annotate test/torturethread.c @ 1574:0fd72308659e

Default to use the visibility attribute, on gcc (is this okay?)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 22 Mar 2006 04:51:44 +0000
parents 1dd8bf30a109
children d5298e8f22b3
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1
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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 /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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17 static void quit(int rc)
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18 {
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19 SDL_Quit();
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20 exit(rc);
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21 }
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22
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23 int SubThreadFunc(void *data) {
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24 while(! *(int volatile *)data) {
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25 ; /*SDL_Delay(10);*/ /* do nothing */
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26 }
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27 return 0;
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28 }
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29
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30 int ThreadFunc(void *data) {
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31 SDL_Thread *sub_threads[NUMTHREADS];
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32 int flags[NUMTHREADS];
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33 int i;
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34 uintptr_t tid = (uintptr_t)data;
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35
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36 fprintf(stderr, "Creating Thread %d\n", tid);
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37
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38 for(i = 0; i < NUMTHREADS; i++) {
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39 flags[i] = 0;
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40 sub_threads[i] = SDL_CreateThread(SubThreadFunc, &flags[i]);
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41 }
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42
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43 printf("Thread '%d' waiting for signal\n", tid);
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44 while(time_for_threads_to_die[tid] != 1) {
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45 ; /* do nothing */
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46 }
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47
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48 printf("Thread '%d' sending signals to subthreads\n", tid);
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49 for(i = 0; i < NUMTHREADS; i++) {
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50 flags[i] = 1;
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51 SDL_WaitThread(sub_threads[i], NULL);
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52 }
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53
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54 printf("Thread '%d' exiting!\n", tid);
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55
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56 return 0;
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57 }
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58
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59 int main(int argc, char *argv[])
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60 {
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61 SDL_Thread *threads[NUMTHREADS];
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62 uintptr_t i;
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63
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64 /* Load the SDL library */
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65 if ( SDL_Init(0) < 0 ) {
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66 fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
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67 return(1);
0
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68 }
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69
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70 signal(SIGSEGV, SIG_DFL);
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71 for(i = 0; i < NUMTHREADS; i++) {
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72 time_for_threads_to_die[i] = 0;
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73 threads[i] = SDL_CreateThread(ThreadFunc, (void *) i);
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74
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75 if ( threads[i] == NULL ) {
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76 fprintf(stderr,
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77 "Couldn't create thread: %s\n", SDL_GetError());
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78 quit(1);
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79 }
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80 }
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81
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82 for(i = 0; i < NUMTHREADS; i++) {
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83 time_for_threads_to_die[i] = 1;
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84 }
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85
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86 for(i = NUMTHREADS-1; i >= 0; --i) {
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87 SDL_WaitThread(threads[i], NULL);
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88 }
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89 SDL_Quit();
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90 return(0);
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91 }