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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 __ZS_SESSION_HPP_INCLUDED__
#define __ZS_SESSION_HPP_INCLUDED__
#include "i_session.hpp"
#include "safe_object.hpp"
#include "stdint.hpp"
#include "atomic_counter.hpp"
namespace zs
{
// Object that encapsulates both mux and demux.
class session_t : public safe_object_t, public i_session
{
public:
// Creates the session object.
session_t (struct object_t *parent_, struct i_thread *thread_,
struct i_mux *mux_, struct i_demux *demux_,
bool terminate_on_disconnect_, bool terminate_on_no_pipes_);
// i_session implementation
void set_engine (struct i_engine *engine_);
void shutdown ();
bool read (struct zs_msg *msg_);
bool write (struct zs_msg *msg_);
void flush ();
// Called by the engine when it is being closed.
void disconnected ();
// Creates a message flow between this session and the peer session.
// If in_ is true, the messages can flow from the peer to ourselves.
// If out_ is true, messages can flow from ourselves to the peer.
// It's assumed that peer's seqnum was already incremented.
void bind (class object_t *peer_, bool in_, bool out_);
// Called by mux if new messages are available.
void revive ();
// Functions to set & retrieve index of this MD in thread's array
// of session objects.
void set_index (int index_);
int get_index ();
private:
// Clean-up.
~session_t ();
// Terminate is private here. It is called by either when disconnected
// or no_pipes event occurs.
void terminate ();
void process_bind (class pipe_reader_t *reader_,
class session_t *peer_);
void process_reg (class simple_semaphore_t *smph_);
void process_reg_and_bind (class session_t *peer_,
bool flow_in_, bool flow_out_);
void process_engine (i_engine *engine_);
struct i_mux *mux;
struct i_demux *demux;
struct i_thread *thread;
struct i_engine *engine;
// If true termination of the session can be triggered by engine
// disconnect/close.
bool terminate_on_disconnect;
// If true termination of the session can be triggered when the last
// pipe detaches from it.
bool terminate_on_no_pipes;
// If true, terminate_on_no_pipes should be set when at least one
// pipe was bound.
bool terminate_on_no_pipes_delayed;
// Index in thread's session array.
int index;
};
}
#endif
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