Orocos Real-Time Toolkit  2.9.0
MQSerializationProtocol.hpp
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1 /***************************************************************************
2  tag: Peter Soetens Thu Oct 22 11:59:07 CEST 2009 MQSerializationProtocol.hpp
3 
4  MQSerializationProtocol.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 /*
40  * MqueueSerializationProtocol.hpp
41  *
42  * Created on: Sep 21, 2009
43  * Author: kaltan
44  */
45 
46 #ifndef MQSERIALIZATIONPROTOCOL_HPP_
47 #define MQSERIALIZATIONPROTOCOL_HPP_
48 
50 #include "binary_data_archive.hpp"
51 #include <boost/iostreams/stream.hpp>
52 #include <boost/iostreams/device/array.hpp>
53 #include <iostream>
54 namespace RTT
55 {
56 
57  namespace mqueue
58  {
59 
60  template<class T>
63  {
64  public:
66  }
67 
68  virtual std::pair<void const*,int> fillBlob( base::DataSourceBase::shared_ptr source, void* blob, int size, void* cookie) const
69  {
70  namespace io = boost::iostreams;
71  typename internal::DataSource<T>::shared_ptr d = boost::dynamic_pointer_cast< internal::DataSource<T> >( source );
72  if ( d ) {
73  // we use the boost iostreams library for re-using the blob buffer in the stream object.
74  // and the serialization library to write the data into stream.
75  io::stream<io::array_sink> outbuf( (char*)blob, size);
76  binary_data_oarchive out( outbuf );
77  out << d->rvalue();
78  return std::make_pair( blob, out.getArchiveSize() );
79  }
80  return std::make_pair((void*)0,int(0));
81  }
82 
86  virtual bool updateFromBlob(const void* blob, int size, base::DataSourceBase::shared_ptr target, void* cookie) const {
87  namespace io = boost::iostreams;
89  if ( ad ) {
90  io::stream<io::array_source> inbuf((const char*)blob, size);
91  binary_data_iarchive in( inbuf );
92  in >> ad->set();
93  return true;
94  }
95  return false;
96  }
97 
98  virtual unsigned int getSampleSize(base::DataSourceBase::shared_ptr sample, void* cookie) const {
99  typename internal::DataSource<T>::shared_ptr tsample = boost::dynamic_pointer_cast< internal::DataSource<T> >( sample );
100  if ( ! tsample ) {
101  log(Error) << "getSampleSize: sample has wrong type."<<endlog();
102  return 0;
103  }
104  namespace io = boost::iostreams;
105  char sink[1];
106  io::stream<io::array_sink> outbuf(sink,1);
107  binary_data_oarchive out( outbuf, false );
108  out << tsample->get();
109  //std::cout << "sample size is "<< tsample->rvalue().size() <<" archive is " << out.getArchiveSize() <<std::endl; //disable all types but std::vector<double> for this to compile
110  return out.getArchiveSize();
111  }
112  };
113 
114  }
115 
116 }
117 
118 #endif /* MQSERIALIZATIONPROTOCOL_HPP_ */
DataSource is a base class representing a generic way to read data of type T.
Definition: DataSource.hpp:94
This archive is capable of saving objects of serialization level 1 and 2 in a binary, non-portable format.
virtual result_t get() const =0
Return the data as type T.
This file implements a &#39;level 2&#39; binary archiver of serializable objects.
For each transportable type T, specify the conversion functions.
virtual void set(param_t t)=0
Set this DataSource with a value.
This archive is capable of loading objects of serialization level 1 and 2 from a binary, non-portable format.
virtual bool updateFromBlob(const void *blob, int size, base::DataSourceBase::shared_ptr target, void *cookie) const
Update target with the contents of blob which is an object of a protocol.
virtual const_reference_t rvalue() const =0
Get a const reference to the value of this DataSource.
virtual unsigned int getSampleSize(base::DataSourceBase::shared_ptr sample, void *cookie) const
Returns the size in bytes of a marshalled data element.
int getArchiveSize()
Helper method to say how much we wrote.
boost::intrusive_ptr< DataSource< T > > shared_ptr
Definition: DataSource.hpp:115
boost::intrusive_ptr< AssignableDataSource< T > > shared_ptr
Use this type to store a pointer to an AssignableDataSource.
Definition: DataSource.hpp:198
static AssignableDataSource< T > * narrow(base::DataSourceBase *db)
This method narrows a base::DataSourceBase to a typeded AssignableDataSource, possibly returning a ne...
Definition: DataSource.inl:72
boost::intrusive_ptr< DataSourceBase > shared_ptr
Use this type to store a pointer to a DataSourceBase.
Contains TaskContext, Activity, OperationCaller, Operation, Property, InputPort, OutputPort, Attribute.
Definition: Activity.cpp:52
virtual std::pair< void const *, int > fillBlob(base::DataSourceBase::shared_ptr source, void *blob, int size, void *cookie) const
Create an transportable object for a protocol which contains the value of source. ...