modules/socket/include/dpl/socket/waitable_input_output_execution_context_support.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        waitable_input_output_execution_context_support.h
  18  * @author      Przemyslaw Dobrowolski (p.dobrowolsk@samsung.com)
  19  * @version     1.0
  20  * @brief       This file is the header file for waitable input-output execution
  21  * context support
  22  */
  23 #ifndef DPL_WAITABLE_INPUT_OUTPUT_EXECUTION_CONTEXT_SUPPORT_H
  24 #define DPL_WAITABLE_INPUT_OUTPUT_EXECUTION_CONTEXT_SUPPORT_H
  25
  26 #include <dpl/abstract_waitable_input_output.h>
  27 #include <dpl/waitable_handle_watch_support.h>
  28 #include <dpl/binary_queue.h>
  29
  30 namespace DPL {
  31 namespace Socket {
  32 class WaitableInputOutputExecutionContextSupport :
  33     private WaitableHandleWatchSupport::WaitableHandleListener
  34 {
  35   public:
  36     class Exception
  37     {
  38       public:
  39         DECLARE_EXCEPTION_TYPE(DPL::Exception, Base)
  40         DECLARE_EXCEPTION_TYPE(Base, AlreadyOpened)
  41         DECLARE_EXCEPTION_TYPE(Base, NotOpened)
  42         DECLARE_EXCEPTION_TYPE(Base, OpenFailed)
  43         DECLARE_EXCEPTION_TYPE(Base, CloseFailed)
  44     };
  45
  46   private:
  47     bool m_opened;
  48     AbstractWaitableInputOutput *m_waitableInputOutput;
  49
  50     // Watch state
  51     bool m_hasReadWatch;
  52     bool m_hasWriteWatch;
  53
  54     void AddReadWatch();
  55     void RemoveReadWatch();
  56     void AddWriteWatch();
  57     void RemoveWriteWatch();
  58
  59     void ReadInput();
  60
  61     void CheckedRemoveReadWatch();
  62     void CheckedRemoveWriteWatch();
  63
  64     void CheckedRemoveReadWriteWatch();
  65
  66     virtual void OnWaitableHandleEvent(WaitableHandle waitableHandle,
  67                                        WaitMode::Type mode);
  68
  69   protected:
  70     // Incoming/Outgoing streams
  71     BinaryQueue m_inputStream;
  72     BinaryQueue m_outputStream;
  73
  74     // Support calbback methods
  75     virtual void OnInputStreamRead() = 0;
  76     virtual void OnInputStreamClosed() = 0;
  77     virtual void OnInputStreamBroken() = 0;
  78
  79     // Trigger feeding output - after updating output stream
  80     void FeedOutput();
  81
  82     // Open/Close destination waitable input-output
  83     void Open(AbstractWaitableInputOutput *waitableInputOutput);
  84     void Close();
  85
  86   public:
  87     /**
  88      * Constructor
  89      */
  90     explicit WaitableInputOutputExecutionContextSupport();
  91
  92     /**
  93      * Destructor
  94      */
  95     virtual ~WaitableInputOutputExecutionContextSupport();
  96 };
  97 }
  98 } // namespace DPL
  99
 100 #endif // DPL_WAITABLE_INPUT_OUTPUT_EXECUTION_CONTEXT_SUPPORT_H