87 lines
3.4 KiB
C++
87 lines
3.4 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* $Id: SynchronizedStringPool.hpp 527149 2007-04-10 14:56:39Z amassari $
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*/
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#if !defined(XERCESC_INCLUDE_GUARD_SYNCHRONIZEDSTRINGPOOL_HPP)
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#define XERCESC_INCLUDE_GUARD_SYNCHRONIZEDSTRINGPOOL_HPP
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#include <xercesc/framework/MemoryManager.hpp>
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#include <xercesc/util/StringPool.hpp>
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#include <xercesc/util/Mutexes.hpp>
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XERCES_CPP_NAMESPACE_BEGIN
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//
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// This class provides a synchronized string pool implementation.
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// This will necessarily be slower than the regular XMLStringPool, so it
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// should only be used when updates need to be made in a thread-safe
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// way. Updates will be made on datastructures local to this object;
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// all queries that don't involve mutation will first be directed at
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// the XMLStringPool implementation with which this object is
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// constructed.
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class XMLUTIL_EXPORT XMLSynchronizedStringPool : public XMLStringPool
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{
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public :
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// -----------------------------------------------------------------------
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// Constructors and Destructor
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// -----------------------------------------------------------------------
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XMLSynchronizedStringPool
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(
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const XMLStringPool * constPool
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, const unsigned int modulus = 109
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, MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager
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);
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virtual ~XMLSynchronizedStringPool();
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// -----------------------------------------------------------------------
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// Pool management methods
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// -----------------------------------------------------------------------
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virtual unsigned int addOrFind(const XMLCh* const newString);
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virtual bool exists(const XMLCh* const newString) const;
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virtual bool exists(const unsigned int id) const;
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virtual void flushAll();
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virtual unsigned int getId(const XMLCh* const toFind) const;
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virtual const XMLCh* getValueForId(const unsigned int id) const;
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virtual unsigned int getStringCount() const;
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private :
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// -----------------------------------------------------------------------
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// Unimplemented constructors and operators
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// -----------------------------------------------------------------------
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XMLSynchronizedStringPool(const XMLSynchronizedStringPool&);
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XMLSynchronizedStringPool& operator=(const XMLSynchronizedStringPool&);
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// -----------------------------------------------------------------------
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// private data members
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// fConstPool
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// the pool whose immutability we're protecting
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// fMutex
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// mutex to permit synchronous updates of our StringPool
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const XMLStringPool* fConstPool;
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XMLMutex fMutex;
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};
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XERCES_CPP_NAMESPACE_END
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#endif
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