1
2 /* Simple test of the SDL threading code */
3
4 #include <stdio.h>
5 #include <stdlib.h>
6 #include <signal.h>
7 #include <string.h>
8
9 #include "SDL.h"
10 #include "SDL_thread.h"
11
12 #define NUMTHREADS 10
13
14 static char volatile time_for_threads_to_die[NUMTHREADS];
15
16 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
quit(int rc)17 static void quit(int rc)
18 {
19 SDL_Quit();
20 exit(rc);
21 }
22
SubThreadFunc(void * data)23 int SDLCALL SubThreadFunc(void *data) {
24 while(! *(int volatile *)data) {
25 ; /*SDL_Delay(10);*/ /* do nothing */
26 }
27 return 0;
28 }
29
ThreadFunc(void * data)30 int SDLCALL ThreadFunc(void *data) {
31 SDL_Thread *sub_threads[NUMTHREADS];
32 int flags[NUMTHREADS];
33 int i;
34 int tid = (int)(uintptr_t)data;
35
36 fprintf(stderr, "Creating Thread %d\n", tid);
37
38 for(i = 0; i < NUMTHREADS; i++) {
39 flags[i] = 0;
40 sub_threads[i] = SDL_CreateThread(SubThreadFunc, &flags[i]);
41 }
42
43 printf("Thread '%d' waiting for signal\n", tid);
44 while(time_for_threads_to_die[tid] != 1) {
45 ; /* do nothing */
46 }
47
48 printf("Thread '%d' sending signals to subthreads\n", tid);
49 for(i = 0; i < NUMTHREADS; i++) {
50 flags[i] = 1;
51 SDL_WaitThread(sub_threads[i], NULL);
52 }
53
54 printf("Thread '%d' exiting!\n", tid);
55
56 return 0;
57 }
58
main(int argc,char * argv[])59 int main(int argc, char *argv[])
60 {
61 SDL_Thread *threads[NUMTHREADS];
62 int i;
63
64 /* Load the SDL library */
65 if ( SDL_Init(0) < 0 ) {
66 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
67 return(1);
68 }
69
70 signal(SIGSEGV, SIG_DFL);
71 for(i = 0; i < NUMTHREADS; i++) {
72 time_for_threads_to_die[i] = 0;
73 threads[i] = SDL_CreateThread(ThreadFunc, (void *)(uintptr_t)i);
74
75 if ( threads[i] == NULL ) {
76 fprintf(stderr,
77 "Couldn't create thread: %s\n", SDL_GetError());
78 quit(1);
79 }
80 }
81
82 for(i = 0; i < NUMTHREADS; i++) {
83 time_for_threads_to_die[i] = 1;
84 }
85
86 for(i = 0; i < NUMTHREADS; i++) {
87 SDL_WaitThread(threads[i], NULL);
88 }
89 SDL_Quit();
90 return(0);
91 }
92