--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/commsfwutils/commsbufs/inc/systemsharedasyncalloc.h	Thu Dec 17 09:22:25 2009 +0200
@@ -0,0 +1,114 @@
+// 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 "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: Asynchronous allocation from the system shared buffer pool
+//
+
+#ifndef __SYSTEMSHAREDASYNCALLOC_H__
+#define __SYSTEMSHAREDASYNCALLOC_H__
+
+#include <es_commsbuf.h>
+#include <elements/rworkerlock.h>
+
+/**
+Notifies the asyncronous request completion or error
+
+@internalTechnology
+*/
+class MAsyncAllocNotifier 
+	{
+	public:
+	virtual void OnCompletion() =0;
+	virtual void OnError(TInt aError) =0;
+	};
+
+class CSystemSharedBufPool;
+
+/**
+Asynchronous allocation from the single system shared pool  
+
+@internalTechnology
+
+*/
+NONSHARABLE_CLASS(CSystemSharedPoolAsyncAlloc) : public CActive
+	{
+	friend class CSystemSharedAsyncAlloc;
+	public:
+	CSystemSharedPoolAsyncAlloc(CSystemSharedBufPool& aPool, MAsyncAllocNotifier& aNotifer);	
+	~CSystemSharedPoolAsyncAlloc();
+	
+	void Activate(TInt aFreeBufs);
+	void Deactivate();
+	private:
+	// From CActive
+	void RunL();
+	TInt RunError(TInt aError);
+	void DoCancel();
+	
+	private:
+	CSystemSharedBufPool&	iPool;
+	MAsyncAllocNotifier&	iNotifier;
+	};
+
+class CSystemSharedBufPool;
+/**
+Manages the asynchronous allocation from the system shared pools.
+@internalTechnology
+
+*/
+NONSHARABLE_CLASS(CSystemSharedAsyncAlloc) : public CActive, public MAsyncAllocNotifier
+	{
+	enum TAsyncRequestState
+	    {
+	    EMakeRequest = 0,
+	    ECancelRequest,
+	    };
+	
+	public:
+	static CSystemSharedAsyncAlloc* New(const RPointerArray<CSystemSharedBufPool>& aPools);
+	~CSystemSharedAsyncAlloc();
+	void StartRequest(CCommsBufAsyncRequest& aRequest);
+	void CancelRequest(CCommsBufAsyncRequest& aRequest);
+	
+	private:
+	CSystemSharedAsyncAlloc();
+	TInt Construct(const RPointerArray<CSystemSharedBufPool>& aPools);	
+	void MakePoolAsyncRequest();
+	void MakePoolRequest();
+	void CancelPoolAsyncRequest();
+	void CancelAllPoolRequest();
+	
+	void ActivateSelf();
+	void CompleteSelf();
+	void CancelSelf();
+	
+   // From MAsyncAllocNotifier
+    virtual void OnCompletion();
+    virtual void OnError(TInt aError);  
+
+    // From CActive
+    void RunL();
+    void DoCancel();
+
+    void CompleteAsyncAllocs(); 
+    
+	
+	private:
+	RPointerArray<CSystemSharedPoolAsyncAlloc> 	iAsyncAllocPools;
+	TAsyncRequestState                  iRequestState;
+    RThread                             iOwnerThread;
+    TBool                               iSignalled;
+    RWorkerLock                         iAsynAllocLock;
+    TDblQue<CCommsBufAsyncRequest>      iAllocsPending;     
+	};
+
+#endif // __SYSTEMSHAREDASYNCALLOC_H__