userlibandfileserver/fileserver/sfile/sf_pool.cpp
author Mike Kinghan <mikek@symbian.org>
Tue, 16 Nov 2010 14:39:21 +0000
branchGCC_SURGE
changeset 303 9b85206a602c
parent 0 a41df078684a
child 245 647ab20fee2e
permissions -rw-r--r--
We need a way to pass flags to rombuilds in Raptor via extension flm interfaces, so that the CPP pass of the rom input files can be informed what toolchain we are building with and conditionally include or exclude files depending on whether the toolchain could build them.

// Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// This component and the accompanying materials are made available
// under the terms of the License "Eclipse Public License v1.0"
// which accompanies this distribution, and is available
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
// f32\sfile\sf_pool.cpp
// 
//

#include "sf_pool.h"
#ifdef SYMBIAN_F32_ENHANCED_CHANGE_NOTIFICATION	
#include "sf_notifier.h"
#endif //SYMBIAN_F32_ENHANCED_CHANGE_NOTIFICATION	

//=====CFsPool=============================

template <class T>
CFsPool<T>* CFsPool<T>::New(TInt aPoolSize)
	{
	CFsPool<T>* pool = new CFsPool<T>();
	if(!pool)
		return NULL;
	
	TInt r = pool->Construct(aPoolSize);
	if(r!=KErrNone)
		{
		delete pool;
		return NULL;
		}
	else
		return pool;
	}


template <class T>
CFsPool<T>::CFsPool()
	{
	}

template <class T>
TInt CFsPool<T>::Construct(TInt aPoolSize)
	{
	TInt r = iPoolLock.CreateLocal(KNotificationPoolSize);
	if(r != KErrNone)
			return r;
	
	r = iFreeList.Reserve(KNotificationPoolSize);
	if(r != KErrNone)
		return r;
	
	TInt i = 0;
	while(i < aPoolSize)
		{
		T* t = T::New();
		if(!t)
			{
			return KErrNoMemory;
			}
		iFreeList.Append(t);	
		i++;
		}
	
	return KErrNone; 
	}

//This should only be called by the Manager when it holds
//the manager's write lock meaning that all of the
//blocks should be unallocated 
template <class T>
CFsPool<T>::~CFsPool()
	{
	for(TInt i=0; i < iFreeList.Count(); i++)
		{
		delete iFreeList[i];
		}
	iFreeList.Close();
	}


template <class T>
T* CFsPool<T>::Allocate()
	{
	Lock(); //Waits when there are no free blocks left

	TInt lastIndex = iFreeList.Count()-1;
	T* t = iFreeList[lastIndex];
	iFreeList.Remove(lastIndex);
	
	return t;
	}

template <class T>
void CFsPool<T>::Free(T* aBlock)
	{
	iFreeList.Append(aBlock);
	Unlock();
	}

template <class T>
void CFsPool<T>::Lock()
	{
	iPoolLock.Wait();
	}

template <class T>
void CFsPool<T>::Unlock()
	{
	iPoolLock.Signal();
	}

#ifdef SYMBIAN_F32_ENHANCED_CHANGE_NOTIFICATION	
//This is needed here because the compiler needs to know which types will be 
//instantiating the template (because it's in a separate file)
template class CFsPool<CFsNotificationBlock>;
#endif //SYMBIAN_F32_ENHANCED_CHANGE_NOTIFICATION