forked from premiere/premiere-libtorrent
83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/*
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Copyright (c) 2009-2014, 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_ALLOCATOR_HPP_INCLUDED
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#define TORRENT_ALLOCATOR_HPP_INCLUDED
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#include <cstddef>
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#include "libtorrent/config.hpp"
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namespace libtorrent
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{
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TORRENT_EXTRA_EXPORT int page_size();
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struct TORRENT_EXTRA_EXPORT page_aligned_allocator
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{
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typedef std::size_t size_type;
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typedef std::ptrdiff_t difference_type;
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static char* malloc(const size_type bytes);
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static void free(char* block);
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#ifdef TORRENT_DEBUG_BUFFERS
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static bool in_use(char const* block);
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#endif
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};
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struct TORRENT_EXTRA_EXPORT aligned_holder
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{
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aligned_holder(): m_buf(0) {}
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aligned_holder(int size): m_buf(page_aligned_allocator::malloc(size)) {}
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~aligned_holder() { if (m_buf) page_aligned_allocator::free(m_buf); }
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char* get() const { return m_buf; }
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void reset(char* buf = 0)
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{
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if (m_buf) page_aligned_allocator::free(m_buf);
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m_buf = buf;
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}
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void swap(aligned_holder& h)
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{
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char* tmp = m_buf;
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m_buf = h.m_buf;
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h.m_buf = tmp;
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}
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private:
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aligned_holder(aligned_holder const&);
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aligned_holder& operator=(aligned_holder const&);
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char* m_buf;
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};
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}
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#endif
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