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annotate include/SDL_thread.h @ 1794:5605a9820134

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Fixed bug #137 If SDL_OpenAudio() is passed zero for the desired format fields, the following environment variables will be used to fill them in: SDL_AUDIO_FREQUENCY SDL_AUDIO_FORMAT SDL_AUDIO_CHANNELS SDL_AUDIO_SAMPLES If an environment variable is not specified, it will be set to a reasonable default value.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 09 May 2006 08:52:54 +0000
parents 9fb0eee04dd9
children 782fd950bd46 d5d3a6fe05a1
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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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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 #ifndef _SDL_thread_h
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24 #define _SDL_thread_h
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25
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26 /* Header for the SDL thread management routines
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27
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28 These are independent of the other SDL routines.
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29 */
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30
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31 #include "SDL_stdinc.h"
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32 #include "SDL_error.h"
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33
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34 /* Thread synchronization primitives */
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35 #include "SDL_mutex.h"
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36
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37 #include "begin_code.h"
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38 /* Set up for C function definitions, even when using C++ */
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39 #ifdef __cplusplus
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40 extern "C" {
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41 #endif
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42
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43 /* The SDL thread structure, defined in SDL_thread.c */
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44 struct SDL_Thread;
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45 typedef struct SDL_Thread SDL_Thread;
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46
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47 /* Create a thread */
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48 #if (defined(__WIN32__) && !defined(HAVE_LIBC)) || defined(__OS2__)
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49 /*
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50 We compile SDL into a DLL on OS/2. This means, that it's the DLL which
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51 creates a new thread for the calling process with the SDL_CreateThread()
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52 API. There is a problem with this, that only the RTL of the SDL.DLL will
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53 be initialized for those threads, and not the RTL of the calling application!
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54 To solve this, we make a little hack here.
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55 We'll always use the caller's _beginthread() and _endthread() APIs to
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56 start a new thread. This way, if it's the SDL.DLL which uses this API,
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57 then the RTL of SDL.DLL will be used to create the new thread, and if it's
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58 the application, then the RTL of the application will be used.
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59 So, in short:
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60 Always use the _beginthread() and _endthread() of the calling runtime library!
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61 */
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62 #define SDL_PASSED_BEGINTHREAD_ENDTHREAD
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63 #ifndef _WIN32_WCE
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64 #include <process.h> /* This has _beginthread() and _endthread() defined! */
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65 #endif
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66
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67 #ifdef __OS2__
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68 typedef int (*pfnSDL_CurrentBeginThread)(void (*func)(void *), void *, unsigned, void *arg);
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69 typedef void (*pfnSDL_CurrentEndThread)(void);
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70 #elif __GNUC__
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71 typedef unsigned long (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
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72 unsigned (__stdcall *func)(void *), void *arg,
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73 unsigned, unsigned *threadID);
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74 typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
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75 #else
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76 typedef uintptr_t (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
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77 unsigned (__stdcall *func)(void *), void *arg,
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78 unsigned, unsigned *threadID);
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79 typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
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80 #endif
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81
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82 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (*fn)(void *), void *data, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread);
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83
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84 #ifdef __OS2__
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85 #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, _beginthread, _endthread)
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86 #elif defined(_WIN32_WCE)
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87 #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, NULL, NULL)
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88 #else
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89 #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, _beginthreadex, _endthreadex)
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90 #endif
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91 #else
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92 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data);
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93 #endif
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94
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95 /* Get the 32-bit thread identifier for the current thread */
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96 extern DECLSPEC Uint32 SDLCALL SDL_ThreadID(void);
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97
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98 /* Get the 32-bit thread identifier for the specified thread,
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99 equivalent to SDL_ThreadID() if the specified thread is NULL.
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100 */
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101 extern DECLSPEC Uint32 SDLCALL SDL_GetThreadID(SDL_Thread *thread);
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102
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103 /* Wait for a thread to finish.
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104 The return code for the thread function is placed in the area
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105 pointed to by 'status', if 'status' is not NULL.
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106 */
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107 extern DECLSPEC void SDLCALL SDL_WaitThread(SDL_Thread *thread, int *status);
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108
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109 /* Forcefully kill a thread without worrying about its state */
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110 extern DECLSPEC void SDLCALL SDL_KillThread(SDL_Thread *thread);
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111
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112
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113 /* Ends C function definitions when using C++ */
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114 #ifdef __cplusplus
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115 }
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116 #endif
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117 #include "close_code.h"
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118
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119 #endif /* _SDL_thread_h */