Line data    Source code

       1             : /*
       2             :     Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
       3             : 
       4             :     This file is part of libzmq, the ZeroMQ core engine in C++.
       5             : 
       6             :     libzmq is free software; you can redistribute it and/or modify it under
       7             :     the terms of the GNU Lesser General Public License (LGPL) as published
       8             :     by the Free Software Foundation; either version 3 of the License, or
       9             :     (at your option) any later version.
      10             : 
      11             :     As a special exception, the Contributors give you permission to link
      12             :     this library with independent modules to produce an executable,
      13             :     regardless of the license terms of these independent modules, and to
      14             :     copy and distribute the resulting executable under terms of your choice,
      15             :     provided that you also meet, for each linked independent module, the
      16             :     terms and conditions of the license of that module. An independent
      17             :     module is a module which is not derived from or based on this library.
      18             :     If you modify this library, you must extend this exception to your
      19             :     version of the library.
      20             : 
      21             :     libzmq is distributed in the hope that it will be useful, but WITHOUT
      22             :     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      23             :     FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
      24             :     License for more details.
      25             : 
      26             :     You should have received a copy of the GNU Lesser General Public License
      27             :     along with this program.  If not, see <http://www.gnu.org/licenses/>.
      28             : */
      29             : 
      30             : #ifndef __ZMQ_METADATA_HPP_INCLUDED__
      31             : #define __ZMQ_METADATA_HPP_INCLUDED__
      32             : 
      33             : #include <map>
      34             : #include <string>
      35             : 
      36             : #include "atomic_counter.hpp"
      37             : 
      38             : namespace zmq
      39             : {
      40        7602 :     class metadata_t
      41             :     {
      42             :         public:
      43             :             typedef std::map <std::string, std::string> dict_t;
      44             : 
      45             :             metadata_t (const dict_t &dict);
      46             : 
      47             :             //  Returns pointer to property value or NULL if
      48             :             //  property is not found.
      49             :             const char *get (const std::string &property) const;
      50             : 
      51             :             void add_ref ();
      52             : 
      53             :             //  Drop reference. Returns true iff the reference
      54             :             //  counter drops to zero.
      55             :             bool drop_ref ();
      56             : 
      57             :         private:
      58             :             metadata_t(const metadata_t&);
      59             :             metadata_t & operator=(const metadata_t&);
      60             : 
      61             :             //  Reference counter.
      62             :             atomic_counter_t ref_cnt;
      63             : 
      64             :             //  Dictionary holding metadata.
      65             :             dict_t dict;
      66             :     };
      67             : 
      68             : }
      69             : 
      70             : #endif