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84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
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/*
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Copyright (c) 2007-2011 iMatix Corporation
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Copyright (c) 2007-2011 Other 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_MTRIE_HPP_INCLUDED__
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#define __ZMQ_MTRIE_HPP_INCLUDED__
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#include <stddef.h>
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#include <set>
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#include "stdint.hpp"
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namespace zmq
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{
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// Multi-trie. Each node in the trie is a set of pointers to pipes.
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class mtrie_t
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{
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public:
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typedef std::set <class pipe_t*> pipes_t;
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mtrie_t ();
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~mtrie_t ();
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// Add key to the trie. Returns true if it's a new subscription
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// rather than a duplicate.
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bool add (unsigned char *prefix_, size_t size_, class pipe_t *pipe_);
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// Remove all subscriptions for a specific peer from the trie.
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// If there are no subscriptions left on some topics, invoke the
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// supplied callback function.
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void rm (class pipe_t *pipe_,
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void (*func_) (unsigned char *data_, size_t size_, void *arg_),
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void *arg_);
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// Remove specific subscription from the trie. Return true is it was
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// actually removed rather than de-duplicated.
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bool rm (unsigned char *prefix_, size_t size_, class pipe_t *pipe_);
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// Get all matching pipes.
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void match (unsigned char *data_, size_t size_, pipes_t &pipes_);
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private:
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void rm_helper (class pipe_t *pipe_, unsigned char **buff_,
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size_t buffsize_, size_t maxbuffsize_,
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void (*func_) (unsigned char *data_, size_t size_, void *arg_),
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void *arg_);
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pipes_t pipes;
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unsigned char min;
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unsigned short count;
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union {
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class mtrie_t *node;
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class mtrie_t **table;
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} next;
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mtrie_t (const mtrie_t&);
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const mtrie_t &operator = (const mtrie_t&);
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};
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}
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#endif
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