C++ iterator::read方法代码示例

本文整理汇总了C++中typename_istreamlist::iterator::read方法的典型用法代码示例。如果您正苦于以下问题：C++ iterator::read方法的具体用法？C++ iterator::read怎么用？C++ iterator::read使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类typename_istreamlist::iterator的用法示例。

在下文中一共展示了iterator::read方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: lock

template <  typename IN_PORT_TYPE, typename OUT_PORT_TYPE > int randomizer_base::_transformerServiceFunction( typename  std::vector< gr_istream< IN_PORT_TYPE > > &istreams ,
    typename  std::vector< gr_ostream< OUT_PORT_TYPE > > &ostreams  )
{
    typedef typename std::vector< gr_istream< IN_PORT_TYPE > >   _IStreamList;
    typedef typename std::vector< gr_ostream< OUT_PORT_TYPE > >  _OStreamList;

    boost::mutex::scoped_lock lock(serviceThreadLock);

    if ( validGRBlock() == false ) {

        // create our processing block, and setup  property notifiers
        createBlock();

        LOG_DEBUG( randomizer_base, " FINISHED BUILDING  GNU RADIO BLOCK");
    }
 
    //process any Stream ID changes this could affect number of io streams
    processStreamIdChanges();

    if ( !validGRBlock() || istreams.size() == 0 || ostreams.size() == 0  ) {
        LOG_WARN( randomizer_base, "NO STREAMS ATTACHED TO BLOCK..." );
        return NOOP;
    }

    _input_ready.resize( istreams.size() );
    _ninput_items_required.resize( istreams.size() );
    _ninput_items.resize( istreams.size() );
    _input_items.resize( istreams.size() );
    _output_items.resize( ostreams.size() );

    //
    // RESOLVE: need to look at forecast strategy, 
    //    1)  see how many read items are necessary for N number of outputs
    //    2)  read input data and see how much output we can produce
    //

    //
    // Grab available data from input streams
    //
    typename _OStreamList::iterator ostream;
    typename _IStreamList::iterator istream = istreams.begin();
    int nitems=0;
    for ( int idx=0 ; istream != istreams.end() && serviceThread->threadRunning() ; idx++, istream++ ) {
        // note this a blocking read that can cause deadlocks
        nitems = istream->read();
    
        if ( istream->overrun() ) {
            LOG_WARN( randomizer_base, " NOT KEEPING UP WITH STREAM ID:" << istream->streamID );
        }

        if ( istream->sriChanged() ) {
            // RESOLVE - need to look at how SRI changes can affect Gnu Radio BLOCK state
            LOG_DEBUG( randomizer_base, "SRI CHANGED, STREAMD IDX/ID: " 
                      << idx << "/" << istream->pkt->streamID );
            setOutputStreamSRI( idx, istream->pkt->SRI );
        }
    }

    LOG_TRACE( randomizer_base, "READ NITEMS: "  << nitems );
    if ( nitems <= 0 && !_istreams[0].eos() ) {
        return NOOP;
    }

    bool eos = false;
    int  nout = 0;
    bool workDone = false;

    while ( nout > -1 && serviceThread->threadRunning() ) {
        eos = false;
        nout = _forecastAndProcess( eos, istreams, ostreams );
        if ( nout > -1  ) {
            workDone = true;

            // we chunked on data so move read pointer..
            istream = istreams.begin();
            for ( ; istream != istreams.end(); istream++ ) {
                int idx=std::distance( istreams.begin(), istream );
                // if we processed data for this stream
                if ( _input_ready[idx] ) {
                    size_t nitems = 0;
                    try {
                        nitems = gr_sptr->nitems_read( idx );
                    } catch(...){}
      
                    if ( nitems > istream->nitems() ) {
                        LOG_WARN( randomizer_base,  "WORK CONSUMED MORE DATA THAN AVAILABLE,  READ/AVAILABLE "
                                 << nitems << "/" << istream->nitems() );
                        nitems = istream->nitems();
                    }
                    istream->consume( nitems );
                    LOG_TRACE( randomizer_base, " CONSUME READ DATA  ITEMS/REMAIN " << nitems << "/" << istream->nitems());
                }
            }
            gr_sptr->reset_read_index();
        }

        // check for not enough data return
        if ( nout == -1 ) {

            // check for  end of stream
//.........这里部分代码省略.........

开发者ID:RedhawkSDR，项目名称:integration-gnuhawk，代码行数:101，代码来源:randomizer_base.cpp

示例2: lock

template < typename IN_PORT_TYPE > int vector_sink_s_base::_analyzerServiceFunction( typename  std::vector< gr_istream< IN_PORT_TYPE > > &istreams ) {

  typedef typename std::vector< gr_istream< IN_PORT_TYPE > > _IStreamList;

  boost::mutex::scoped_lock lock(serviceThreadLock);

  if ( validGRBlock() == false ) {
    
    // create our processing block
    createBlock();

    LOG_DEBUG(  vector_sink_s_base, " FINISHED BUILDING  GNU RADIO BLOCK");
  }
   
  // process any Stream ID changes this could affect number of io streams
  processStreamIdChanges();
    
  if ( !validGRBlock() || istreams.size() == 0 ) {
    LOG_WARN(vector_sink_s_base, "NO STREAMS ATTACHED TO BLOCK..." );
    return NOOP;
  }

  // resize data vectors for passing data to GR_BLOCK object
  _input_ready.resize( istreams.size() );
  _ninput_items_required.resize( istreams.size());
  _ninput_items.resize( istreams.size());
  _input_items.resize(istreams.size());
  _output_items.resize(0);
  
  //
  // RESOLVE: need to look at forecast strategy, 
  //    1)  see how many read items are necessary for N number of outputs
  //    2)  read input data and see how much output we can produce
  //
  
  //
  // Grab available data from input streams
  //
  typename _IStreamList::iterator istream = istreams.begin();
  int nitems=0;
  for ( int idx=0 ; istream != istreams.end() && serviceThread->threadRunning() ; idx++, istream++ ) {
    // note this a blocking read that can cause deadlocks
    nitems = istream->read();
    
    if ( istream->overrun() ) {
        LOG_WARN( vector_sink_s_base, " NOT KEEPING UP WITH STREAM ID:" << istream->streamID );
    }
    
    // RESOLVE issue when SRI changes that could affect the GNU Radio BLOCK
    if ( istream->sriChanged() ) {
      LOG_DEBUG( vector_sink_s_base, "SRI CHANGED, STREAMD IDX/ID: " 
               << idx << "/" << istream->pkt->streamID );
    }
  }

  LOG_TRACE( vector_sink_s_base, "READ NITEMS: "  << nitems );
  if ( nitems <= 0 && !_istreams[0].eos() ) return NOOP;

  bool exitServiceFunction = false;
  bool eos = false;
  int  nout = 0;
  while ( nout > -1 && !exitServiceFunction && serviceThread->threadRunning() ) {

    eos = false;
    nout = _forecastAndProcess( eos, istreams );
    if ( nout > -1  ) {
      // we chunked on data so move read pointer..
      istream = istreams.begin();
      for ( ; istream != istreams.end(); istream++ ) {

	int idx=std::distance( istreams.begin(), istream );
	// if we processed data for this stream
	if ( _input_ready[idx] ) {
	  size_t nitems = 0;
	  try {
	    nitems = gr_sptr->nitems_read( idx );
	  }
	  catch(...){}
      
	  if ( nitems > istream->nitems() ) {
	       LOG_WARN( vector_sink_s_base,  "WORK CONSUMED MORE DATA THAN AVAILABLE,  READ/AVAILABLE " << nitems << "/" << istream->nitems() );
               nitems = istream->nitems();
	  }
	  istream->consume( nitems );
          LOG_TRACE( vector_sink_s_base, " CONSUME READ DATA  ITEMS/REMAIN " << nitems << "/" << istream->nitems());
	}

      }
      gr_sptr->reset_read_index();
    }

    // check for not enough data return
    if ( nout == -1 ) {

      // check for  end of stream
      istream = istreams.begin();
      for ( ; istream != istreams.end() ; istream++) if ( istream->eos() ) eos=true;

      if ( eos ) {
        LOG_TRACE( vector_sink_s_base, " DATA NOT READY, EOS:" << eos );
//.........这里部分代码省略.........

开发者ID:VenturaSolutionsInc，项目名称:integration-gnuhawk，代码行数:101，代码来源:vector_sink_s_base.cpp

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