annotate include/SDL_thread.h @ 1299:2bf9dda618e5

Corrects dynamic X11 code on Tru64 systems. Fixes Bugzilla #87.
author Ryan C. Gordon <icculus@icculus.org>
date Mon, 30 Jan 2006 18:21:44 +0000
parents 173c063d4f55
children c9b51268668f
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 #ifndef _SDL_thread_h
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29 #define _SDL_thread_h
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30
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31 /* Header for the SDL thread management routines
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32
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33 These are independent of the other SDL routines.
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34 */
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35
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36 #include "SDL_main.h"
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37 #include "SDL_types.h"
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38
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39 /* Thread synchronization primitives */
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40 #include "SDL_mutex.h"
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41
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42 #include "begin_code.h"
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43 /* Set up for C function definitions, even when using C++ */
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44 #ifdef __cplusplus
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45 extern "C" {
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46 #endif
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47
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48 /* The SDL thread structure, defined in SDL_thread.c */
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49 struct SDL_Thread;
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50 typedef struct SDL_Thread SDL_Thread;
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51
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52 /* Create a thread */
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53 #ifdef __OS2__
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54 /*
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55 We compile SDL into a DLL on OS/2. This means, that it's the DLL which
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56 creates a new thread for the calling process with the SDL_CreateThread()
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57 API. There is a problem with this, that only the RTL of the SDL.DLL will
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58 be initialized for those threads, and not the RTL of the calling application!
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59 To solve this, we make a little hack here.
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60 We'll always use the caller's _beginthread() and _endthread() APIs to
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61 start a new thread. This way, it it's the SDL.DLL which uses this API,
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62 then the RTL of SDL.DLL will be used to create the new thread, and if it's
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63 the application, then the RTL of the application will be used.
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64 So, in short:
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65 Always use the _beginthread() and _endthread() of the calling runtime library!
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66 */
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67
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68 #ifdef __WATCOMC__
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69 #include <process.h> // This has _beginthread() and _endthread() defined!
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70 #endif
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71 #ifdef __EMX__
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72 #include <stdlib.h> // This has _beginthread() and _endthread() defined, if -Zmt flag is used!
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73 #endif
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74
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75 typedef Uint32 SDLCALL (*pfnSDL_CurrentBeginThread)(void (*pfnThreadFn)(void *), Uint32 uiStackSize, void *pParam);
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76 typedef void SDLCALL (*pfnSDL_CurrentEndThread)(void);
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77
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78 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread_Core(int (*fn)(void *), void *data, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread);
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79
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80 // Disable warnings about unreferenced symbol!
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81 #pragma disable_message (202)
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82 static Uint32 SDLCALL SDL_CurrentBeginThread(void (*pfnThreadFn)(void *), Uint32 uiStackSize, void *pParam)
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83 {
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84 return _beginthread(pfnThreadFn, NULL, uiStackSize, pParam);
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85 }
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86
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87 static void SDLCALL SDL_CurrentEndThread(void)
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88 {
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89 _endthread();
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90 }
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91
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92 #define SDL_CreateThread(fn, data) SDL_CreateThread_Core(fn, data, SDL_CurrentBeginThread, SDL_CurrentEndThread)
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93
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94 #else
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95 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data);
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96 #endif
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97
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98 /* Get the 32-bit thread identifier for the current thread */
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99 extern DECLSPEC Uint32 SDLCALL SDL_ThreadID(void);
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100
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101 /* Get the 32-bit thread identifier for the specified thread,
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102 equivalent to SDL_ThreadID() if the specified thread is NULL.
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103 */
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104 extern DECLSPEC Uint32 SDLCALL SDL_GetThreadID(SDL_Thread *thread);
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105
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106 /* Wait for a thread to finish.
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107 The return code for the thread function is placed in the area
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108 pointed to by 'status', if 'status' is not NULL.
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109 */
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110 extern DECLSPEC void SDLCALL SDL_WaitThread(SDL_Thread *thread, int *status);
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111
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112 /* Forcefully kill a thread without worrying about its state */
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113 extern DECLSPEC void SDLCALL SDL_KillThread(SDL_Thread *thread);
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114
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115
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116 /* Ends C function definitions when using C++ */
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117 #ifdef __cplusplus
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118 }
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119 #endif
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120 #include "close_code.h"
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121
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122 #endif /* _SDL_thread_h */