163 lines
4.4 KiB
C++
163 lines
4.4 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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#include <boost/cstdint.hpp>
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#include <libtorrent/ptime.hpp>
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#include <libtorrent/address.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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struct traversal_algorithm;
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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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// intended struct layout (on 32 bit architectures)
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// offset size alignment field
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// 0 8 8 sent
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// 8 8 4 m_refs
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// 16 4 4 pool_allocator
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// 20 16 4 m_addr
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// 36 2 2 m_port
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// 38 1 1 m_is_v6, m_short_timeout, m_in_constructor, m_was_sent
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// 39 1 1 <padding>
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// 40
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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::intrusive_ptr<traversal_algorithm> const& a)
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: m_sent()
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, m_refs(0)
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, m_algorithm(a)
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, m_is_v6(false)
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, m_short_timeout(false)
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, m_done(false)
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{
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TORRENT_ASSERT(a);
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#ifdef TORRENT_DEBUG
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m_in_constructor = true;
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m_was_sent = false;
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#endif
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}
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virtual ~observer();
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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 if no response has been received after
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// a few seconds, before the request has timed out
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void short_timeout();
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bool has_short_timeout() const { return m_short_timeout; }
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// this is called when no reply has been received within
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// some timeout
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void timeout();
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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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void abort();
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ptime sent() const { return m_sent; }
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void set_target(udp::endpoint const& ep);
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address target_addr() const;
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udp::endpoint target_ep() const;
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void set_transaction_id(boost::uint16_t tid)
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{ m_transaction_id = tid; }
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boost::uint16_t transaction_id() const
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{ return m_transaction_id; }
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#ifndef TORRENT_DHT_VERBOSE_LOGGING
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protected:
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#endif
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void done();
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ptime m_sent;
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// reference counter for intrusive_ptr
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mutable boost::detail::atomic_count m_refs;
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const boost::intrusive_ptr<traversal_algorithm> m_algorithm;
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TORRENT_UNION addr_t
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{
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#if TORRENT_USE_IPV6
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address_v6::bytes_type v6;
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#endif
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address_v4::bytes_type v4;
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} m_addr;
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boost::uint16_t m_port;
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// the transaction ID for this call
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boost::uint16_t m_transaction_id;
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bool m_is_v6:1;
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bool m_short_timeout:1;
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// when true, this observer has reported
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// back to the traversal algorithm already
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bool m_done:1;
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#ifdef TORRENT_DEBUG
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public:
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bool m_in_constructor:1;
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bool m_was_sent:1;
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#endif
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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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