C++ SharedArray::clear方法代码示例

         virtual const gnuradar::ResponseMessage Execute( gnuradar::ControlMessage& msg ){

            gnuradar::ResponseMessage response_msg;

            try{
               // reset any existing configuration
               producer_.reset();
               consumer_.reset();
               bufferManager_.reset();
               hdf5_.reset();
               array_.clear();

               gnuradar::File* file = msg.mutable_file();

               // standardizes units of input file.
               gr_helper::FormatFileFromMessage( file );

               gnuradar::RadarParameters* rp = file->mutable_radarparameters();

               // setup shared buffer header to assist in real-time processing 
               header_ = SharedBufferHeaderPtr
                  ( 
                   new ::yml::SharedBufferHeader
                   (
                    constants::NUM_BUFFERS,
                    rp->bytesperbuffer(),
                    file->samplerate(),
                    file->numchannels(),
                    rp->prisperbuffer(),
                    rp->samplesperbuffer()
                   )
                  );

               // setup gnuradar settings pointer
               GnuRadarSettingsPtr settings( new GnuRadarSettings() );

               // read and parse configuration file->
               GetSettings( settings, file );

               // create a device to communicate with hardware
               GnuRadarDevicePtr gnuRadarDevice( new GnuRadarDevice( settings ) );

               // make sure we don't have an existing data set
               if( gr_helper::HdfFileExists( file->basefilename() ))
               {
                  throw std::runtime_error( "HDF5 File set " + fileName + 
                        " exists and cannot be overwritten. Change your "
                        "base file set name and try again");
               }

               // setup HDF5 attributes and file->set.
               hdf5_ = SetupHDF5( file );

               // setup shared memory buffers
               CreateSharedBuffers( rp->bytesperbuffer() );

               // setup the buffer manager
               bufferManager_ = SynchronizedBufferManagerPtr( 
                     new SynchronizedBufferManager( 
                        array_, constants::NUM_BUFFERS, rp->bytesperbuffer()) );

               // setup table dimensions column = samples per ipp , row = IPP number
               std::vector<hsize_t> dims;
               dims.push_back(rp->prisperbuffer());
               dims.push_back (static_cast<int> (rp->samplesperpri()));

               // setup producer thread
               producer_ = gnuradar::ProducerThreadPtr (
                     new ProducerThread ( bufferManager_, gnuRadarDevice ) );

               // flush header information
               header_->Write(0,0,0);

               // setup consumer thread
               consumer_ = gnuradar::ConsumerThreadPtr(
                     new ConsumerThread ( bufferManager_ , header_, hdf5_, dims ) );

               // new model
               pcModel_->Initialize( bufferManager_, producer_, consumer_);

               // start producer thread
               pcModel_->Start();

               response_msg.set_value(gnuradar::ResponseMessage::OK);
               response_msg.set_message("Data collection successfully started.");

               // Start status thread to broadcast status packets to any subscribers.
               if( statusServer_->IsActive() == false )
               {
                  statusServer_->Start();
               }

               std::cout << "System is running..." << std::endl;

            }
            catch( std::runtime_error& e ){

               response_msg.set_value(gnuradar::ResponseMessage::ERROR);
               response_msg.set_message(e.what());

//.........这里部分代码省略.........

   virtual const std::string Execute( const xml::XmlPacketArgs& args ) {


      // reset any existing configuration
      producer_.reset();
      consumer_.reset();
      bufferManager_.reset();
      hdf5_.reset();
      array_.clear();

      std::string response;
      std::string xml_data = command::ParseArg( "file", args );

      // incoming "file" is self-contained xml data.
      bool data_is_xml = true;

      xml_data = xml::XmlPacket::DecodeXml( xml_data );

      // parse configuration file
      ConfigFile configFile( xml_data, data_is_xml );

      // create constants
      const int BUFFER_SIZE        = configFile.BytesPerSecond();
      const double SAMPLE_RATE     = configFile.SampleRate();
      const int NUM_CHANNELS       = configFile.NumChannels();
      const int IPPS_PER_BUFFER    = static_cast<int>( ceil(1.0/configFile.IPP()));
      const int SAMPLES_PER_BUFFER = static_cast<int> ( configFile.SamplesPerIpp() * configFile.NumChannels() );

      // setup shared buffer header to assist in real-time processing 
      header_ = SharedBufferHeaderPtr( new ::xml::SharedBufferHeader(
               constants::NUM_BUFFERS,
               BUFFER_SIZE,
               SAMPLE_RATE,
               NUM_CHANNELS,
               IPPS_PER_BUFFER,
               SAMPLES_PER_BUFFER
               ));

      // create a response packet and return to requester
      std::string destination = command::ParseArg( "source", args );
      xml::XmlPacketArgs responsePacket;
      responsePacket["destination"] = destination;
      responsePacket["type"] = "response";
      gnuradar::xml::XmlPacket packet("gnuradar_server");

      try{

         // make sure we don't have an existing data set
         CheckForExistingFileSet ( configFile.DataFileBaseName() ) ;

         // setup HDF5 attributes and file set.
         hdf5_ = SetupHDF5( configFile );

         // read and parse configuration file.
         GnuRadarSettingsPtr settings = GetSettings( configFile );

         // create a device to communicate with hardware
         GnuRadarDevicePtr gnuRadarDevice( new GnuRadarDevice( settings ) );

         // setup shared memory buffers
         CreateSharedBuffers( BUFFER_SIZE );

         // setup the buffer manager
         bufferManager_ = SynchronizedBufferManagerPtr( 
               new SynchronizedBufferManager( 
                  array_, constants::NUM_BUFFERS, BUFFER_SIZE) );

         // setup table dimensions column = samples per ipp , row = IPP number
         vector<hsize_t> dims;
         dims.push_back( IPPS_PER_BUFFER );
         dims.push_back ( 
               static_cast<int> ( 
                  configFile.SamplesPerIpp() * configFile.NumChannels() ) 
               );

         // setup producer thread
         producer_ = gnuradar::ProducerThreadPtr (
               new ProducerThread ( bufferManager_, gnuRadarDevice ) );

         // flush header information
         header_->Close();

         // setup consumer thread
         consumer_ = gnuradar::ConsumerThreadPtr(
               new ConsumerThread ( bufferManager_ , header_, hdf5_, dims ) );

         // new model
         pcModel_->Initialize( bufferManager_, producer_, consumer_);

         // start producer thread
         pcModel_->Start();

         responsePacket["value"] = "OK";
         responsePacket["message"] = "Data collection successfully started.";
         response = packet.Format( responsePacket );

         // Start status thread to broadcast status packets to any subscribers.
         statusThread_->Stop();
         statusThread_->Start();

//.........这里部分代码省略.........