SDLOSXCAGuard.h - Android社区 - https://www.androidos.net.cn/

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 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
    Library General Public License for more details.

You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Sam Lantinga
    slouken@libsdl.org
*/
#include "SDL_config.h"

/*  
    Note: This file hasn't been modified so technically we have to keep the disclaimer :-(

Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.
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            please do not use, install, modify or redistribute this Apple software.

In consideration of your agreement to abide by the following terms, and subject
            to these terms, Apple grants you a personal, non-exclusive license, under Apple�s
            copyrights in this original Apple software (the "Apple Software"), to use,
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            Apple Software without specific prior written permission from Apple.  Except as
            expressly stated in this notice, no other rights or licenses, express or implied,
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The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO
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IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
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*/
/*=============================================================================
    CAGuard.h

=============================================================================*/
#if !defined(__CAGuard_h__)
#define __CAGuard_h__

/*=============================================================================
    Includes
  =============================================================================*/

#include <CoreAudio/CoreAudioTypes.h>
#include <pthread.h>

/*=============================================================================
    CAGuard
  
    This is your typical mutex with signalling implemented via pthreads.
    Lock() will return true if and only if the guard is locked on that call.
    A thread that already has the guard will receive 'false' if it locks it
    again. Use of the stack-based CAGuard::Locker class is highly recommended
    to properly manage the recursive nesting. The Wait calls with timeouts
    will return true if and only if the timeout period expired. They will
    return false if they receive notification any other way.
  =============================================================================*/

typedef struct S_SDLOSXCAGuard
{

/*  Construction/Destruction */
/*public:*/
/*  Actions */
/*public:*/
    int     (*Lock)(struct S_SDLOSXCAGuard *cag);
    void    (*Unlock)(struct S_SDLOSXCAGuard *cag);
    int     (*Try)(struct S_SDLOSXCAGuard *cag, int *outWasLocked);    /* returns true if lock is free, false if not */
    void    (*Wait)(struct S_SDLOSXCAGuard *cag);
    void    (*Notify)(struct S_SDLOSXCAGuard *cag);

/*  Implementation */
/*protected:*/
    pthread_mutex_t mMutex;
    pthread_cond_t  mCondVar;
    pthread_t       mOwner;
} SDLOSXCAGuard;

SDLOSXCAGuard *new_SDLOSXCAGuard(void);
void delete_SDLOSXCAGuard(SDLOSXCAGuard *cag);

#endif

C++程序 | 117行 | 5.42 KB

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