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68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
/*
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* The contents of this file are subject to the Initial
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* Developer's Public License Version 1.0 (the "License");
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* you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
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*
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* Software distributed under the License is distributed AS IS,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied.
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* See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Original Code was created by Dmitry Yemanov
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* for the Firebird Open Source RDBMS project.
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*
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* Copyright (c) 2006 Dmitry Yemanov <dimitr@users.sf.net>
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* and all contributors signed below.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*/
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#ifndef CLASSES_FILE_H
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#define CLASSES_FILE_H
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#include "../common/classes/array.h"
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#if !defined(SOLARIS) && !defined(AIX)
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typedef FB_UINT64 offset_t;
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#endif
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namespace Firebird {
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class File
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{
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public:
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virtual ~File() {}
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virtual size_t read(offset_t, void*, size_t) = 0;
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virtual size_t write(offset_t, const void*, size_t) = 0;
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virtual void unlink() = 0;
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virtual offset_t getSize() const = 0;
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};
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class ZeroBuffer
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{
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static const size_t DEFAULT_SIZE = 1024 * 256;
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public:
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explicit ZeroBuffer(MemoryPool& p, size_t size = DEFAULT_SIZE)
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: buffer(p)
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{
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memset(buffer.getBuffer(size), 0, size);
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}
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const char* getBuffer() const { return buffer.begin(); }
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size_t getSize() const { return buffer.getCount(); }
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private:
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Firebird::Array<char> buffer;
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};
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} // namespace
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#endif // CLASSES_FILE_H
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