unique_string_manager.h

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/*
 * Copyright (c) 2011, Willow Garage, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
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 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of the Willow Garage, Inc. 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"
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#ifndef UNIQUE_STRING_MANAGER_H_
#define UNIQUE_STRING_MANAGER_H_

#include <boost/thread/mutex.hpp>

namespace rviz_interaction_tools
{

inline int getNextInt()
{
  static int val = 0;
  static boost::mutex mtx;

  boost::mutex::scoped_lock lock ( mtx );
  return val++;
}

// on construction, acquires a unique id number
// can be used to generate unique strings
class UniqueStringManager
{
private:
  int val_;
public:
  UniqueStringManager()
  {
    val_ = getNextInt();
  }
  std::string unique(std::string base)
  {
    std::stringstream ss;
    ss << base << "_" << val_;
    return ss.str();
  }
};

}

#endif /* UNIQUE_STRING_MANAGER_H_ */