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2 /* Simple test of the SDL threading code */
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3
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4 #include <stdio.h>
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5 #include <stdlib.h>
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6 #include <signal.h>
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7 #include <string.h>
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8
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9 #include "SDL.h"
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10 #include "SDL_thread.h"
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11
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12 #define NUMTHREADS 10
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13
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14 static char volatile time_for_threads_to_die[NUMTHREADS];
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15
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16 int SubThreadFunc(void *data) {
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17 while(! *(int volatile *)data) {
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18 ; /*SDL_Delay(10); /* do nothing */
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19 }
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20 return 0;
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21 }
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22
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23 int ThreadFunc(void *data) {
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24 SDL_Thread *sub_threads[NUMTHREADS];
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25 int flags[NUMTHREADS];
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26 int i;
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27 int tid = (int ) data;
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28
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29 fprintf(stderr, "Creating Thread %d\n", tid);
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30
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31 for(i = 0; i < NUMTHREADS; i++) {
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32 flags[i] = 0;
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33 sub_threads[i] = SDL_CreateThread(SubThreadFunc, &flags[i]);
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34 }
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35
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36 printf("Thread '%d' waiting for signal\n", tid);
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37 while(time_for_threads_to_die[tid] != 1) {
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38 ; /* do nothing */
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39 }
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40
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41 printf("Thread '%d' sending signals to subthreads\n", tid);
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42 for(i = 0; i < NUMTHREADS; i++) {
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43 flags[i] = 1;
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44 SDL_WaitThread(sub_threads[i], NULL);
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45 }
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46
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47 printf("Thread '%d' exiting!\n", tid);
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48
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49 return 0;
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50 }
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51
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52 int main(int argc, char *argv[])
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53 {
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54 SDL_Thread *threads[NUMTHREADS];
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55 int i;
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56
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57 /* Load the SDL library */
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58 if ( SDL_Init(0) < 0 ) {
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59 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
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60 exit(1);
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61 }
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62 atexit(SDL_Quit);
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63
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64
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65 signal(SIGSEGV, SIG_DFL);
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66 for(i = 0; i < NUMTHREADS; i++) {
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67 time_for_threads_to_die[i] = 0;
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68 threads[i] = SDL_CreateThread(ThreadFunc, (void *) i);
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69
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70 if ( threads[i] == NULL ) {
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71 fprintf(stderr,
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72 "Couldn't create thread: %s\n", SDL_GetError());
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73 exit(1);
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74 }
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75 }
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76
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77 for(i = 0; i < NUMTHREADS; i++) {
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78 time_for_threads_to_die[i] = 1;
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79 }
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80
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81 for(i = NUMTHREADS-1; i >= 0; --i) {
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82 SDL_WaitThread(threads[i], NULL);
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83 }
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84 return(0); /* Never reached */
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85 }
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