// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).+
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// All rights reserved.+
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// This component and the accompanying materials are made available+
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// under the terms of "Eclipse Public License v1.0"+
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// which accompanies this distribution, and is available+
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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//+
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// Initial Contributors:+
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// Nokia Corporation - initial contribution.+
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//+
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// Contributors:+
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//+
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// Description:+
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// Implements the avdtp allocators+
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// +
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//+
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+
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/**+
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 @file+
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 @internalComponent+
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*/+
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+
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#include "avdtpAllocators.h"+
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+
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TInt TBitFieldAllocator::Get(TInt& aValue, TInt aMax, TInt aMin/*=0*/)+
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	{+
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	if (aMax<aMin)+
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		{+
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		return KErrArgument;+
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		}+
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	if ((aMax-aMin)>((8*sizeof(iBitField))-1))+
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		{+
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		// this class supports 64 values/bits at present+
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		return KErrTooBig;+
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		}+
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	// bit 1 represents the use of val=min,bit 2 use of val=min+1, etc+
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	for (TInt bit=0;bit<=(aMax-aMin);bit++)+
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		{+
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		if (!(iBitField & (1<<bit)))+
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			{+
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			iMin = aMin;+
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			// it's free, mark it+
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			iBitField |= (1<<bit);+
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			aValue = bit+iMin;+
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			return KErrNone;+
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			}+
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		}	+
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	return KErrInUse;+
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	}+
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	+
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+
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void TBitFieldAllocator::Free(TInt aValue)+
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	{+
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	TInt bitPos = aValue-iMin;+
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#ifdef _DEBUG+
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	if (!(iBitField & (1<<bitPos)))+
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		{+
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		// freeing an unclaimed bit - maybe due to a leave, but allow checking+
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		__DEBUGGER();+
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		}+
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#endif+
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	//Clear the bit in iSpace corresponding to aBitPos+
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	iBitField &= (~(1<<bitPos));	+
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	}+
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+
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