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annotate test/torturethread.c @ 4495:dbbfdb9ea716

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Simplified clipboard API for sanity's sake. A complete clipboard implementation would support multiple formats that could be queried at runtime, events for when the clipboard contents changed, support for HTML, images, etc. We're not going that crazy, at least for now. :)
author Sam Lantinga <slouken@libsdl.org>
date Wed, 07 Jul 2010 23:54:03 -0700
parents c121d94672cb
children
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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
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18 quit(int rc)
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19 {
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20 SDL_Quit();
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21 exit(rc);
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22 }
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23
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24 int SDLCALL
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25 SubThreadFunc(void *data)
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26 {
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27 while (!*(int volatile *) data) {
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28 ; /*SDL_Delay(10); *//* do nothing */
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29 }
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30 return 0;
0
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31 }
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32
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33 int SDLCALL
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34 ThreadFunc(void *data)
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35 {
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36 SDL_Thread *sub_threads[NUMTHREADS];
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37 int flags[NUMTHREADS];
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38 int i;
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39 int tid = (int) (uintptr_t) data;
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40
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41 fprintf(stderr, "Creating Thread %d\n", tid);
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42
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43 for (i = 0; i < NUMTHREADS; i++) {
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44 flags[i] = 0;
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45 sub_threads[i] = SDL_CreateThread(SubThreadFunc, &flags[i]);
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46 }
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47
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48 printf("Thread '%d' waiting for signal\n", tid);
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49 while (time_for_threads_to_die[tid] != 1) {
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50 ; /* do nothing */
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51 }
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52
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53 printf("Thread '%d' sending signals to subthreads\n", tid);
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54 for (i = 0; i < NUMTHREADS; i++) {
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55 flags[i] = 1;
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56 SDL_WaitThread(sub_threads[i], NULL);
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57 }
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58
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59 printf("Thread '%d' exiting!\n", tid);
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60
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61 return 0;
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62 }
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63
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64 int
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65 main(int argc, char *argv[])
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66 {
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67 SDL_Thread *threads[NUMTHREADS];
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68 int i;
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69
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70 /* Load the SDL library */
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71 if (SDL_Init(0) < 0) {
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72 fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
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73 return (1);
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74 }
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75
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76 signal(SIGSEGV, SIG_DFL);
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77 for (i = 0; i < NUMTHREADS; i++) {
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78 time_for_threads_to_die[i] = 0;
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79 threads[i] = SDL_CreateThread(ThreadFunc, (void *) (uintptr_t) i);
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80
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81 if (threads[i] == NULL) {
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82 fprintf(stderr, "Couldn't create thread: %s\n", SDL_GetError());
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83 quit(1);
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84 }
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85 }
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86
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87 for (i = 0; i < NUMTHREADS; i++) {
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88 time_for_threads_to_die[i] = 1;
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89 }
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90
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91 for (i = 0; i < NUMTHREADS; i++) {
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92 SDL_WaitThread(threads[i], NULL);
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93 }
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94 SDL_Quit();
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95 return (0);
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96 }