metadata.hpp

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/* SPDX-License-Identifier: MPL-2.0 */
 
#ifndef __ZMQ_METADATA_HPP_INCLUDED__
#define __ZMQ_METADATA_HPP_INCLUDED__
 
#include <map>
#include <string>
 
#include "atomic_counter.hpp"
 
namespace zmq
{
class metadata_t
{
  public:
    typedef std::map<std::string, std::string> dict_t;
 
    metadata_t (const dict_t &dict_);
 
    //  Returns pointer to property value or NULL if
    //  property is not found.
    const char *get (const std::string &property_) const;
 
    void add_ref ();
 
    //  Drop reference. Returns true iff the reference
    //  counter drops to zero.
    bool drop_ref ();
 
  private:
    //  Reference counter.
    atomic_counter_t _ref_cnt;
 
    //  Dictionary holding metadata.
    const dict_t _dict;
 
    ZMQ_NON_COPYABLE_NOR_MOVABLE (metadata_t)
};
}
 
#endif