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destruction_guard.h

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/*********************************************************************
*
* Software License Agreement (BSD License)
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*  Copyright (c) 2009, Willow Garage, Inc.
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*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* Author: Eitan Marder-Eppstein
*********************************************************************/
#ifndef ACTIONLIB_DESTRUCTION_GUARD_
#define ACTIONLIB_DESTRUCTION_GUARD_

#include <boost/thread/condition.hpp>
#include <boost/thread/mutex.hpp>

namespace actionlib {
  class DestructionGuard {
    public:
      DestructionGuard() : use_count_(0), destructing_(false){}
      void destruct(){
        boost::mutex::scoped_lock lock(mutex_);
        destructing_ = true;
        while(use_count_ > 0){
          count_condition_.timed_wait(lock, boost::posix_time::milliseconds(1000.0f)); 
        }
      }

      bool tryProtect(){
        boost::mutex::scoped_lock lock(mutex_);
        if(destructing_)
          return false;
        use_count_++;
        return true;
      }

      void unprotect(){
        boost::mutex::scoped_lock lock(mutex_);
        use_count_--;
      }

      class ScopedProtector
      {
        public:
          ScopedProtector(DestructionGuard& guard) : guard_(guard), protected_(false){
            protected_ = guard_.tryProtect();
          }

          bool isProtected(){
            return protected_;
          }

          ~ScopedProtector(){
            if(protected_)
              guard_.unprotect();
          }

        private:
          DestructionGuard& guard_;
          bool protected_;
      };


    private:
      boost::mutex mutex_;
      int use_count_;
      bool destructing_;
      boost::condition count_condition_;
  };

};
#endif

---

actionlib
Author(s): Eitan Marder-Eppstein, Vijay Pradeep
autogenerated on Fri Mar 1 14:59:36 2013