93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
/*
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Copyright (c) 2008-2018, 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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namespace libtorrent {
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disk_buffer_holder::disk_buffer_holder(buffer_allocator_interface& alloc
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, char* buf, std::size_t sz) noexcept
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: m_allocator(&alloc), m_buf(buf), m_size(sz), m_ref()
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{}
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disk_buffer_holder& disk_buffer_holder::operator=(disk_buffer_holder&& h) & noexcept
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{
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if (&h == this) return *this;
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disk_buffer_holder(std::move(h)).swap(*this);
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return *this;
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}
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disk_buffer_holder::disk_buffer_holder(disk_buffer_holder&& h) noexcept
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: m_allocator(h.m_allocator), m_buf(h.m_buf), m_size(h.m_size), m_ref(h.m_ref)
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{
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// we own this buffer now
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h.m_buf = nullptr;
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h.m_ref = aux::block_cache_reference();
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}
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disk_buffer_holder::disk_buffer_holder(buffer_allocator_interface& alloc
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, aux::block_cache_reference const& ref, char* buf
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, std::size_t sz) noexcept
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: m_allocator(&alloc), m_buf(buf), m_size(sz), m_ref(ref)
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{}
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void disk_buffer_holder::reset(aux::block_cache_reference const& ref, char* buf, std::size_t const sz)
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{
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if (m_ref.cookie != aux::block_cache_reference::none) m_allocator->reclaim_blocks(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_size = sz;
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m_ref = ref;
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}
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void disk_buffer_holder::reset(char* const buf, std::size_t const sz)
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{
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if (m_ref.cookie != aux::block_cache_reference::none) m_allocator->reclaim_blocks(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_size = sz;
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m_ref = aux::block_cache_reference();
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}
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char* disk_buffer_holder::release() noexcept
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{
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TORRENT_ASSERT(m_ref.cookie == aux::block_cache_reference::none);
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char* ret = m_buf;
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m_buf = nullptr;
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m_size = 0;
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m_ref = aux::block_cache_reference();
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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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