+++ /dev/null
-/*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997-2009 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_mutex_h
-#define _SDL_mutex_h
-
-/** @file SDL_mutex.h
- * Functions to provide thread synchronization primitives
- *
- * @note These are independent of the other SDL routines.
- */
-
-#include "SDL_stdinc.h"
-#include "SDL_error.h"
-
-#include "begin_code.h"
-/* Set up for C function definitions, even when using C++ */
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** Synchronization functions which can time out return this value
- * if they time out.
- */
-#define SDL_MUTEX_TIMEDOUT 1
-
-/** This is the timeout value which corresponds to never time out */
-#define SDL_MUTEX_MAXWAIT (~(Uint32)0)
-
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/** @name Mutex functions */ /*@{*/
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-/** The SDL mutex structure, defined in SDL_mutex.c */
-struct SDL_mutex;
-typedef struct SDL_mutex SDL_mutex;
-
-/** Create a mutex, initialized unlocked */
-extern DECLSPEC SDL_mutex * SDLCALL SDL_CreateMutex(void);
-
-#define SDL_LockMutex(m) SDL_mutexP(m)
-/** Lock the mutex
- * @return 0, or -1 on error
- */
-extern DECLSPEC int SDLCALL SDL_mutexP(SDL_mutex *mutex);
-
-#define SDL_UnlockMutex(m) SDL_mutexV(m)
-/** Unlock the mutex
- * @return 0, or -1 on error
- *
- * It is an error to unlock a mutex that has not been locked by
- * the current thread, and doing so results in undefined behavior.
- */
-extern DECLSPEC int SDLCALL SDL_mutexV(SDL_mutex *mutex);
-
-/** Destroy a mutex */
-extern DECLSPEC void SDLCALL SDL_DestroyMutex(SDL_mutex *mutex);
-
-/*@}*/
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/** @name Semaphore functions */ /*@{*/
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-/** The SDL semaphore structure, defined in SDL_sem.c */
-struct SDL_semaphore;
-typedef struct SDL_semaphore SDL_sem;
-
-/** Create a semaphore, initialized with value, returns NULL on failure. */
-extern DECLSPEC SDL_sem * SDLCALL SDL_CreateSemaphore(Uint32 initial_value);
-
-/** Destroy a semaphore */
-extern DECLSPEC void SDLCALL SDL_DestroySemaphore(SDL_sem *sem);
-
-/**
- * This function suspends the calling thread until the semaphore pointed
- * to by sem has a positive count. It then atomically decreases the semaphore
- * count.
- */
-extern DECLSPEC int SDLCALL SDL_SemWait(SDL_sem *sem);
-
-/** Non-blocking variant of SDL_SemWait().
- * @return 0 if the wait succeeds,
- * SDL_MUTEX_TIMEDOUT if the wait would block, and -1 on error.
- */
-extern DECLSPEC int SDLCALL SDL_SemTryWait(SDL_sem *sem);
-
-/** Variant of SDL_SemWait() with a timeout in milliseconds, returns 0 if
- * the wait succeeds, SDL_MUTEX_TIMEDOUT if the wait does not succeed in
- * the allotted time, and -1 on error.
- *
- * On some platforms this function is implemented by looping with a delay
- * of 1 ms, and so should be avoided if possible.
- */
-extern DECLSPEC int SDLCALL SDL_SemWaitTimeout(SDL_sem *sem, Uint32 ms);
-
-/** Atomically increases the semaphore's count (not blocking).
- * @return 0, or -1 on error.
- */
-extern DECLSPEC int SDLCALL SDL_SemPost(SDL_sem *sem);
-
-/** Returns the current count of the semaphore */
-extern DECLSPEC Uint32 SDLCALL SDL_SemValue(SDL_sem *sem);
-
-/*@}*/
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/** @name Condition_variable_functions */ /*@{*/
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
-/*@{*/
-/** The SDL condition variable structure, defined in SDL_cond.c */
-struct SDL_cond;
-typedef struct SDL_cond SDL_cond;
-/*@}*/
-
-/** Create a condition variable */
-extern DECLSPEC SDL_cond * SDLCALL SDL_CreateCond(void);
-
-/** Destroy a condition variable */
-extern DECLSPEC void SDLCALL SDL_DestroyCond(SDL_cond *cond);
-
-/** Restart one of the threads that are waiting on the condition variable,
- * @return 0 or -1 on error.
- */
-extern DECLSPEC int SDLCALL SDL_CondSignal(SDL_cond *cond);
-
-/** Restart all threads that are waiting on the condition variable,
- * @return 0 or -1 on error.
- */
-extern DECLSPEC int SDLCALL SDL_CondBroadcast(SDL_cond *cond);
-
-/** Wait on the condition variable, unlocking the provided mutex.
- * The mutex must be locked before entering this function!
- * The mutex is re-locked once the condition variable is signaled.
- * @return 0 when it is signaled, or -1 on error.
- */
-extern DECLSPEC int SDLCALL SDL_CondWait(SDL_cond *cond, SDL_mutex *mut);
-
-/** Waits for at most 'ms' milliseconds, and returns 0 if the condition
- * variable is signaled, SDL_MUTEX_TIMEDOUT if the condition is not
- * signaled in the allotted time, and -1 on error.
- * On some platforms this function is implemented by looping with a delay
- * of 1 ms, and so should be avoided if possible.
- */
-extern DECLSPEC int SDLCALL SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms);
-
-/*@}*/
-
-/* Ends C function definitions when using C++ */
-#ifdef __cplusplus
-}
-#endif
-#include "close_code.h"
-
-#endif /* _SDL_mutex_h */
-
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