1 /* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2012 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 /** @file SDL_thread.h 27 * Header for the SDL thread management routines 28 * 29 * @note These are independent of the other SDL routines. 30 */ 31 32 #include "SDL_stdinc.h" 33 #include "SDL_error.h" 34 35 /* Thread synchronization primitives */ 36 #include "SDL_mutex.h" 37 38 #include "begin_code.h" 39 /* Set up for C function definitions, even when using C++ */ 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 /** The SDL thread structure, defined in SDL_thread.c */ 45 struct SDL_Thread; 46 typedef struct SDL_Thread SDL_Thread; 47 48 /** Create a thread */ 49 #if ((defined(__WIN32__) && !defined(HAVE_LIBC)) || defined(__OS2__)) && !defined(__SYMBIAN32__) 50 /** 51 * We compile SDL into a DLL on OS/2. This means, that it's the DLL which 52 * creates a new thread for the calling process with the SDL_CreateThread() 53 * API. There is a problem with this, that only the RTL of the SDL.DLL will 54 * be initialized for those threads, and not the RTL of the calling application! 55 * To solve this, we make a little hack here. 56 * We'll always use the caller's _beginthread() and _endthread() APIs to 57 * start a new thread. This way, if it's the SDL.DLL which uses this API, 58 * then the RTL of SDL.DLL will be used to create the new thread, and if it's 59 * the application, then the RTL of the application will be used. 60 * So, in short: 61 * Always use the _beginthread() and _endthread() of the calling runtime library! 62 */ 63 #define SDL_PASSED_BEGINTHREAD_ENDTHREAD 64 #ifndef _WIN32_WCE 65 #include <process.h> /* This has _beginthread() and _endthread() defined! */ 66 #endif 67 68 #ifdef __OS2__ 69 typedef int (*pfnSDL_CurrentBeginThread)(void (*func)(void *), void *, unsigned, void *arg); 70 typedef void (*pfnSDL_CurrentEndThread)(void); 71 #else 72 typedef uintptr_t (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned, 73 unsigned (__stdcall *func)(void *), void *arg, 74 unsigned, unsigned *threadID); 75 typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code); 76 #endif 77 78 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread); 79 80 #ifdef __OS2__ 81 #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, _beginthread, _endthread) 82 #elif defined(_WIN32_WCE) 83 #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, NULL, NULL) 84 #else 85 #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, _beginthreadex, _endthreadex) 86 #endif 87 #else 88 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data); 89 #endif 90 91 /** Get the 32-bit thread identifier for the current thread */ 92 extern DECLSPEC Uint32 SDLCALL SDL_ThreadID(void); 93 94 /** Get the 32-bit thread identifier for the specified thread, 95 * equivalent to SDL_ThreadID() if the specified thread is NULL. 96 */ 97 extern DECLSPEC Uint32 SDLCALL SDL_GetThreadID(SDL_Thread *thread); 98 99 /** Wait for a thread to finish. 100 * The return code for the thread function is placed in the area 101 * pointed to by 'status', if 'status' is not NULL. 102 */ 103 extern DECLSPEC void SDLCALL SDL_WaitThread(SDL_Thread *thread, int *status); 104 105 /** Forcefully kill a thread without worrying about its state */ 106 extern DECLSPEC void SDLCALL SDL_KillThread(SDL_Thread *thread); 107 108 109 /* Ends C function definitions when using C++ */ 110 #ifdef __cplusplus 111 } 112 #endif 113 #include "close_code.h" 114 115 #endif /* _SDL_thread_h */ 116
