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/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Xerces" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache\@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation, and was
* originally based on software copyright (c) 1999, International
* Business Machines, Inc., http://www.ibm.com . For more information
* on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
/*
* $Log$
* Revision 1.1 2003/10/09 13:51:16 neilg
* implementation of a StringPool implementation that permits thread-safe updates. This can now be used by a grammar pool that is locked so that scanners have somehwere to store information about newly-encountered URIs
*
*/
#if !defined(SYNCHRONIZEDSTRINGPOOL_HPP)
#define SYNCHRONIZEDSTRINGPOOL_HPP
#include <xercesc/framework/MemoryManager.hpp>
#include <xercesc/util/StringPool.hpp>
#include <xercesc/util/Mutexes.hpp>
XERCES_CPP_NAMESPACE_BEGIN
//
// This class provides a synchronized string pool implementation.
// This will necessarily be slower than the regular StringPool, so it
// should only be used when updates need to be made in a thread-safe
// way. Updates will be made on datastructures local to this object;
// all queries that don't involve mutation will first be directed at
// the StringPool implementation with which this object is
// constructed.
class XMLUTIL_EXPORT XMLSynchronizedStringPool : public XMLStringPool
{
public :
// -----------------------------------------------------------------------
// Constructors and Destructor
// -----------------------------------------------------------------------
XMLSynchronizedStringPool
(
const XMLStringPool * constPool
, const unsigned int modulus = 109
, MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager
);
virtual ~XMLSynchronizedStringPool();
// -----------------------------------------------------------------------
// Pool management methods
// -----------------------------------------------------------------------
virtual unsigned int addOrFind(const XMLCh* const newString);
virtual bool exists(const XMLCh* const newString) const;
virtual bool exists(const unsigned int id) const;
virtual void flushAll();
virtual unsigned int getId(const XMLCh* const toFind) const;
virtual const XMLCh* getValueForId(const unsigned int id) const;
virtual unsigned int getStringCount() const;
private :
// -----------------------------------------------------------------------
// Unimplemented constructors and operators
// -----------------------------------------------------------------------
XMLSynchronizedStringPool(const XMLSynchronizedStringPool&);
XMLSynchronizedStringPool& operator=(const XMLSynchronizedStringPool&);
// -----------------------------------------------------------------------
// private data members
// fConstPool
// the pool whose immutability we're protecting
// fMutex
// mutex to permit synchronous updates of our StringPool
const XMLStringPool* fConstPool;
XMLMutex fMutex;
};
XERCES_CPP_NAMESPACE_END
#endif