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66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
// mmap.cpp
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/**
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* Copyright (C) 2008 10gen Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "stdafx.h"
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#include "mmap.h"
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namespace mongo {
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set<MemoryMappedFile*> mmfiles;
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MemoryMappedFile::~MemoryMappedFile() {
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close();
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mmfiles.erase(this);
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}
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void MemoryMappedFile::created(){
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mmfiles.insert(this);
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}
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/*static*/
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int closingAllFiles = 0;
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void MemoryMappedFile::closeAllFiles( stringstream &message ) {
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if ( closingAllFiles ) {
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message << "warning closingAllFiles=" << closingAllFiles << endl;
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return;
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}
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++closingAllFiles;
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for ( set<MemoryMappedFile*>::iterator i = mmfiles.begin(); i != mmfiles.end(); i++ )
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(*i)->close();
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message << " closeAllFiles() finished" << endl;
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--closingAllFiles;
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}
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void MemoryMappedFile::updateLength( const char *filename, int &length ) {
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if ( !boost::filesystem::exists( filename ) )
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return;
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// make sure we map full length if preexisting file.
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boost::uintmax_t l = boost::filesystem::file_size( filename );
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assert( l <= 0x7fffffff );
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length = (int) l;
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}
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void* MemoryMappedFile::map(const char *filename) {
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boost::uintmax_t l = boost::filesystem::file_size( filename );
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assert( l <= 0x7fffffff );
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int i = (int) l;
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return map( filename , i );
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}
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} // namespace mongo
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