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/*
Copyright (c) 2007-2009 FastMQ Inc.
This file is part of 0MQ.
0MQ is free software; you can redistribute it and/or modify it under
the terms of the Lesser GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
0MQ is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
Lesser GNU General Public License for more details.
You should have received a copy of the Lesser GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ZMQ_IO_OBJECT_HPP_INCLUDED__
#define __ZMQ_IO_OBJECT_HPP_INCLUDED__
#include "object.hpp"
#include "i_poller.hpp"
#include "i_poll_events.hpp"
namespace zmq
{
class io_object_t : public object_t, public i_poll_events
{
public:
// I/O object will live in the thread inherited from the parent.
// However, it's lifetime is managed by the owner.
io_object_t (class io_thread_t *parent_, object_t *owner_);
protected:
// Ask owner socket to terminate this I/O object. This may not happen
void term ();
// I/O object destroys itself. No point in allowing others to invoke
// the destructor. At the same time, it has to be virtual so that
// generic io_object deallocation mechanism destroys specific type
// of I/O object correctly.
virtual ~io_object_t ();
// Handlers for incoming commands. It vital that every I/O object
// invokes io_object_t::process_plug at the end of it's own plug
// handler.
void process_plug ();
// io_object_t defines a new handler used to disconnect the object
// from the poller object. Implement the handlen in the derived
// classes to ensure sane cleanup.
virtual void process_unplug () = 0;
// Methods to access underlying poller object.
handle_t add_fd (fd_t fd_);
void rm_fd (handle_t handle_);
void set_pollin (handle_t handle_);
void reset_pollin (handle_t handle_);
void set_pollout (handle_t handle_);
void reset_pollout (handle_t handle_);
void add_timer ();
void cancel_timer ();
// i_poll_events interface implementation.
void in_event ();
void out_event ();
void timer_event ();
// Socket owning this I/O object. It is responsible for destroying
// it when it's being closed.
object_t *owner;
private:
// Set to true when object is plugged in.
bool plugged_in;
// Set to true when object was terminated before it was plugged in.
// In such case destruction is delayed till 'plug' command arrives.
bool terminated;
struct i_poller *poller;
// Handlers for incoming commands.
void process_term ();
io_object_t (const io_object_t&);
void operator = (const io_object_t&);
};
}
#endif
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