93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
/*
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Copyright (c) 2007, 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 OBSERVER_HPP
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#define OBSERVER_HPP
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#include <boost/pool/pool.hpp>
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#include <boost/detail/atomic_count.hpp>
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#include <boost/intrusive_ptr.hpp>
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namespace libtorrent {
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namespace dht {
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struct observer;
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struct msg;
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// defined in rpc_manager.cpp
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TORRENT_EXPORT void intrusive_ptr_add_ref(observer const*);
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TORRENT_EXPORT void intrusive_ptr_release(observer const*);
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struct observer : boost::noncopyable
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{
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friend TORRENT_EXPORT void intrusive_ptr_add_ref(observer const*);
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friend TORRENT_EXPORT void intrusive_ptr_release(observer const*);
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observer(boost::pool<>& p)
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: sent(time_now())
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, pool_allocator(p)
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, m_refs(0)
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{}
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virtual ~observer() {}
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// these two callbacks lets the observer add
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// information to the message before it's sent
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virtual void send(msg& m) = 0;
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// this is called when a reply is received
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virtual void reply(msg const& m) = 0;
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// this is called when no reply has been received within
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// some timeout
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virtual void timeout() = 0;
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// if this is called the destructor should
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// not invoke any new messages, and should
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// only clean up. It means the rpc-manager
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// is being destructed
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virtual void abort() = 0;
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udp::endpoint target_addr;
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ptime sent;
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private:
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boost::pool<>& pool_allocator;
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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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typedef boost::intrusive_ptr<observer> observer_ptr;
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} }
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#endif
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