modules/core/include/dpl/read_write_mutex.h

   1 /*
   2  * Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
   3  *
   4  *    Licensed under the Apache License, Version 2.0 (the "License");
   5  *    you may not use this file except in compliance with the License.
   6  *    You may obtain a copy of the License at
   7  *
   8  *        http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  *    Unless required by applicable law or agreed to in writing, software
  11  *    distributed under the License is distributed on an "AS IS" BASIS,
  12  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  *    See the License for the specific language governing permissions and
  14  *    limitations under the License.
  15  */
  16 /*
  17  * @file        read_write_mutex.h
  18  * @author      Przemyslaw Dobrowolski (p.dobrowolsk@samsung.com)
  19  * @version     1.0
  20  * @brief       This file is the implementation file of read write mutex
  21  */
  22 #ifndef DPL_READ_WRITE_MUTEX_H
  23 #define DPL_READ_WRITE_MUTEX_H
  24
  25 #include <dpl/noncopyable.h>
  26 #include <dpl/exception.h>
  27 #include <pthread.h>
  28
  29 namespace DPL
  30 {
  31 class ReadWriteMutex
  32     : private Noncopyable
  33 {
  34 public:
  35     class ScopedReadLock
  36         : private Noncopyable
  37     {
  38     private:
  39         ReadWriteMutex *m_mutex;
  40
  41     public:
  42         ScopedReadLock(ReadWriteMutex *mutex);
  43         virtual ~ScopedReadLock();
  44     };
  45
  46     class ScopedWriteLock
  47         : private Noncopyable
  48     {
  49     private:
  50         ReadWriteMutex *m_mutex;
  51
  52     public:
  53         ScopedWriteLock(ReadWriteMutex *mutex);
  54         virtual ~ScopedWriteLock();
  55     };
  56
  57     class Exception
  58     {
  59     public:
  60         DECLARE_EXCEPTION_TYPE(DPL::Exception, Base)
  61         DECLARE_EXCEPTION_TYPE(Base, CreateFailed)
  62         DECLARE_EXCEPTION_TYPE(Base, DestroyFailed)
  63         DECLARE_EXCEPTION_TYPE(Base, ReadLockFailed)
  64         DECLARE_EXCEPTION_TYPE(Base, WriteLockFailed)
  65         DECLARE_EXCEPTION_TYPE(Base, UnlockFailed)
  66     };
  67
  68 private:
  69     mutable pthread_rwlock_t m_rwlock;
  70
  71     void ReadLock() const;
  72     void WriteLock() const;
  73     void Unlock() const;
  74
  75 public:
  76     explicit ReadWriteMutex();
  77     virtual ~ReadWriteMutex();
  78 };
  79
  80 } // namespace DPL
  81
  82 #endif // DPL_READ_WRITE_MUTEX_H