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SDL_thread.h
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2011 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
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slouken@libsdl.org
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*/
#ifndef _SDL_thread_h
#define _SDL_thread_h
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* \file SDL_thread.h
*
* Header for the SDL thread management routines.
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#include "SDL_stdinc.h"
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#include "SDL_error.h"
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/* Thread synchronization primitives */
#include "SDL_mutex.h"
#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
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/* *INDENT-OFF* */
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extern "C" {
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/* *INDENT-ON* */
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#endif
/* The SDL thread structure, defined in SDL_thread.c */
struct SDL_Thread;
typedef struct SDL_Thread SDL_Thread;
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/* The SDL thread ID */
typedef unsigned long SDL_threadID;
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/* The SDL thread priority
*
* Note: On many systems you require special privileges to set high priority.
*/
typedef enum {
SDL_THREAD_PRIORITY_LOW,
SDL_THREAD_PRIORITY_NORMAL,
SDL_THREAD_PRIORITY_HIGH
} SDL_ThreadPriority;
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/* The function passed to SDL_CreateThread()
It is passed a void* user context parameter and returns an int.
*/
typedef int (SDLCALL * SDL_ThreadFunction) (void *data);
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#if defined(__WIN32__) && !defined(HAVE_LIBC)
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/**
* \file SDL_thread.h
*
* We compile SDL into a DLL. 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!
*/
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#define SDL_PASSED_BEGINTHREAD_ENDTHREAD
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#ifndef _WIN32_WCE
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#include <process.h> /* This has _beginthread() and _endthread() defined! */
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#endif
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#ifdef __GNUC__
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typedef unsigned long (__cdecl * pfnSDL_CurrentBeginThread) (void *, unsigned,
unsigned
(__stdcall *
func) (void *),
void *arg,
unsigned,
unsigned
*threadID);
typedef void (__cdecl * pfnSDL_CurrentEndThread) (unsigned code);
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typedef uintptr_t(__cdecl * pfnSDL_CurrentBeginThread) (void *, unsigned,
unsigned (__stdcall *
func) (void
*),
void *arg, unsigned,
unsigned *threadID);
typedef void (__cdecl * pfnSDL_CurrentEndThread) (unsigned code);
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/**
* Create a thread.
*/
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extern DECLSPEC SDL_Thread *SDLCALL
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SDL_CreateThread(SDL_ThreadFunction fn, void *data,
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pfnSDL_CurrentBeginThread pfnBeginThread,
pfnSDL_CurrentEndThread pfnEndThread);
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#if defined(_WIN32_WCE)
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/**
* Create a thread.
*/
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#define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, NULL, NULL)
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/**
* Create a thread.
*/
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#define SDL_CreateThread(fn, data) SDL_CreateThread(fn, data, _beginthreadex, _endthreadex)
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#else
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/**
* Create a thread.
*/
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extern DECLSPEC SDL_Thread *SDLCALL
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SDL_CreateThread(SDL_ThreadFunction fn, void *data);
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#endif
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/**
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* Get the thread identifier for the current thread.
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*/
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extern DECLSPEC SDL_threadID SDLCALL SDL_ThreadID(void);
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/**
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* Get the thread identifier for the specified thread.
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*
* Equivalent to SDL_ThreadID() if the specified thread is NULL.
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*/
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extern DECLSPEC SDL_threadID SDLCALL SDL_GetThreadID(SDL_Thread * thread);
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* Set the priority for the current thread
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extern DECLSPEC int SDLCALL SDL_SetThreadPriority(SDL_ThreadPriority priority);
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/**
* Wait for a thread to finish.
*
* The return code for the thread function is placed in the area
* pointed to by \c status, if \c status is not NULL.
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*/
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extern DECLSPEC void SDLCALL SDL_WaitThread(SDL_Thread * thread, int *status);
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/* Ends C function definitions when using C++ */
#ifdef __cplusplus
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/* *INDENT-OFF* */
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}
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/* *INDENT-ON* */
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#endif
#include "close_code.h"
#endif /* _SDL_thread_h */
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/* vi: set ts=4 sw=4 expandtab: */