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Add even more of the source

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This should be about everything needed to build so far?
This commit is contained in:
Darren VanBuren 2017-03-07 17:14:16 -08:00
parent af3619d4fa
commit 849723c9cf
547 changed files with 149239 additions and 0 deletions
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CommonUtilitiesLib/OSBufferPool.cpp Normal file
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/*
*
* @APPLE_LICENSE_HEADER_START@
*
* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*
*/
/*
File: OSBufferPool.cpp
Contains: Fast access to fixed size buffers.
Written By: Denis Serenyi
*/
#include "OSBufferPool.h"
#include "OSMemory.h"
void* OSBufferPool::Get()
{
OSMutexLocker locker(&fMutex);
if (fQueue.GetLength() == 0)
{
fTotNumBuffers++;
char* theNewBuf = NEW char[fBufSize + sizeof(OSQueueElem)];
//
// We need to construct a Queue Element, but we don't actually need
// to use it in this function, so to avoid a compiler warning just
// don't assign the result to anything.
(void)new (theNewBuf) OSQueueElem(theNewBuf + sizeof(OSQueueElem));
return theNewBuf + sizeof(OSQueueElem);
}
return fQueue.DeQueue()->GetEnclosingObject();
}
void OSBufferPool::Put(void* inBuffer)
{
OSMutexLocker locker(&fMutex);
fQueue.EnQueue((OSQueueElem*)((char*)inBuffer - sizeof(OSQueueElem)));
}