Mercurial > sdl-ios-xcode
annotate test/testsem.c @ 1199:2d6dc7de1145
From: Mike Frysinger <vapier@gentoo.org>
To: sdl@libsdl.org
Date: Sun, 11 Dec 2005 22:57:37 -0500
Subject: [SDL] exec stack in libsdl update
i posted back in September a patch to remove executable stacks:
http://www.devolution.com/pipermail/sdl/2005-September/070626.html
later in November, a similar patch was merged it seems:
http://www.libsdl.org/cgi/cvsweb.cgi/SDL12/src/hermes/mmx_main.asm
however, this lacks the additional output format checks that i posted in my
patch ... this isnt a problem if the hermes asm code is only ever used to
produce ELF objects, but if this is not true, then the additional checks in
my original patch will need to be merged
-mike
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 12 Dec 2005 09:13:12 +0000 |
| parents | be9c9c8f6d53 |
| children | 4d3bb026cd16 |
| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* Simple test of the SDL semaphore 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 #define NUM_THREADS 10 | |
| 12 | |
| 13 static SDL_sem *sem; | |
| 14 int alive = 1; | |
| 15 | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
16 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
17 static void quit(int rc) |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
18 { |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
19 SDL_Quit(); |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
20 exit(rc); |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
21 } |
|
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
22 |
| 0 | 23 int ThreadFunc(void *data) |
| 24 { | |
| 25 while ( alive ) { | |
| 26 SDL_SemWait(sem); | |
| 27 fprintf(stderr, "Thread number %d has got the semaphore (value = %d)!\n", (int)data, SDL_SemValue(sem)); | |
| 28 SDL_Delay(200); | |
| 29 SDL_SemPost(sem); | |
| 30 fprintf(stderr, "Thread number %d has released the semaphore (value = %d)!\n", (int)data, SDL_SemValue(sem)); | |
| 31 SDL_Delay(1); /* For the scheduler */ | |
| 32 } | |
| 33 printf("Thread number %d exiting.\n", (int)data); | |
| 34 return 0; | |
| 35 } | |
| 36 | |
| 37 static void killed(int sig) | |
| 38 { | |
| 39 alive = 0; | |
| 40 } | |
| 41 | |
| 42 int main(int argc, char **argv) | |
| 43 { | |
| 44 SDL_Thread *threads[NUM_THREADS]; | |
| 45 int i, init_sem; | |
| 46 | |
| 47 if(argc < 2) { | |
| 48 fprintf(stderr,"Usage: %s init_value\n", argv[0]); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
49 return(1); |
| 0 | 50 } |
| 51 | |
| 52 /* Load the SDL library */ | |
| 53 if ( SDL_Init(0) < 0 ) { | |
| 54 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
55 return(1); |
| 0 | 56 } |
| 57 signal(SIGTERM, killed); | |
| 58 signal(SIGINT, killed); | |
| 59 | |
| 60 init_sem = atoi(argv[1]); | |
| 61 sem = SDL_CreateSemaphore(init_sem); | |
| 62 | |
| 63 printf("Running %d threads, semaphore value = %d\n", NUM_THREADS, init_sem); | |
| 64 /* Create all the threads */ | |
| 65 for( i = 0; i < NUM_THREADS; ++i ) { | |
| 66 threads[i] = SDL_CreateThread(ThreadFunc, (void*)i); | |
| 67 } | |
| 68 | |
| 69 /* Wait 10 seconds */ | |
| 70 SDL_Delay(10 * 1000); | |
| 71 | |
| 72 /* Wait for all threads to finish */ | |
| 73 printf("Waiting for threads to finish\n"); | |
| 74 alive = 0; | |
| 75 for( i = 0; i < NUM_THREADS; ++i ) { | |
| 76 SDL_WaitThread(threads[i], NULL); | |
| 77 } | |
| 78 printf("Finished waiting for threads\n"); | |
| 79 | |
| 80 SDL_DestroySemaphore(sem); | |
|
1151
be9c9c8f6d53
Removed atexit() from most of the test programs; atexit(SDL_Quit) isn't safe
Ryan C. Gordon <icculus@icculus.org>
parents:
0
diff
changeset
|
81 SDL_Quit(); |
| 0 | 82 return(0); |
| 83 } |