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da31917f4f
Relicense permission collected from all relevant authors as tallied at: https://github.com/rlenferink/libzmq-relicense/blob/master/checklist.md The relicense grants are collected under RELICENSE/ and will be moved to the above repository in a later commit. Fixes https://github.com/zeromq/libzmq/issues/2376
59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
/* SPDX-License-Identifier: MPL-2.0 */
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#ifndef __ZMQ_LB_HPP_INCLUDED__
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#define __ZMQ_LB_HPP_INCLUDED__
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#include "array.hpp"
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namespace zmq
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{
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class msg_t;
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class pipe_t;
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// This class manages a set of outbound pipes. On send it load balances
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// messages fairly among the pipes.
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class lb_t
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{
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public:
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lb_t ();
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~lb_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 send (msg_t *msg_);
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// Sends a message and stores the pipe that was used in pipe_.
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// It is possible for this function to return success but keep pipe_
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// unset if the rest of a multipart message to a terminated pipe is
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// being dropped. For the first frame, this will never happen.
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int sendpipe (msg_t *msg_, pipe_t **pipe_);
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bool has_out ();
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private:
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// List of outbound pipes.
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typedef array_t<pipe_t, 2> 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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// Points to the last pipe that the most recent message was sent to.
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pipes_t::size_type _current;
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// True if last we are in the middle of a multipart message.
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bool _more;
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// True if we are dropping current message.
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bool _dropping;
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ZMQ_NON_COPYABLE_NOR_MOVABLE (lb_t)
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};
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}
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#endif
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