test/torturethread.c
author Philipp Wiesemann <philipp.wiesemann@arcor.de>
Wed, 18 Feb 2015 21:31:21 +0100
changeset 9356 e87d6e1e812a
parent 8149 681eb46b8ac4
child 9619 b94b6d0bff0f
permissions -rw-r--r--
Removed redundant include statements from test programs.

The needed header files are already included with SDL.h. Still including them in
the test programs is confusing because it somehow suggests they would be needed.
     1 /*
     2   Copyright (C) 1997-2014 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 #include <string.h>
    19 
    20 #include "SDL.h"
    21 
    22 #define NUMTHREADS 10
    23 
    24 static char volatile time_for_threads_to_die[NUMTHREADS];
    25 
    26 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
    27 static void
    28 quit(int rc)
    29 {
    30     SDL_Quit();
    31     exit(rc);
    32 }
    33 
    34 int SDLCALL
    35 SubThreadFunc(void *data)
    36 {
    37     while (!*(int volatile *) data) {
    38         ;                       /* SDL_Delay(10); *//* do nothing */
    39     }
    40     return 0;
    41 }
    42 
    43 int SDLCALL
    44 ThreadFunc(void *data)
    45 {
    46     SDL_Thread *sub_threads[NUMTHREADS];
    47     int flags[NUMTHREADS];
    48     int i;
    49     int tid = (int) (uintptr_t) data;
    50 
    51     SDL_Log("Creating Thread %d\n", tid);
    52 
    53     for (i = 0; i < NUMTHREADS; i++) {
    54         char name[64];
    55         SDL_snprintf(name, sizeof (name), "Child%d_%d", tid, i);
    56         flags[i] = 0;
    57         sub_threads[i] = SDL_CreateThread(SubThreadFunc, name, &flags[i]);
    58     }
    59 
    60     SDL_Log("Thread '%d' waiting for signal\n", tid);
    61     while (time_for_threads_to_die[tid] != 1) {
    62         ;                       /* do nothing */
    63     }
    64 
    65     SDL_Log("Thread '%d' sending signals to subthreads\n", tid);
    66     for (i = 0; i < NUMTHREADS; i++) {
    67         flags[i] = 1;
    68         SDL_WaitThread(sub_threads[i], NULL);
    69     }
    70 
    71     SDL_Log("Thread '%d' exiting!\n", tid);
    72 
    73     return 0;
    74 }
    75 
    76 int
    77 main(int argc, char *argv[])
    78 {
    79     SDL_Thread *threads[NUMTHREADS];
    80     int i;
    81 
    82 	/* Enable standard application logging */
    83     SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
    84 
    85     /* Load the SDL library */
    86     if (SDL_Init(0) < 0) {
    87         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
    88         return (1);
    89     }
    90 
    91     signal(SIGSEGV, SIG_DFL);
    92     for (i = 0; i < NUMTHREADS; i++) {
    93         char name[64];
    94         SDL_snprintf(name, sizeof (name), "Parent%d", i);
    95         time_for_threads_to_die[i] = 0;
    96         threads[i] = SDL_CreateThread(ThreadFunc, name, (void*) (uintptr_t) i);
    97 
    98         if (threads[i] == NULL) {
    99             SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
   100             quit(1);
   101         }
   102     }
   103 
   104     for (i = 0; i < NUMTHREADS; i++) {
   105         time_for_threads_to_die[i] = 1;
   106     }
   107 
   108     for (i = 0; i < NUMTHREADS; i++) {
   109         SDL_WaitThread(threads[i], NULL);
   110     }
   111     SDL_Quit();
   112     return (0);
   113 }