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/*
   Copyright (c) 2011 Daniel Bakkelund.
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:
    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
    3. Neither the name of the copyright holders nor the names of its
       contributors may be used to endorse or promote products derived from
       this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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*/

#ifndef CPUNIT_STRINGFLYWEIGHTSTORE_HPP
#define CPUNIT_STRINGFLYWEIGHTSTORE_HPP

#include <string>
#include <memory>
#include <set>

namespace cpunit {

  class StringFlyweightStore {
    
    struct str_ptr_cmp {
      bool operator () (const std::string *p1, const std::string *p2) const;
    };

    typedef std::set<std::string*, str_ptr_cmp> str_ptr_set;

    StringFlyweightStore();
    ~StringFlyweightStore();

    static StringFlyweightStore *INSTANCE;

    str_ptr_set store;
    int users;
    bool disposed;

  public:

    static void dispose();
    static StringFlyweightStore& get_instance();

    const std::string* intern(const std::string &s);
    
    void add_user();
    void remove_user();
  };

  class StringFlyweightStoreUsage {
  public:
    StringFlyweightStoreUsage();
    StringFlyweightStoreUsage(const StringFlyweightStoreUsage&);
    virtual ~StringFlyweightStoreUsage();
    StringFlyweightStoreUsage& operator = (const StringFlyweightStoreUsage&);
  };
}

#endif // CPUNIT_STRINGFLYWEIGHTSTORE_HPP