92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
/*
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Copyright (c) 2007-2012, 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_INTRUSIVE_PTR_BASE
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#define TORRENT_INTRUSIVE_PTR_BASE
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#include <boost/detail/atomic_count.hpp>
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#include <boost/checked_delete.hpp>
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#include <boost/intrusive_ptr.hpp>
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#include "libtorrent/config.hpp"
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#include "libtorrent/assert.hpp"
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namespace libtorrent
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{
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template<class T>
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struct intrusive_ptr_base
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{
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intrusive_ptr_base(intrusive_ptr_base<T> const&)
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: m_refs(0) {}
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intrusive_ptr_base& operator=(intrusive_ptr_base const& rhs)
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{ return *this; }
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friend void intrusive_ptr_add_ref(intrusive_ptr_base<T> const* s)
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{
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TORRENT_ASSERT(s != 0);
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TORRENT_ASSERT(s->m_refs >= 0);
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++s->m_refs;
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}
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friend void intrusive_ptr_release(intrusive_ptr_base<T> const* s)
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{
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TORRENT_ASSERT(s != 0);
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TORRENT_ASSERT(s->m_refs > 0);
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if (--s->m_refs == 0)
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boost::checked_delete(static_cast<T const*>(s));
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}
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boost::intrusive_ptr<T> self()
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{ return boost::intrusive_ptr<T>((T*)this); }
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boost::intrusive_ptr<const T> self() const
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{ return boost::intrusive_ptr<const T>((T const*)this); }
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int refcount() const { return m_refs; }
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intrusive_ptr_base(): m_refs(0) {}
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// so that we can access this when logging
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#if !defined TORRENT_LOGGING \
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&& !defined TORRENT_VERBOSE_LOGGING \
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&& !defined TORRENT_ERROR_LOGGING
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private:
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#endif
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// reference counter for intrusive_ptr
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mutable boost::detail::atomic_count m_refs;
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};
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}
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#endif
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