75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
/*
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Copyright (c) 2008, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TORRENT_DISK_BUFFER_HOLDER_HPP_INCLUDED
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#define TORRENT_DISK_BUFFER_HOLDER_HPP_INCLUDED
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#include "libtorrent/config.hpp"
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#include "libtorrent/assert.hpp"
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#include <algorithm>
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namespace libtorrent
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{
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namespace aux { struct session_impl; }
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struct disk_buffer_pool;
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struct TORRENT_EXPORT disk_buffer_holder
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{
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disk_buffer_holder(aux::session_impl& ses, char* buf);
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disk_buffer_holder(disk_buffer_pool& disk_pool, char* buf);
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disk_buffer_holder(disk_buffer_pool& disk_pool, char* buf, int num_blocks);
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~disk_buffer_holder();
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char* release();
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char* get() const { return m_buf; }
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void reset(char* buf = 0, int num_blocks = 1);
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void swap(disk_buffer_holder& h)
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{
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TORRENT_ASSERT(&h.m_disk_pool == &m_disk_pool);
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std::swap(h.m_buf, m_buf);
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}
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typedef char* (disk_buffer_holder::*unspecified_bool_type)();
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operator unspecified_bool_type() const
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{ return m_buf == 0? 0: &disk_buffer_holder::release; }
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private:
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disk_buffer_pool& m_disk_pool;
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char* m_buf;
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int m_num_blocks;
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};
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}
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#endif
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