MutexLock.hpp

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/***************************************************************************
  tag: Peter Soetens  Thu Oct 10 16:16:57 CEST 2002  MutexLock.hpp

                        MutexLock.hpp -  description
                           -------------------
    begin                : Thu October 10 2002
    copyright            : (C) 2002 Peter Soetens
    email                : peter.soetens@mech.kuleuven.ac.be

 ***************************************************************************
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU General Public                   *
 *   License as published by the Free Software Foundation;                 *
 *   version 2 of the License.                                             *
 *                                                                         *
 *   As a special exception, you may use this file as part of a free       *
 *   software library without restriction.  Specifically, if other files   *
 *   instantiate templates or use macros or inline functions from this     *
 *   file, or you compile this file and link it with other files to        *
 *   produce an executable, this file does not by itself cause the         *
 *   resulting executable to be covered by the GNU General Public          *
 *   License.  This exception does not however invalidate any other        *
 *   reasons why the executable file might be covered by the GNU General   *
 *   Public License.                                                       *
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 *   This library is distributed in the hope that it will be useful,       *
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
 *   Lesser General Public License for more details.                       *
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 ***************************************************************************/

#ifndef OS_MUTEXLOCK_HPP
#define OS_MUTEXLOCK_HPP

#include "fosi.h"

#include "Mutex.hpp"

namespace RTT
{ namespace os {
    class RTT_API MutexLock
    {

        public:
            MutexLock( MutexInterface &mutex )
            {
                _mutex = &mutex;
                _mutex->lock ();
            }

            ~MutexLock()
            {
                _mutex->unlock();
            }

        protected:
            MutexInterface *_mutex;

            MutexLock()
            {}

    };

    class RTT_API MutexTryLock
    {

        public:

            MutexTryLock( MutexInterface &mutex )
                    : _mutex( &mutex), successful( mutex.trylock() )
            {
            }

            bool isSuccessful()
            {
                return successful;
            }

            ~MutexTryLock()
            {
                if ( successful )
                    _mutex->unlock();
            }

        protected:
            MutexInterface *_mutex;

            MutexTryLock()
            {}

        private:

            bool successful;

    };

     class RTT_API MutexTimedLock
     {

         public:

             MutexTimedLock( MutexInterface &mutex, Seconds timeout )
                     : _mutex( &mutex), successful( mutex.timedlock(timeout) )
             {
             }

             bool isSuccessful()
             {
                 return successful;
             }

             ~MutexTimedLock()
             {
                 if ( successful )
                     _mutex->unlock();
             }

         protected:
             MutexInterface *_mutex;

             MutexTimedLock()
             {}

         private:

             bool successful;

     };

     class RTT_API SharedMutexLock
     {

         public:
             SharedMutexLock( MutexInterface &mutex )
             {
                 _mutex = &mutex;
                 _mutex->lock_shared ();
             }

             ~SharedMutexLock()
             {
                 _mutex->unlock_shared();
             }

         protected:
             MutexInterface *_mutex;

             SharedMutexLock()
             {}
     };
}}

#endif