text: //
  // Copyright (c) 2014-2015, THUNDERBEAST GAMES LLC All rights reserved
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in
  // all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  // THE SOFTWARE.
  //
  
  #include "../IO/Log.h"
  
  #include "IPCChannel.h"
  
  namespace Atomic
  {
  
  IPCChannel::IPCChannel(Context* context, unsigned id) : Object(context),
      id_(id)
  {
      ipc_ = GetSubsystem<IPC>();
      currentHeader_.messageType_ = IPC_MESSAGE_UNDEFINED;
  }
  
  IPCChannel::~IPCChannel()
  {
  
  }
  
  void IPCChannel::PostMessage(StringHash eventType, VariantMap &eventData)
  {
      IPCMessageEvent msgEvent;
      msgEvent.DoSend(transport_, id_, eventType, eventData);
  }
  
  bool IPCChannel::Receive()
  {
      size_t sz = 0;
      const char* data = transport_.Receive(&sz);
  
      if (!data)
      {
          // error
          return false;
      }
  
      if (!sz)
          return true;
  
      dataBuffer_.Seek(dataBuffer_.GetSize());
      dataBuffer_.Write(data, (unsigned) sz);
      dataBuffer_.Seek(0);
  
      while (true)
      {
          if (currentHeader_.messageType_ == IPC_MESSAGE_UNDEFINED &&
                  dataBuffer_.GetSize() - dataBuffer_.GetPosition() < sizeof(IPCMessageHeader))
          {
              return true;
          }
  
          if (currentHeader_.messageType_ == IPC_MESSAGE_UNDEFINED)
          {
              dataBuffer_.Read(&currentHeader_, sizeof(IPCMessageHeader));
          }
  
          if (currentHeader_.messageSize_ <= dataBuffer_.GetSize() - dataBuffer_.GetPosition())
          {
              MemoryBuffer buffer(dataBuffer_.GetData() + dataBuffer_.GetPosition(), currentHeader_.messageSize_);
              dataBuffer_.Seek( dataBuffer_.GetPosition() + currentHeader_.messageSize_);
              currentHeader_.messageType_ = IPC_MESSAGE_UNDEFINED;
  
              IPCMessageEvent event;
              StringHash eventType;
              VariantMap eventData;
              unsigned id;
              event.DoRead(buffer, id, eventType, eventData);
              ipc_->QueueEvent(id, eventType, eventData);
          }
  
          if (dataBuffer_.IsEof())
          {
              dataBuffer_.Clear();
          }
  
          if (dataBuffer_.GetPosition() == 0)
              break;
  
          VectorBuffer newBuffer;
          newBuffer.Write(dataBuffer_.GetData() + dataBuffer_.GetPosition(), dataBuffer_.GetSize() - dataBuffer_.GetPosition());
          newBuffer.Seek(0);
          dataBuffer_ = newBuffer;
      }
  
      return true;
  
  }
  
  
  }
  