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annotate src/thread/win32/SDL_systhread.c @ 4361:991e4bcfc7a8 SDL-1.2

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Added an error message for when ALSA audio fails
author Sam Lantinga <slouken@libsdl.org>
date Mon, 19 Oct 2009 05:15:21 +0000
parents a1b03ba2fcd0
children eada7e321df6
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* Win32 thread management routines for SDL */
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25
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26 #define WIN32_LEAN_AND_MEAN
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27 #include <windows.h>
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28
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29 #include "SDL_thread.h"
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30 #include "../SDL_thread_c.h"
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31 #include "../SDL_systhread.h"
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32
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33 #ifndef SDL_PASSED_BEGINTHREAD_ENDTHREAD
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34 #ifndef _WIN32_WCE
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35 /* We'll use the C library from this DLL */
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36 #include <process.h>
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37 #endif
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38
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39 #if __GNUC__
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40 typedef unsigned long (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
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41 unsigned (__stdcall *func)(void *), void *arg,
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42 unsigned, unsigned *threadID);
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43 typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
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44 #elif defined(__WATCOMC__)
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45 /* This is for Watcom targets except OS2 */
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46 #if __WATCOMC__ < 1240
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47 #define __watcall
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48 #endif
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49 typedef unsigned long (__watcall *pfnSDL_CurrentBeginThread) (void *, unsigned,
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50 unsigned (__stdcall *func)(void *), void *arg,
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51 unsigned, unsigned *threadID);
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52 typedef void (__watcall *pfnSDL_CurrentEndThread)(unsigned code);
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53 #else
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54 typedef uintptr_t (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
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55 unsigned (__stdcall *func)(void *), void *arg,
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56 unsigned, unsigned *threadID);
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57 typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
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58 #endif
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59 #endif /* !SDL_PASSED_BEGINTHREAD_ENDTHREAD */
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60
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61
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62 typedef struct ThreadStartParms
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63 {
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64 void *args;
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65 pfnSDL_CurrentEndThread pfnCurrentEndThread;
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66 } tThreadStartParms, *pThreadStartParms;
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67
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68 static unsigned __stdcall RunThread(void *data)
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69 {
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70 pThreadStartParms pThreadParms = (pThreadStartParms)data;
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71 pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL;
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72
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73 // Call the thread function!
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74 SDL_RunThread(pThreadParms->args);
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75
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76 // Get the current endthread we have to use!
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77 if (pThreadParms)
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78 {
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79 pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread;
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80 SDL_free(pThreadParms);
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81 }
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82 // Call endthread!
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83 if (pfnCurrentEndThread)
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84 (*pfnCurrentEndThread)(0);
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85 return(0);
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86 }
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87
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88 #ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD
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89 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
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90 {
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91 #else
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92 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
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93 {
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94 #ifdef _WIN32_WCE
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95 pfnSDL_CurrentBeginThread pfnBeginThread = NULL;
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96 pfnSDL_CurrentEndThread pfnEndThread = NULL;
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97 #else
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98 pfnSDL_CurrentBeginThread pfnBeginThread = _beginthreadex;
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99 pfnSDL_CurrentEndThread pfnEndThread = _endthreadex;
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100 #endif
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101 #endif /* SDL_PASSED_BEGINTHREAD_ENDTHREAD */
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102 unsigned threadid;
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103 pThreadStartParms pThreadParms = (pThreadStartParms)SDL_malloc(sizeof(tThreadStartParms));
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104 if (!pThreadParms) {
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105 SDL_OutOfMemory();
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106 return(-1);
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107 }
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108
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109 // Save the function which we will have to call to clear the RTL of calling app!
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110 pThreadParms->pfnCurrentEndThread = pfnEndThread;
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111 // Also save the real parameters we have to pass to thread function
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112 pThreadParms->args = args;
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113
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114 if (pfnBeginThread) {
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115 thread->handle = (SYS_ThreadHandle) pfnBeginThread(NULL, 0, RunThread,
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116 pThreadParms, 0, &threadid);
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117 } else {
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118 thread->handle = CreateThread(NULL, 0, RunThread, pThreadParms, 0, &threadid);
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119 }
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120 if (thread->handle == NULL) {
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121 SDL_SetError("Not enough resources to create thread");
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122 return(-1);
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123 }
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124 return(0);
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125 }
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126
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127 void SDL_SYS_SetupThread(void)
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128 {
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129 return;
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130 }
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131
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132 Uint32 SDL_ThreadID(void)
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133 {
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134 return((Uint32)GetCurrentThreadId());
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135 }
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136
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137 void SDL_SYS_WaitThread(SDL_Thread *thread)
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138 {
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139 WaitForSingleObject(thread->handle, INFINITE);
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140 CloseHandle(thread->handle);
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141 }
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142
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143 /* WARNING: This function is really a last resort.
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144 * Threads should be signaled and then exit by themselves.
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145 * TerminateThread() doesn't perform stack and DLL cleanup.
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146 */
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147 void SDL_SYS_KillThread(SDL_Thread *thread)
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148 {
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149 TerminateThread(thread->handle, FALSE);
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150 }