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annotate test/testlock.c @ 3566:07c8339c95c6

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Fixed bug #905 Give the foreign window message proc more control over Windows events. This may need to be adjusted when we add the capability for the app to specify whether it wants SDL to handle input for the window or not.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 15 Dec 2009 09:20:10 +0000
parents 4436464c4f51
children 0d1b16ee0bca
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 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
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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 %u: 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 Uint32 id = SDL_ThreadID();
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45 int i;
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46 printf("Process %u: 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 %u 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 %u, working!\n", SDL_ThreadID());
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66 SDL_Delay(1 * 1000);
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67 printf("Process %u, 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 %u: 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: %u\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 }