) data);
    43     return (0);
    44 }
    45 
    46 static void
    47 killed(int sig)
    48 {
    49     SDL_Log("Killed with SIGTERM, waiting 5 seconds to exit\n");
    50     SDL_Delay(5 * 1000);
    51     alive = 0;
    52     quit(0);
    53 }
    54 
    55 int
    56 main(int argc, char *argv[])
    57 {
    58     SDL_Thread *thread;
    59 
    60     /* Enable standard application logging */
    61     SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
    62 
    63     /* Load the SDL library */
    64     if (SDL_Init(0) < 0) {
    65         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
    66         return (1);
    67     }
    68 
    69     tls = SDL_TLSCreate();
    70     SDL_assert(tls);
    71     SDL_TLSSet(tls, "main thread", NULL);
    72     SDL_Log("Main thread data initially: %s\n", (const char *)SDL_TLSGet(tls));
    73 
    74     alive = 1;
    75     thread = SDL_CreateThread(ThreadFunc, "One", "#1");
    76     if (thread == NULL) {
    77         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
    78         quit(1);
    79     }
    80     SDL_Delay(5 * 1000);
    81     SDL_Log("Waiting for thread #1\n");
    82     alive = 0;
    83     SDL_WaitThread(thread, NULL);
    84 
    85     SDL_Log("Main thread data finally: %s\n", (const char *)SDL_TLSGet(tls));
    86 
    87     alive = 1;
    88     signal(SIGTERM, killed);
    89     thread = SDL_CreateThread(ThreadFunc, "Two", "#2");
    90     if (thread == NULL) {
    91         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
    92         quit(1);
    93     }
    94     raise(SIGTERM);
    95 
    96     SDL_Quit();                 /* Never reached */
    97     return (0);                 /* Never reached */
    98 }