96 lines
3.6 KiB
C++
96 lines
3.6 KiB
C++
/*
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Copyright (c) 2008-2015, 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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#include "libtorrent/disk_buffer_holder.hpp"
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#include "libtorrent/aux_/session_impl.hpp"
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#include "libtorrent/disk_io_thread.hpp"
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namespace libtorrent
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{
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disk_buffer_holder::disk_buffer_holder(buffer_allocator_interface& alloc, char* buf)
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: m_allocator(alloc), m_buf(buf)
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{
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m_ref.storage = 0;
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m_ref.piece = -1;
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m_ref.block = -1;
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}
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disk_buffer_holder::disk_buffer_holder(buffer_allocator_interface& alloc, disk_io_job const& j)
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: m_allocator(alloc), m_buf(j.buffer.disk_block), m_ref(j.d.io.ref)
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{
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TORRENT_ASSERT(m_ref.storage == 0 || m_ref.piece >= 0);
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TORRENT_ASSERT(m_ref.storage == 0 || m_ref.block >= 0);
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TORRENT_ASSERT(m_ref.storage == 0 || m_ref.piece < static_cast<piece_manager*>(m_ref.storage)->files()->num_pieces());
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TORRENT_ASSERT(m_ref.storage == 0 || m_ref.block <= static_cast<piece_manager*>(m_ref.storage)->files()->piece_length() / 0x4000);
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TORRENT_ASSERT(j.action != disk_io_job::save_resume_data);
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TORRENT_ASSERT(j.action != disk_io_job::rename_file);
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TORRENT_ASSERT(j.action != disk_io_job::move_storage);
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}
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void disk_buffer_holder::reset(disk_io_job const& j)
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{
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if (m_ref.storage) m_allocator.reclaim_block(m_ref);
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else if (m_buf) m_allocator.free_disk_buffer(m_buf);
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m_buf = j.buffer.disk_block;
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m_ref = j.d.io.ref;
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TORRENT_ASSERT(m_ref.piece >= 0);
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TORRENT_ASSERT(m_ref.storage != 0);
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TORRENT_ASSERT(m_ref.block >= 0);
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TORRENT_ASSERT(m_ref.piece < static_cast<piece_manager*>(m_ref.storage)->files()->num_pieces());
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TORRENT_ASSERT(m_ref.block <= static_cast<piece_manager*>(m_ref.storage)->files()->piece_length() / 0x4000);
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TORRENT_ASSERT(j.action != disk_io_job::save_resume_data);
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TORRENT_ASSERT(j.action != disk_io_job::rename_file);
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TORRENT_ASSERT(j.action != disk_io_job::move_storage);
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}
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void disk_buffer_holder::reset(char* buf)
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{
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if (m_ref.storage) m_allocator.reclaim_block(m_ref);
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else if (m_buf) m_allocator.free_disk_buffer(m_buf);
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m_buf = buf;
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m_ref.storage = 0;
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}
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char* disk_buffer_holder::release()
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{
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char* ret = m_buf;
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m_buf = 0;
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m_ref.storage = 0;
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return ret;
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}
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disk_buffer_holder::~disk_buffer_holder() { reset(); }
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}
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