annotate test/testlock.c @ 3983:540466e900db SDL-1.2

Removed textrels from hermes code. Partially fixes Bugzilla #418.
author Ryan C. Gordon <icculus@icculus.org>
date Wed, 27 Jun 2007 10:12:49 +0000
parents 290b5baf2fca
children 782fd950bd46 c121d94672cb
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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 Uint32 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 SDL_Quit_Wrapper(void)
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23 {
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24 SDL_Quit();
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25 }
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26
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27 void printid(void)
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28 {
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29 printf("Process %u: exiting\n", SDL_ThreadID());
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30 }
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31
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32 void terminate(int sig)
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33 {
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34 signal(SIGINT, terminate);
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35 doterminate = 1;
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36 }
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37 void closemutex(int sig)
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38 {
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39 Uint32 id = SDL_ThreadID();
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40 int i;
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41 printf("Process %u: Cleaning up...\n", id == mainthread ? 0 : id);
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42 for ( i=0; i<6; ++i )
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43 SDL_KillThread(threads[i]);
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44 SDL_DestroyMutex(mutex);
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45 exit(sig);
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46 }
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47 int SDLCALL Run(void *data)
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48 {
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49 if ( SDL_ThreadID() == mainthread )
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50 signal(SIGTERM, closemutex);
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51 while ( 1 ) {
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52 printf("Process %u ready to work\n", SDL_ThreadID());
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53 if ( SDL_mutexP(mutex) < 0 ) {
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54 fprintf(stderr, "Couldn't lock mutex: %s", SDL_GetError());
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55 exit(1);
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56 }
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57 printf("Process %u, working!\n", SDL_ThreadID());
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58 SDL_Delay(1*1000);
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59 printf("Process %u, done!\n", SDL_ThreadID());
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60 if ( SDL_mutexV(mutex) < 0 ) {
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61 fprintf(stderr, "Couldn't unlock mutex: %s", SDL_GetError());
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62 exit(1);
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63 }
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64 /* If this sleep isn't done, then threads may starve */
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65 SDL_Delay(10);
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66 if (SDL_ThreadID() == mainthread && doterminate) {
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67 printf("Process %u: raising SIGTERM\n", SDL_ThreadID());
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68 raise(SIGTERM);
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69 }
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70 }
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71 return(0);
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72 }
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73
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74 int main(int argc, char *argv[])
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75 {
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76 int i;
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77 int maxproc = 6;
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78
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79 /* Load the SDL library */
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80 if ( SDL_Init(0) < 0 ) {
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81 fprintf(stderr, "%s\n", SDL_GetError());
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82 exit(1);
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83 }
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84 atexit(SDL_Quit_Wrapper);
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85
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86 if ( (mutex=SDL_CreateMutex()) == NULL ) {
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87 fprintf(stderr, "Couldn't create mutex: %s\n", SDL_GetError());
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88 exit(1);
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89 }
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90
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91 mainthread = SDL_ThreadID();
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92 printf("Main thread: %u\n", mainthread);
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93 atexit(printid);
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94 for ( i=0; i<maxproc; ++i ) {
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95 if ( (threads[i]=SDL_CreateThread(Run, NULL)) == NULL )
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96 fprintf(stderr, "Couldn't create thread!\n");
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97 }
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98 signal(SIGINT, terminate);
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99 Run(NULL);
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100
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101 return(0); /* Never reached */
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102 }