Alc/alcThread.c

   1 /**
   2  * OpenAL cross platform audio library
   3  * Copyright (C) 1999-2007 by authors.
   4  * This library is free software; you can redistribute it and/or
   5  *  modify it under the terms of the GNU Library General Public
   6  *  License as published by the Free Software Foundation; either
   7  *  version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  *  Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  *  License along with this library; if not, write to the
  16  *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  *  Boston, MA  02111-1307, USA.
  18  * Or go to http://www.gnu.org/copyleft/lgpl.html
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24
  25 #include "alMain.h"
  26 #include "alThunk.h"
  27
  28 #define THREAD_STACK_SIZE (1*1024*1024) /* 1MB */
  29
  30 #ifdef _WIN32
  31
  32 typedef struct {
  33     ALuint (*func)(ALvoid*);
  34     ALvoid *ptr;
  35     HANDLE thread;
  36 } ThreadInfo;
  37
  38 static DWORD CALLBACK StarterFunc(void *ptr)
  39 {
  40     ThreadInfo *inf = (ThreadInfo*)ptr;
  41     ALint ret;
  42
  43     ret = inf->func(inf->ptr);
  44     ExitThread((DWORD)ret);
  45
  46     return (DWORD)ret;
  47 }
  48
  49 ALvoid *StartThread(ALuint (*func)(ALvoid*), ALvoid *ptr)
  50 {
  51     DWORD dummy;
  52     ThreadInfo *inf = malloc(sizeof(ThreadInfo));
  53     if(!inf) return 0;
  54
  55     inf->func = func;
  56     inf->ptr = ptr;
  57
  58     inf->thread = CreateThread(NULL, THREAD_STACK_SIZE, StarterFunc, inf, 0, &dummy);
  59     if(!inf->thread)
  60     {
  61         free(inf);
  62         return NULL;
  63     }
  64
  65     return inf;
  66 }
  67
  68 ALuint StopThread(ALvoid *thread)
  69 {
  70     ThreadInfo *inf = thread;
  71     DWORD ret = 0;
  72
  73     WaitForSingleObject(inf->thread, INFINITE);
  74     GetExitCodeThread(inf->thread, &ret);
  75     CloseHandle(inf->thread);
  76
  77     free(inf);
  78
  79     return (ALuint)ret;
  80 }
  81
  82 #else
  83
  84 #include <pthread.h>
  85
  86 typedef struct {
  87     ALuint (*func)(ALvoid*);
  88     ALvoid *ptr;
  89     ALuint ret;
  90     pthread_t thread;
  91 } ThreadInfo;
  92
  93 static void *StarterFunc(void *ptr)
  94 {
  95     ThreadInfo *inf = (ThreadInfo*)ptr;
  96     inf->ret = inf->func(inf->ptr);
  97     return NULL;
  98 }
  99
 100 ALvoid *StartThread(ALuint (*func)(ALvoid*), ALvoid *ptr)
 101 {
 102     pthread_attr_t attr;
 103     ThreadInfo *inf = malloc(sizeof(ThreadInfo));
 104     if(!inf) return NULL;
 105
 106     if(pthread_attr_init(&attr) != 0)
 107     {
 108         free(inf);
 109         return NULL;
 110     }
 111     if(pthread_attr_setstacksize(&attr, THREAD_STACK_SIZE) != 0)
 112     {
 113         pthread_attr_destroy(&attr);
 114         free(inf);
 115         return NULL;
 116     }
 117
 118     inf->func = func;
 119     inf->ptr = ptr;
 120     if(pthread_create(&inf->thread, &attr, StarterFunc, inf) != 0)
 121     {
 122         pthread_attr_destroy(&attr);
 123         free(inf);
 124         return NULL;
 125     }
 126     pthread_attr_destroy(&attr);
 127
 128     return inf;
 129 }
 130
 131 ALuint StopThread(ALvoid *thread)
 132 {
 133     ThreadInfo *inf = thread;
 134     ALuint ret;
 135
 136     pthread_join(inf->thread, NULL);
 137     ret = inf->ret;
 138
 139     free(inf);
 140
 141     return ret;
 142 }
 143
 144 #endif