test/testhread.c
author Ryan C. Gordon <icculus@icculus.org>
Wed, 28 Sep 2005 11:36:20 +0000
changeset 1151 be9c9c8f6d53
parent 0 74212992fb08
child 1659 14717b52abc0
permissions -rw-r--r--
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
if SDL is built with a non-cdecl calling convention, and it's just generally
bad practice anyhow.

Now programs explicitly call SDL_Quit() where appropriate, wrap SDL_Quit() in
a cdecl function where it can't be avoided, and rely on the parachute where
a crash might have hit the atexit() before (these ARE test programs, after
all!).
     1 
     2 /* Simple test of the SDL threading code */
     3 
     4 #include <stdio.h>
     5 #include <stdlib.h>
     6 #include <signal.h>
     7 
     8 #include "SDL.h"
     9 #include "SDL_thread.h"
    10 
    11 static int alive = 0;
    12 
    13 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
    14 static void quit(int rc)
    15 {
    16 	SDL_Quit();
    17 	exit(rc);
    18 }
    19 
    20 int ThreadFunc(void *data)
    21 {
    22 	printf("Started thread %s: My thread id is %u\n",
    23 				(char *)data, SDL_ThreadID());
    24 	while ( alive ) {
    25 		printf("Thread '%s' is alive!\n", (char *)data);
    26 		SDL_Delay(1*1000);
    27 	}
    28 	printf("Thread '%s' exiting!\n", (char *)data);
    29 	return(0);
    30 }
    31 
    32 static void killed(int sig)
    33 {
    34 	printf("Killed with SIGTERM, waiting 5 seconds to exit\n");
    35 	SDL_Delay(5*1000);
    36 	alive = 0;
    37 	quit(0);
    38 }
    39 
    40 int main(int argc, char *argv[])
    41 {
    42 	SDL_Thread *thread;
    43 
    44 	/* Load the SDL library */
    45 	if ( SDL_Init(0) < 0 ) {
    46 		fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
    47 		return(1);
    48 	}
    49 
    50 	alive = 1;
    51 	thread = SDL_CreateThread(ThreadFunc, "#1");
    52 	if ( thread == NULL ) {
    53 		fprintf(stderr, "Couldn't create thread: %s\n", SDL_GetError());
    54 		quit(1);
    55 	}
    56 	SDL_Delay(5*1000);
    57 	printf("Waiting for thread #1\n");
    58 	alive = 0;
    59 	SDL_WaitThread(thread, NULL);
    60 
    61 	alive = 1;
    62 	thread = SDL_CreateThread(ThreadFunc, "#2");
    63 	if ( thread == NULL ) {
    64 		fprintf(stderr, "Couldn't create thread: %s\n", SDL_GetError());
    65 		quit(1);
    66 	}
    67 	SDL_Delay(5*1000);
    68 	printf("Killing thread #2\n");
    69 	SDL_KillThread(thread);
    70 
    71 	alive = 1;
    72 	signal(SIGTERM, killed);
    73 	thread = SDL_CreateThread(ThreadFunc, "#3");
    74 	if ( thread == NULL ) {
    75 		fprintf(stderr, "Couldn't create thread: %s\n", SDL_GetError());
    76 		quit(1);
    77 	}
    78 	raise(SIGTERM);
    79 
    80 	SDL_Quit();	/* Never reached */
    81 	return(0);	/* Never reached */
    82 }