annotate test/testlock.c @ 4184:ed5913896653 SDL-1.2

Disable Sound Manager support on Mac OS X. It's an OS 9 API that was exposed via Carbon, but is gone in the 10.6 SDK. OS X uses CoreAudio. We only had it in here for debugging purposes anyhow, as SDL would never use it unless forced to with an environment variable. It remains in SDL for OS 9, of course.
author Ryan C. Gordon <icculus@icculus.org>
date Sat, 12 Sep 2009 12:50:25 +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 }