1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2006 Sam Lantinga 4 5 This library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 This library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with this library; if not, write to the Free Software 17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 18 19 Sam Lantinga 20 slouken (at) libsdl.org 21 */ 22 23 #ifndef _SDL_thread_h 24 #define _SDL_thread_h 25 26 /* Header for the SDL thread management routines 27 28 These are independent of the other SDL routines. 29 */ 30 31 #include "SDL_stdinc.h" 32 #include "SDL_error.h" 33 34 /* Thread synchronization primitives */ 35 #include "SDL_mutex.h" 36 37 #include "begin_code.h" 38 /* Set up for C function definitions, even when using C++ */ 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 /* The SDL thread structure, defined in SDL_thread.c */ 44 struct SDL_Thread; 45 typedef struct SDL_Thread SDL_Thread; 46 47 /* Create a thread */ 48 #if ((defined(__WIN32__) && !defined(HAVE_LIBC)) || defined(__OS2__)) && !defined(__SYMBIAN32__) 49 /* 50 We compile SDL into a DLL on OS/2. This means, that it's the DLL which 51 creates a new thread for the calling process with the SDL_CreateThread() 52 API. There is a problem with this, that only the RTL of the SDL.DLL will 53 be initialized for those threads, and not the RTL of the calling application! 54 To solve this, we make a little hack here. 55 We'll always use the caller's _beginthread() and _endthread() APIs to 56 start a new thread. This way, if it's the SDL.DLL which uses this API, 57 then the RTL of SDL.DLL will be used to create the new thread, and if it's 58 the application, then the RTL of the application will be used. 59 So, in short: 60 Always use the _beginthread() and _endthread() of the calling runtime library! 61 */ 62 #define SDL_PASSED_BEGINTHREAD_ENDTHREAD 63 #ifndef _WIN32_WCE 64 #include <process.h> /* This has _beginthread() and _endthread() defined! */ 65 #endif 66 67 #ifdef __OS2__ 68 typedef int (*pfnSDL_CurrentBeginThread)(void (*func)(void *), void *, unsigned, void *arg); 69 typedef void (*pfnSDL_CurrentEndThread)(void); 70 #elif __GNUC__ 71 typedef unsigned long (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned, 72 unsigned (__stdcall *func)(void *), void *arg, 73 unsigned, unsigned *threadID); 74 typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code); 75 #else 76 typedef uintptr_t (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned, 77 unsigned (__stdcall *func)(void *), void *arg, 78 unsigned, unsigned *threadID); 79 typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code); 80 #endif 81 82 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread); 83 84 #ifdef __OS2__ 85 #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, _beginthread, _endthread) 86 #elif defined(_WIN32_WCE) 87 #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, NULL, NULL) 88 #else 89 #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, _beginthreadex, _endthreadex) 90 #endif 91 #else 92 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data); 93 #endif 94 95 /* Get the 32-bit thread identifier for the current thread */ 96 extern DECLSPEC Uint32 SDLCALL SDL_ThreadID(void); 97 98 /* Get the 32-bit thread identifier for the specified thread, 99 equivalent to SDL_ThreadID() if the specified thread is NULL. 100 */ 101 extern DECLSPEC Uint32 SDLCALL SDL_GetThreadID(SDL_Thread *thread); 102 103 /* Wait for a thread to finish. 104 The return code for the thread function is placed in the area 105 pointed to by 'status', if 'status' is not NULL. 106 */ 107 extern DECLSPEC void SDLCALL SDL_WaitThread(SDL_Thread *thread, int *status); 108 109 /* Forcefully kill a thread without worrying about its state */ 110 extern DECLSPEC void SDLCALL SDL_KillThread(SDL_Thread *thread); 111 112 113 /* Ends C function definitions when using C++ */ 114 #ifdef __cplusplus 115 } 116 #endif 117 #include "close_code.h" 118 119 #endif /* _SDL_thread_h */ 120
