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43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
// mmap.h
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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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#pragma once
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class MemoryMappedFile {
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public:
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static void closeAllFiles();
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MemoryMappedFile();
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~MemoryMappedFile(); /* closes the file if open */
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void close();
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/* only smart enough right now to deal with files of a fixed length.
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creates if DNE
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*/
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void* map(const char *filename, int length);
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void flush(bool sync);
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void* viewOfs() { return view; }
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private:
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HANDLE fd;
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HANDLE maphandle;
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void *view;
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int len;
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};
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