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annotate test/testlock.c @ 3164:c5b2884c26b4

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Added an ifdef so that if you #define SDL_NO_COMPAT before you include SDL.h then SDL_compat.h will never be included in your code. This is useful for making sure that your code uses only SDL 1.3 features. It is also handy for finding things that are in SDL_compat.h that belong elsewhere.
author Bob Pendleton <bob@pendleton.com>
date Thu, 04 Jun 2009 21:00:45 +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 }