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annotate test/testlock.c @ 4849:0b918c186938

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Finally got the Win32 API code for shaping to work! Just need to fix SDL_CalculateShapeTree() now!
author egottlieb
date Sat, 14 Aug 2010 16:14:36 -0400
parents 0d1b16ee0bca
children
rev   line source
0
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1
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2 /* Test the thread and mutex locking functions
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3 Also exercises the system's signal/thread interaction
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4 */
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5
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6 #include <signal.h>
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7 #include <stdio.h>
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8
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9 #include "SDL.h"
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10 #include "SDL_mutex.h"
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11 #include "SDL_thread.h"
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12
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13 static SDL_mutex *mutex = NULL;
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14 static SDL_threadID mainthread;
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15 static SDL_Thread *threads[6];
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16 static volatile int doterminate = 0;
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17
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18 /*
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19 * SDL_Quit() shouldn't be used with atexit() directly because
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20 * calling conventions may differ...
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21 */
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22 static void
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23 SDL_Quit_Wrapper(void)
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24 {
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25 SDL_Quit();
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26 }
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27
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28 void
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29 printid(void)
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30 {
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31 printf("Process %lu: exiting\n", SDL_ThreadID());
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32 }
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33
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34 void
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35 terminate(int sig)
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36 {
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37 signal(SIGINT, terminate);
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38 doterminate = 1;
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39 }
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40
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41 void
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42 closemutex(int sig)
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43 {
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44 SDL_threadID id = SDL_ThreadID();
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45 int i;
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46 printf("Process %lu: Cleaning up...\n", id == mainthread ? 0 : id);
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47 doterminate = 1;
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48 for (i = 0; i < 6; ++i)
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49 SDL_WaitThread(threads[i], NULL);
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50 SDL_DestroyMutex(mutex);
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51 exit(sig);
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52 }
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53
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54 int SDLCALL
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55 Run(void *data)
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56 {
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57 if (SDL_ThreadID() == mainthread)
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58 signal(SIGTERM, closemutex);
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59 while (!doterminate) {
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60 printf("Process %lu ready to work\n", SDL_ThreadID());
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61 if (SDL_mutexP(mutex) < 0) {
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62 fprintf(stderr, "Couldn't lock mutex: %s", SDL_GetError());
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63 exit(1);
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64 }
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65 printf("Process %lu, working!\n", SDL_ThreadID());
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66 SDL_Delay(1 * 1000);
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67 printf("Process %lu, done!\n", SDL_ThreadID());
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68 if (SDL_mutexV(mutex) < 0) {
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69 fprintf(stderr, "Couldn't unlock mutex: %s", SDL_GetError());
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70 exit(1);
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71 }
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72 /* If this sleep isn't done, then threads may starve */
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73 SDL_Delay(10);
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74 }
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75 if (SDL_ThreadID() == mainthread && doterminate) {
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76 printf("Process %lu: raising SIGTERM\n", SDL_ThreadID());
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77 raise(SIGTERM);
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78 }
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79 return (0);
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80 }
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81
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82 int
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83 main(int argc, char *argv[])
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84 {
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85 int i;
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86 int maxproc = 6;
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87
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88 /* Load the SDL library */
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89 if (SDL_Init(0) < 0) {
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90 fprintf(stderr, "%s\n", SDL_GetError());
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91 exit(1);
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92 }
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93 atexit(SDL_Quit_Wrapper);
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94
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95 if ((mutex = SDL_CreateMutex()) == NULL) {
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96 fprintf(stderr, "Couldn't create mutex: %s\n", SDL_GetError());
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97 exit(1);
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98 }
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99
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100 mainthread = SDL_ThreadID();
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101 printf("Main thread: %lu\n", mainthread);
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102 atexit(printid);
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103 for (i = 0; i < maxproc; ++i) {
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104 if ((threads[i] = SDL_CreateThread(Run, NULL)) == NULL)
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105 fprintf(stderr, "Couldn't create thread!\n");
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106 }
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107 signal(SIGINT, terminate);
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108 Run(NULL);
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109
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110 return (0); /* Never reached */
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111 }