[2674] | 1 | /* |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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| 3 | * contributor license agreements. See the NOTICE file distributed with |
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| 4 | * this work for additional information regarding copyright ownership. |
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| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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| 6 | * (the "License"); you may not use this file except in compliance with |
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| 7 | * the License. You may obtain a copy of the License at |
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| 8 | * |
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| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 10 | * |
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| 11 | * Unless required by applicable law or agreed to in writing, software |
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| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 14 | * See the License for the specific language governing permissions and |
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| 15 | * limitations under the License. |
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| 16 | */ |
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| 17 | |
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| 18 | /* |
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| 19 | * $Id: SynchronizedStringPool.hpp 568078 2007-08-21 11:43:25Z amassari $ |
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| 20 | */ |
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| 21 | |
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| 22 | #if !defined(SYNCHRONIZEDSTRINGPOOL_HPP) |
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| 23 | #define SYNCHRONIZEDSTRINGPOOL_HPP |
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| 24 | |
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| 25 | #include <xercesc/framework/MemoryManager.hpp> |
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| 26 | #include <xercesc/util/StringPool.hpp> |
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| 27 | #include <xercesc/util/Mutexes.hpp> |
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| 28 | |
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| 29 | XERCES_CPP_NAMESPACE_BEGIN |
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| 30 | |
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| 31 | // |
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| 32 | // This class provides a synchronized string pool implementation. |
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| 33 | // This will necessarily be slower than the regular StringPool, so it |
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| 34 | // should only be used when updates need to be made in a thread-safe |
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| 35 | // way. Updates will be made on datastructures local to this object; |
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| 36 | // all queries that don't involve mutation will first be directed at |
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| 37 | // the StringPool implementation with which this object is |
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| 38 | // constructed. |
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| 39 | class XMLUTIL_EXPORT XMLSynchronizedStringPool : public XMLStringPool |
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| 40 | { |
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| 41 | public : |
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| 42 | // ----------------------------------------------------------------------- |
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| 43 | // Constructors and Destructor |
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| 44 | // ----------------------------------------------------------------------- |
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| 45 | XMLSynchronizedStringPool |
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| 46 | ( |
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| 47 | const XMLStringPool * constPool |
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| 48 | , const unsigned int modulus = 109 |
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| 49 | , MemoryManager* const manager = XMLPlatformUtils::fgMemoryManager |
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| 50 | ); |
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| 51 | virtual ~XMLSynchronizedStringPool(); |
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| 52 | |
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| 53 | |
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| 54 | // ----------------------------------------------------------------------- |
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| 55 | // Pool management methods |
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| 56 | // ----------------------------------------------------------------------- |
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| 57 | virtual unsigned int addOrFind(const XMLCh* const newString); |
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| 58 | virtual bool exists(const XMLCh* const newString) const; |
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| 59 | virtual bool exists(const unsigned int id) const; |
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| 60 | virtual void flushAll(); |
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| 61 | virtual unsigned int getId(const XMLCh* const toFind) const; |
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| 62 | virtual const XMLCh* getValueForId(const unsigned int id) const; |
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| 63 | virtual unsigned int getStringCount() const; |
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| 64 | |
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| 65 | |
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| 66 | private : |
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| 67 | // ----------------------------------------------------------------------- |
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| 68 | // Unimplemented constructors and operators |
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| 69 | // ----------------------------------------------------------------------- |
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| 70 | XMLSynchronizedStringPool(const XMLSynchronizedStringPool&); |
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| 71 | XMLSynchronizedStringPool& operator=(const XMLSynchronizedStringPool&); |
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| 72 | |
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| 73 | |
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| 74 | // ----------------------------------------------------------------------- |
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| 75 | // private data members |
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| 76 | // fConstPool |
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| 77 | // the pool whose immutability we're protecting |
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| 78 | // fMutex |
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| 79 | // mutex to permit synchronous updates of our StringPool |
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| 80 | const XMLStringPool* fConstPool; |
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| 81 | XMLMutex fMutex; |
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| 82 | }; |
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| 83 | |
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| 84 | XERCES_CPP_NAMESPACE_END |
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| 85 | |
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| 86 | #endif |
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