e14743d1 |
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. */ |
17 | static void quit(int rc) |
18 | { |
19 | SDL_Quit(); |
20 | exit(rc); |
21 | } |
22 | |
23 | int SDLCALL SubThreadFunc(void *data) { |
24 | while(! *(int volatile *)data) { |
25 | ; /*SDL_Delay(10);*/ /* do nothing */ |
26 | } |
27 | return 0; |
28 | } |
29 | |
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 | |
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 | } |