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00001 /* 00002 * Licensed to the Apache Software Foundation (ASF) under one or more 00003 * contributor license agreements. See the NOTICE file distributed with 00004 * this work for additional information regarding copyright ownership. 00005 * The ASF licenses this file to You under the Apache License, Version 2.0 00006 * (the "License"); you may not use this file except in compliance with 00007 * the License. You may obtain a copy of the License at 00008 * 00009 * http://www.apache.org/licenses/LICENSE-2.0 00010 * 00011 * Unless required by applicable law or agreed to in writing, software 00012 * distributed under the License is distributed on an "AS IS" BASIS, 00013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00014 * See the License for the specific language governing permissions and 00015 * limitations under the License. 00016 */ 00017 00023 // --------------------------------------------------------------------------- 00024 // Includes 00025 // --------------------------------------------------------------------------- 00026 //#include <string.h> 00027 #include <xercesc/framework/XMLBufferMgr.hpp> 00028 #include <xercesc/util/RuntimeException.hpp> 00029 00030 XERCES_CPP_NAMESPACE_BEGIN 00031 00032 // --------------------------------------------------------------------------- 00033 // Constructors and Destructor 00034 // --------------------------------------------------------------------------- 00035 XMLBufferMgr::XMLBufferMgr(MemoryManager* const manager) : 00036 00037 fBufCount(32) 00038 , fMemoryManager(manager) 00039 , fBufList(0) 00040 { 00041 // Allocate the buffer list and zero it out 00042 fBufList = (XMLBuffer**) fMemoryManager->allocate(fBufCount * sizeof(XMLBuffer*)); // new XMLBuffer*[fBufCount]; 00043 for (XMLSize_t index = 0; index < fBufCount; index++) 00044 fBufList[index] = 0; 00045 } 00046 00047 XMLBufferMgr::~XMLBufferMgr() 00048 { 00049 // Delete any buffers that got allocated 00050 for (XMLSize_t index = 0; index < fBufCount; index++) 00051 delete fBufList[index]; 00052 00053 // And then the buffer list 00054 fMemoryManager->deallocate(fBufList); //delete [] fBufList; 00055 } 00056 00057 00058 // --------------------------------------------------------------------------- 00059 // Buffer management 00060 // --------------------------------------------------------------------------- 00061 XMLBuffer& XMLBufferMgr::bidOnBuffer() 00062 { 00063 // 00064 // Look for a buffer that is not in use. If we hit a null entry, then 00065 // we have to add one. 00066 // 00067 for (XMLSize_t index = 0; index < fBufCount; index++) 00068 { 00069 // No more buffers available, so create one and take it 00070 if (!fBufList[index]) 00071 { 00072 fBufList[index] = new (fMemoryManager) XMLBuffer(1023, fMemoryManager); 00073 fBufList[index]->setInUse(true); 00074 return *fBufList[index]; 00075 } 00076 00077 // 00078 // There's one here, so see if its use. If not, mark it, reset it, 00079 // and take it 00080 // 00081 if (!fBufList[index]->getInUse()) 00082 { 00083 fBufList[index]->reset(); 00084 fBufList[index]->setInUse(true); 00085 return *(fBufList[index]); 00086 } 00087 } 00088 00089 // We did not find one, so freak out 00090 ThrowXMLwithMemMgr(RuntimeException, XMLExcepts::BufMgr_NoMoreBuffers, fMemoryManager); 00091 00092 // NOTE: Dummy return to make some compilers happy. Never really gets called! 00093 return *fBufList[0]; 00094 } 00095 00096 00097 void XMLBufferMgr::releaseBuffer(XMLBuffer& toRelease) 00098 { 00099 // Look for this buffer in the list 00100 for (XMLSize_t index = 0; index < fBufCount; index++) 00101 { 00102 if (fBufList[index] == &toRelease) 00103 { 00104 // Unmark it 00105 toRelease.setInUse(false); 00106 return; 00107 } 00108 } 00109 00110 // It was not a legal buffer 00111 ThrowXMLwithMemMgr(RuntimeException, XMLExcepts::BufMgr_BufferNotInPool, fMemoryManager); 00112 } 00113 00114 XERCES_CPP_NAMESPACE_END