annotate src/thread/win32/SDL_systhread.c @ 1551:02e19471a694

Fixed bug #4 [Note: I'm applying this patch since it's a cleaner version of what's already implemented, and supports this controller on older kernels. I'll ask to make sure this doesn't break on the new kernels where it's no longer necessary] Date: Mon, 21 Mar 2005 09:41:11 -0500 From: Chris Nelson Subject: SDL Patch Hey, Ryan. I submitted the following patch about a year ago. It's just a simple patch for the linux port, to make multiple joysticks each appear to SDL as their own device, if they are on the same USB port (specifically, these guys <http://www.consoleplus.co.uk/product_info.php?pName=super-joybox-5-quad-joypad-converter>, which allow 4 Playstation2 controllers to be accessed via a single USB port). Without this patch, SDL pretty much drops the ball, and reports that there are 4 joysticks available when less than that number are plugged in. My work built upon the work of another person with the same device. When I submitted the patch to the list, he tested it, but it didn't work for him, so the patch was never accepted. Maybe about 3 times in the past year, I've tried to email the guy, to see if he couldn't run my new version, complete with debug code to diagnose the problem he was having. He never got back to me. So, I'm attaching the patch. I wish I knew why it didn't work for him, but I've been using it for the last year with no problems. Let me know if you need any more information, or have any ideas as to how I could test it. I'd like to see it in the tree, but I want to make sure it works. -Chris
author Sam Lantinga <slouken@libsdl.org>
date Sun, 19 Mar 2006 06:31:34 +0000
parents 9fb0eee04dd9
children 14717b52abc0
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 #else
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45 typedef uintptr_t (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
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46 unsigned (__stdcall *func)(void *), void *arg,
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47 unsigned, unsigned *threadID);
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48 typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
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49 #endif
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50 #endif /* !SDL_PASSED_BEGINTHREAD_ENDTHREAD */
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51
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52
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53 typedef struct ThreadStartParms
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54 {
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55 void *args;
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56 pfnSDL_CurrentEndThread pfnCurrentEndThread;
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57 } tThreadStartParms, *pThreadStartParms;
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58
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59 static unsigned __stdcall RunThread(void *data)
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60 {
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61 pThreadStartParms pThreadParms = (pThreadStartParms)data;
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62 pfnSDL_CurrentEndThread pfnCurrentEndThread = NULL;
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63
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64 // Call the thread function!
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65 SDL_RunThread(pThreadParms->args);
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66
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67 // Get the current endthread we have to use!
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68 if (pThreadParms)
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69 {
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70 pfnCurrentEndThread = pThreadParms->pfnCurrentEndThread;
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71 SDL_free(pThreadParms);
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72 }
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73 // Call endthread!
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74 if (pfnCurrentEndThread)
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75 (*pfnCurrentEndThread)(0);
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76 return(0);
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77 }
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78
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79 #ifdef SDL_PASSED_BEGINTHREAD_ENDTHREAD
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80 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread)
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81 {
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82 #else
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83 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
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84 {
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85 #ifdef _WIN32_WCE
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86 pfnSDL_CurrentBeginThread pfnBeginThread = NULL;
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87 pfnSDL_CurrentEndThread pfnEndThread = NULL;
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88 #else
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89 pfnSDL_CurrentBeginThread pfnBeginThread = _beginthreadex;
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90 pfnSDL_CurrentEndThread pfnEndThread = _endthreadex;
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91 #endif
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92 #endif /* SDL_PASSED_BEGINTHREAD_ENDTHREAD */
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93 unsigned threadid;
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94 pThreadStartParms pThreadParms = (pThreadStartParms)SDL_malloc(sizeof(tThreadStartParms));
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95 if (!pThreadParms) {
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96 SDL_OutOfMemory();
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97 return(-1);
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98 }
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99
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100 // Save the function which we will have to call to clear the RTL of calling app!
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101 pThreadParms->pfnCurrentEndThread = pfnEndThread;
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102 // Also save the real parameters we have to pass to thread function
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103 pThreadParms->args = args;
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104
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105 if (pfnBeginThread) {
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106 thread->handle = (SYS_ThreadHandle) pfnBeginThread(NULL, 0, RunThread,
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107 pThreadParms, 0, &threadid);
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108 } else {
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109 thread->handle = CreateThread(NULL, 0, RunThread, pThreadParms, 0, &threadid);
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110 }
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111 if (thread->handle == NULL) {
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112 SDL_SetError("Not enough resources to create thread");
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113 return(-1);
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114 }
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115 return(0);
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116 }
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117
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118 void SDL_SYS_SetupThread(void)
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119 {
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120 return;
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121 }
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122
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123 Uint32 SDL_ThreadID(void)
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124 {
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125 return((Uint32)GetCurrentThreadId());
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126 }
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127
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128 void SDL_SYS_WaitThread(SDL_Thread *thread)
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129 {
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130 WaitForSingleObject(thread->handle, INFINITE);
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131 CloseHandle(thread->handle);
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132 }
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133
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134 /* WARNING: This function is really a last resort.
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135 * Threads should be signaled and then exit by themselves.
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136 * TerminateThread() doesn't perform stack and DLL cleanup.
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137 */
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138 void SDL_SYS_KillThread(SDL_Thread *thread)
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139 {
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140 TerminateThread(thread->handle, FALSE);
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141 }