SDL_thread.h
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上传日期:2022-06-22
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- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2006 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with this library; if not, write to the Free Software
- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifndef _SDL_thread_h
- #define _SDL_thread_h
- /* Header for the SDL thread management routines
- These are independent of the other SDL routines.
- */
- #include "SDL_stdinc.h"
- #include "SDL_error.h"
- /* Thread synchronization primitives */
- #include "SDL_mutex.h"
- #include "begin_code.h"
- /* Set up for C function definitions, even when using C++ */
- #ifdef __cplusplus
- extern "C" {
- #endif
- /* The SDL thread structure, defined in SDL_thread.c */
- struct SDL_Thread;
- typedef struct SDL_Thread SDL_Thread;
- /* Create a thread */
- #if ((defined(__WIN32__) && !defined(HAVE_LIBC)) || defined(__OS2__)) && !defined(__SYMBIAN32__)
- /*
- We compile SDL into a DLL on OS/2. This means, that it's the DLL which
- creates a new thread for the calling process with the SDL_CreateThread()
- API. There is a problem with this, that only the RTL of the SDL.DLL will
- be initialized for those threads, and not the RTL of the calling application!
- To solve this, we make a little hack here.
- We'll always use the caller's _beginthread() and _endthread() APIs to
- start a new thread. This way, if it's the SDL.DLL which uses this API,
- then the RTL of SDL.DLL will be used to create the new thread, and if it's
- the application, then the RTL of the application will be used.
- So, in short:
- Always use the _beginthread() and _endthread() of the calling runtime library!
- */
- #define SDL_PASSED_BEGINTHREAD_ENDTHREAD
- #ifndef _WIN32_WCE
- #include <process.h> /* This has _beginthread() and _endthread() defined! */
- #endif
- #ifdef __OS2__
- typedef int (*pfnSDL_CurrentBeginThread)(void (*func)(void *), void *, unsigned, void *arg);
- typedef void (*pfnSDL_CurrentEndThread)(void);
- #elif __GNUC__
- typedef unsigned long (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
- unsigned (__stdcall *func)(void *), void *arg,
- unsigned, unsigned *threadID);
- typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
- #else
- typedef uintptr_t (__cdecl *pfnSDL_CurrentBeginThread) (void *, unsigned,
- unsigned (__stdcall *func)(void *), void *arg,
- unsigned, unsigned *threadID);
- typedef void (__cdecl *pfnSDL_CurrentEndThread)(unsigned code);
- #endif
- extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread);
- #ifdef __OS2__
- #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, _beginthread, _endthread)
- #elif defined(_WIN32_WCE)
- #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, NULL, NULL)
- #else
- #define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, _beginthreadex, _endthreadex)
- #endif
- #else
- extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data);
- #endif
- /* Get the 32-bit thread identifier for the current thread */
- extern DECLSPEC Uint32 SDLCALL SDL_ThreadID(void);
- /* Get the 32-bit thread identifier for the specified thread,
- equivalent to SDL_ThreadID() if the specified thread is NULL.
- */
- extern DECLSPEC Uint32 SDLCALL SDL_GetThreadID(SDL_Thread *thread);
- /* Wait for a thread to finish.
- The return code for the thread function is placed in the area
- pointed to by 'status', if 'status' is not NULL.
- */
- extern DECLSPEC void SDLCALL SDL_WaitThread(SDL_Thread *thread, int *status);
- /* Forcefully kill a thread without worrying about its state */
- extern DECLSPEC void SDLCALL SDL_KillThread(SDL_Thread *thread);
- /* Ends C function definitions when using C++ */
- #ifdef __cplusplus
- }
- #endif
- #include "close_code.h"
- #endif /* _SDL_thread_h */