text: /**
   * Copyright 2017 Shusheng Shao <iblackangel@163.com>
   * 
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * 
   * http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  #ifndef _MLOCKFILE_H_
  #define _MLOCKFILE_H_
  
  #include <mpl/mcoredef.h>
  
  MPL_BEGIN_NAMESPACE
  
  class MLockFile
  {
  public:
      explicit MLockFile();
  	MLockFile(const char *s);
  	MLockFile(const std::string &str);
  	MLockFile(const MLockFile &other);
      virtual ~MLockFile();
  
  	int lock();
  	void unlock();
  
  	MLockFile &operator=(const MLockFile &other);
  	MLockFile &operator=(const char *s);
  	MLockFile &operator=(const std::string &str);
  
  	bool operator==(const MLockFile &f) const;
  	bool operator!=(const MLockFile &f) const
  		{ return !operator==(f); }
  private:
  	inline void inner_copy(const MLockFile &o) {
  		_fname = o._fname;
  		_fd = o._fd;
  	}
  	std::string _fname;
  	int _fd;
  };
  
  MPL_END_NAMESPACE
  
  #endif /* _MLOCKFILE_H_ */
  