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 context support
  21  */
  22 #ifndef DPL_WAITABLE_INPUT_OUTPUT_EXECUTION_CONTEXT_SUPPORT_H
  23 #define DPL_WAITABLE_INPUT_OUTPUT_EXECUTION_CONTEXT_SUPPORT_H
  24
  25 #include <dpl/abstract_waitable_input_output.h>
  26 #include <dpl/waitable_handle_watch_support.h>
  27 #include <dpl/binary_queue.h>
  28
  29 namespace DPL
  30 {
  31 namespace Socket
  32 {
  33
  34 class WaitableInputOutputExecutionContextSupport
  35     : private WaitableHandleWatchSupport::WaitableHandleListener
  36 {
  37 public:
  38     class Exception
  39     {
  40     public:
  41         DECLARE_EXCEPTION_TYPE(DPL::Exception, Base)
  42         DECLARE_EXCEPTION_TYPE(Base, AlreadyOpened)
  43         DECLARE_EXCEPTION_TYPE(Base, NotOpened)
  44         DECLARE_EXCEPTION_TYPE(Base, OpenFailed)
  45         DECLARE_EXCEPTION_TYPE(Base, CloseFailed)
  46     };
  47
  48 private:
  49     bool m_opened;
  50     AbstractWaitableInputOutput *m_waitableInputOutput;
  51
  52     // Watch state
  53     bool m_hasReadWatch;
  54     bool m_hasWriteWatch;
  55
  56     void AddReadWatch();
  57     void RemoveReadWatch();
  58     void AddWriteWatch();
  59     void RemoveWriteWatch();
  60
  61     void ReadInput();
  62
  63     void CheckedRemoveReadWatch();
  64     void CheckedRemoveWriteWatch();
  65
  66     void CheckedRemoveReadWriteWatch();
  67
  68     virtual void OnWaitableHandleEvent(WaitableHandle waitableHandle, WaitMode::Type mode);
  69
  70 protected:
  71     // Incoming/Outgoing streams
  72     BinaryQueue m_inputStream;
  73     BinaryQueue m_outputStream;
  74
  75     // Support calbback methods
  76     virtual void OnInputStreamRead() = 0;
  77     virtual void OnInputStreamClosed() = 0;
  78     virtual void OnInputStreamBroken() = 0;
  79
  80     // Trigger feeding output - after updating output stream
  81     void FeedOutput();
  82
  83     // Open/Close destination waitable input-output
  84     void Open(AbstractWaitableInputOutput *waitableInputOutput);
  85     void Close();
  86
  87 public:
  88     /**
  89      * Constructor
  90      */
  91     explicit WaitableInputOutputExecutionContextSupport();
  92
  93     /**
  94      * Destructor
  95      */
  96     virtual ~WaitableInputOutputExecutionContextSupport();
  97 };
  98
  99 }
 100 } // namespace DPL
 101
 102 #endif // DPL_WAITABLE_INPUT_OUTPUT_EXECUTION_CONTEXT_SUPPORT_H