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e46ec31209
The get_credential () member function returns credential for the last peer we received message for. The idea is that this function is used to implement user-level API.
83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
/*
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Copyright (c) 2007-2014 Contributors as noted in the AUTHORS file
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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 GNU Lesser 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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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser 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_FQ_HPP_INCLUDED__
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#define __ZMQ_FQ_HPP_INCLUDED__
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#include "array.hpp"
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#include "blob.hpp"
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#include "pipe.hpp"
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#include "msg.hpp"
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namespace zmq
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{
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// Class manages a set of inbound pipes. On receive it performs fair
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// queueing so that senders gone berserk won't cause denial of
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// service for decent senders.
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class fq_t
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{
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public:
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fq_t ();
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~fq_t ();
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void attach (pipe_t *pipe_);
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void activated (pipe_t *pipe_);
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void pipe_terminated (pipe_t *pipe_);
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int recv (msg_t *msg_);
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int recvpipe (msg_t *msg_, pipe_t **pipe_);
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bool has_in ();
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blob_t get_credential () const;
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private:
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// Inbound pipes.
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typedef array_t <pipe_t, 1> pipes_t;
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pipes_t pipes;
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// Number of active pipes. All the active pipes are located at the
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// beginning of the pipes array.
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pipes_t::size_type active;
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// Pointer to the last pipe we received message from.
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// NULL when no message has been received or the pipe
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// has terminated.
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pipe_t *last_in;
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// Index of the next bound pipe to read a message from.
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pipes_t::size_type current;
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// If true, part of a multipart message was already received, but
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// there are following parts still waiting in the current pipe.
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bool more;
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// Holds credential after the last_acive_pipe has terminated.
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blob_t saved_credential;
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fq_t (const fq_t&);
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const fq_t &operator = (const fq_t&);
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};
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}
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#endif
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