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90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
/*
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Copyright (c) 2007-2010 iMatix Corporation
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This file is part of 0MQ.
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0MQ is free software; you can redistribute it and/or modify it under
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the terms of the Lesser GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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Lesser GNU General Public License for more details.
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You should have received a copy of the Lesser GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __ZMQ_OWNED_HPP_INCLUDED__
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#define __ZMQ_OWNED_HPP_INCLUDED__
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#include "socket_base.hpp"
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#include "atomic_counter.hpp"
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#include "stdint.hpp"
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namespace zmq
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{
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// Base class for objects owned by individual sockets. Handles
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// initialisation and destruction of such objects.
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class owned_t : public object_t
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{
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public:
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// The object will live in parent's thread, however, its lifetime
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// will be managed by its owner socket.
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owned_t (object_t *parent_, socket_base_t *owner_);
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// When another owned object wants to send command to this object
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// it calls this function to let it know it should not shut down
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// before the command is delivered.
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void inc_seqnum ();
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protected:
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// Ask owner socket to terminate this object.
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void term ();
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// Derived object destroys owned_t. No point in allowing others to
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// invoke the destructor. At the same time, it has to be virtual so
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// that generic owned_t deallocation mechanism destroys specific type
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// of the owned object correctly.
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virtual ~owned_t ();
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// io_object_t defines a new handler used to disconnect the object
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// from the poller object. Implement the handlen in the derived
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// classes to ensure sane cleanup.
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virtual void process_unplug () = 0;
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// Socket owning this object. When the socket is being closed it's
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// responsible for shutting down this object.
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socket_base_t *owner;
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private:
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// Handlers for incoming commands.
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void process_term ();
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void process_seqnum ();
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void finalise ();
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// Sequence number of the last command sent to this object.
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atomic_counter_t sent_seqnum;
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// Sequence number of the last command processed by this object.
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uint64_t processed_seqnum;
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// If true, the object is already shutting down.
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bool shutting_down;
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owned_t (const owned_t&);
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void operator = (const owned_t&);
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};
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}
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#endif
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