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95 lines
2.7 KiB
C++
95 lines
2.7 KiB
C++
/*
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** critsec.cpp
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**
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**---------------------------------------------------------------------------
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** Copyright 2006-2016 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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** Wraps an SDL mutex object. (A critical section is a Windows synchronization
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** object similar to a mutex but optimized for access by threads belonging to
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** only one process, hence the class name.)
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*/
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#include "SDL.h"
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#include "SDL_thread.h"
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#include "i_system.h"
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class FInternalCriticalSection
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{
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public:
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FInternalCriticalSection()
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{
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CritSec = SDL_CreateMutex();
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if (CritSec == NULL)
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{
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I_FatalError("Failed to create a critical section mutex.");
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}
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}
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~FInternalCriticalSection()
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{
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if (CritSec != NULL)
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{
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SDL_DestroyMutex(CritSec);
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}
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}
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void Enter()
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{
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if (SDL_mutexP(CritSec) != 0)
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{
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I_FatalError("Failed entering a critical section.");
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}
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}
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void Leave()
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{
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if (SDL_mutexV(CritSec) != 0)
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{
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I_FatalError("Failed to leave a critical section.");
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}
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}
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private:
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SDL_mutex *CritSec;
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};
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FInternalCriticalSection *CreateCriticalSection()
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{
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return new FInternalCriticalSection();
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}
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void DeleteCriticalSection(FInternalCriticalSection *c)
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{
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delete c;
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}
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void EnterCriticalSection(FInternalCriticalSection *c)
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{
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c->Enter();
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}
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void LeaveCriticalSection(FInternalCriticalSection *c)
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{
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c->Leave();
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}
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