Mercurial > sdl-ios-xcode

annotate test/testlock.c @ 2661:d38309be5178 gsoc2008_audio_resampling

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The windowed sinc filter generation code seems to be working fine. The FIR filtering code is also now working reasonably well. Occasionally the FIR filter will pop, but setting the normalization factor lower seems to help this. I suspect the problem is in the fixed point multiply/add. I also have a hunch the zero stuffing/sample discarding code is not correct, and I'll look at that soon to get it sorted out.
author Aaron Wishnick <schnarf@gmail.com>
date Wed, 02 Jul 2008 08:04:50 +0000
parents c121d94672cb
children 4436464c4f51
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 for (i = 0; i < 6; ++i)
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48 SDL_KillThread(threads[i]);
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49 SDL_DestroyMutex(mutex);
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50 exit(sig);
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51 }
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52
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53 int SDLCALL
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54 Run(void *data)
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55 {
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56 if (SDL_ThreadID() == mainthread)
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57 signal(SIGTERM, closemutex);
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58 while (1) {
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59 printf("Process %u ready to work\n", SDL_ThreadID());
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60 if (SDL_mutexP(mutex) < 0) {
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61 fprintf(stderr, "Couldn't lock mutex: %s", SDL_GetError());
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62 exit(1);
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63 }
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64 printf("Process %u, working!\n", SDL_ThreadID());
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65 SDL_Delay(1 * 1000);
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66 printf("Process %u, done!\n", SDL_ThreadID());
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67 if (SDL_mutexV(mutex) < 0) {
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68 fprintf(stderr, "Couldn't unlock mutex: %s", SDL_GetError());
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69 exit(1);
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70 }
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71 /* If this sleep isn't done, then threads may starve */
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72 SDL_Delay(10);
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73 if (SDL_ThreadID() == mainthread && doterminate) {
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74 printf("Process %u: raising SIGTERM\n", SDL_ThreadID());
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75 raise(SIGTERM);
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76 }
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77 }
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78 return (0);
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79 }
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80
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81 int
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82 main(int argc, char *argv[])
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83 {
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84 int i;
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85 int maxproc = 6;
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86
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87 /* Load the SDL library */
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88 if (SDL_Init(0) < 0) {
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89 fprintf(stderr, "%s\n", SDL_GetError());
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90 exit(1);
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91 }
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92 atexit(SDL_Quit_Wrapper);
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93
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94 if ((mutex = SDL_CreateMutex()) == NULL) {
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95 fprintf(stderr, "Couldn't create mutex: %s\n", SDL_GetError());
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96 exit(1);
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97 }
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98
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99 mainthread = SDL_ThreadID();
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100 printf("Main thread: %u\n", mainthread);
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101 atexit(printid);
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102 for (i = 0; i < maxproc; ++i) {
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103 if ((threads[i] = SDL_CreateThread(Run, NULL)) == NULL)
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104 fprintf(stderr, "Couldn't create thread!\n");
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105 }
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106 signal(SIGINT, terminate);
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107 Run(NULL);
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108
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109 return (0); /* Never reached */
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110 }