Orocos Real-Time Toolkit  2.9.0
MQTemplateProtocolBase.hpp
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1 /***************************************************************************
2  tag: Peter Soetens Thu Oct 22 11:59:07 CEST 2009 MQTemplateProtocol.hpp
3 
4  MQTemplateProtocol.hpp - description
5  -------------------
6  begin : Thu October 22 2009
7  copyright : (C) 2009 Peter Soetens
8  email : peter@thesourcworks.com
9 
10  ***************************************************************************
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37 
38 
39 #ifndef ORO_MQ_TEMPATE_PROTOCOL_BASE_HPP
40 #define ORO_MQ_TEMPATE_PROTOCOL_BASE_HPP
41 
42 #include "MQLib.hpp"
43 #include "../../types/TypeMarshaller.hpp"
44 #include "MQChannelElement.hpp"
45 
46 #include <boost/type_traits/has_virtual_destructor.hpp>
47 #include <boost/static_assert.hpp>
48 
49 namespace RTT
50 { namespace mqueue
51  {
59  template<class T>
62  {
63  public:
67  typedef T UserType;
68 
69  virtual base::ChannelElementBase::shared_ptr createStream(base::PortInterface* port, const ConnPolicy& policy, bool is_sender) const {
70  try {
71  base::ChannelElementBase::shared_ptr mq = new MQChannelElement<T>(port, *this, policy, is_sender);
72  if ( !is_sender && (policy.pull == ConnPolicy::PULL) ) {
73  // the receiver needs a buffer to store his messages in. For pull connections buildChannelOutput does not add an output buffer, so we add it here:
75  mq->connectTo(buf);
76  }
77  return mq;
78  } catch(std::exception& e) {
79  log(Error) << "Failed to create MQueue Channel element: " << e.what() << endlog();
80  }
82  }
83 
84  };
85 }
86 }
87 
88 #endif
For each transportable type T, specify the conversion functions.
static const bool PULL
Definition: ConnPolicy.hpp:120
base::ChannelElementBase::shared_ptr buildDataStorage(ConnPolicy const &policy) const
Creates single data or buffered storage for this type.
Definition: TypeInfo.cpp:207
Implements the a ChannelElement using message queues.
A connection policy object describes how a given connection should behave.
Definition: ConnPolicy.hpp:107
Objects implementing this interface have the capability to convert data sources to and from a binary ...
static const types::TypeInfo * getTypeInfo()
Return the typeinfo object.
T UserType
The given T parameter is the type for reading DataSources.
boost::intrusive_ptr< ChannelElementBase > shared_ptr
Contains TaskContext, Activity, OperationCaller, Operation, Property, InputPort, OutputPort, Attribute.
Definition: Activity.cpp:52
The base class of every data flow port.
virtual base::ChannelElementBase::shared_ptr createStream(base::PortInterface *port, const ConnPolicy &policy, bool is_sender) const
Creates a streaming channel element for reading or writing over this transport.