JNET::JSelect Class Reference

Wrapper class for select call. More...

#include <JSelect.hh>

Inheritance diagram for JNET::JSelect:

Public Member Functions
	JSelect ()
	Default constructor.
void	reset ()
	Reset.
bool	operator() ()
	Infinite wait select call.
bool	operator() (JTimeval timeout)
	Select call.
int	operator() (JTimeval *timeout)
	Select call.
JFileDescriptorMask &	getReaderMask ()
	Get reader mask.
void	setReaderMask (const JAbstractFile &file)
	Set reader mask.
bool	hasReaderMask (const JAbstractFile &file) const
	Has reader file.
int	operator() (timeval *timeout=NULL)
	Select call.
JFileDescriptorMask &	getWriterMask ()
	Get writer mask.
void	setWriterMask (const JAbstractFile &file)
	Set writer mask.
bool	hasWriterMask (const JAbstractFile &file) const
	Has writer file.
int	operator() (timeval *timeout=NULL)
	Select call.

Protected Attributes
JFileDescriptorMask	readerMask
JFileDescriptorMask	writerMask

Detailed Description

Wrapper class for select call.

Definition at line 34 of file JSelect.hh.

Constructor & Destructor Documentation

JSelect()

JNET::JSelect::JSelect ( )

inline

Default constructor.

Definition at line 42 of file JSelect.hh.

              :
      JSelectReader(),
      JSelectWriter()
    {}

Member Function Documentation

reset()

void JNET::JSelect::reset ( )

inline

Reset.

Definition at line 51 of file JSelect.hh.

    {
      static_cast<JSelectReader&>(*this).reset();
      static_cast<JSelectWriter&>(*this).reset();
    }

operator()() [1/5]

bool JNET::JSelect::operator() ( )

inline

Infinite wait select call.

Returns

true if data can be read or written; else false

Definition at line 64 of file JSelect.hh.

    {
      return this->operator ()(0);
    }

operator()() [2/5]

bool JNET::JSelect::operator() ( JTimeval timeout )

inline

Select call.

Parameters

timeout

timeout

Returns

true if data can be read or written; else false

Definition at line 76 of file JSelect.hh.

    {
      return this->operator ()(static_cast<JTimeval*>(static_cast<void*>(&timeout)));
    }

operator()() [3/5]

int JNET::JSelect::operator() ( JTimeval * timeout )

inline

Select call.

Returns

number of valid file descriptors

Definition at line 87 of file JSelect.hh.

    {
      int nfds = std::max(readerMask.getNumberOfFileDescriptors(),
                          writerMask.getNumberOfFileDescriptors());
 
      nfds += 1;
      nfds  = ::select(nfds, &readerMask, &writerMask, NULL, timeout->get());
 
      if (nfds != 0) {
 
        if (nfds < 0) {
 
          readerMask.reset(true);   // hard reset
          writerMask.reset(true);   // hard reset
 
          if (errno != EINTR) {
            THROW(JSelectException, "select(..) failed " << nfds << "; errno = " << errno);
          }
        }
 
      } else {
 
        readerMask.reset(false);    // soft reset
        writerMask.reset(false);    // soft reset
      }
 
      return nfds;
    }

getReaderMask()

JFileDescriptorMask & JNET::JSelectReader::getReaderMask ( )

inlineinherited

Get reader mask.

Returns

mask

Definition at line 46 of file JSelectReader.hh.

    {
      return readerMask;
    }

setReaderMask()

void JNET::JSelectReader::setReaderMask ( const JAbstractFile & file )

inlineinherited

Set reader mask.

Parameters

file

file

Definition at line 57 of file JSelectReader.hh.

    {
      readerMask.set(file);
    }

hasReaderMask()

bool JNET::JSelectReader::hasReaderMask ( const JAbstractFile & file ) const

inlineinherited

Has reader file.

Parameters

file

file

Returns

true if file set; else false

Definition at line 69 of file JSelectReader.hh.

    {
      return readerMask.has(file);
    }

operator()() [4/5]

int JNET::JSelectReader::operator() ( timeval * timeout = NULL )

inlineinherited

Select call.

Parameters

timeout

timeout

Returns

number of valid file descriptors

Definition at line 102 of file JSelectReader.hh.

    {
      int nfds = readerMask.getNumberOfFileDescriptors();
 
      nfds += 1;
      nfds  = ::select(nfds, &readerMask, NULL, NULL, timeout);
 
      if (nfds != 0) {
 
        if (nfds < 0) {
          if (errno != EINTR) {
            THROW(JSelectException, "JSelectReader(..) failed.");
          }
        }
 
      } else {
 
        readerMask.reset(false);    // soft reset
      }
 
      return nfds;
    }

getWriterMask()

JFileDescriptorMask & JNET::JSelectWriter::getWriterMask ( )

inlineinherited

Get writer mask.

Returns

mask

Definition at line 46 of file JSelectWriter.hh.

    {
      return writerMask;
    }

setWriterMask()

void JNET::JSelectWriter::setWriterMask ( const JAbstractFile & file )

inlineinherited

Set writer mask.

Parameters

file

file

Definition at line 57 of file JSelectWriter.hh.

    {
      writerMask.set(file);
    }

hasWriterMask()

bool JNET::JSelectWriter::hasWriterMask ( const JAbstractFile & file ) const

inlineinherited

Has writer file.

Parameters

file

file

Returns

true if file set; else false

Definition at line 69 of file JSelectWriter.hh.

    {
      return writerMask.has(file);
    }

operator()() [5/5]

int JNET::JSelectWriter::operator() ( timeval * timeout = NULL )

inlineinherited

Select call.

Parameters

timeout

timeout

Returns

number of valid file descriptors

Definition at line 102 of file JSelectWriter.hh.

    {
      int nfds = writerMask.getNumberOfFileDescriptors();
 
      nfds += 1;
      nfds  = ::select(nfds, NULL, &writerMask, NULL, timeout);
 
      if (nfds != 0) {
 
        if (nfds < 0) {
          if (errno != EINTR) {
            THROW(JSelectException, "JSelectWriter(..) failed.");
          }
        }
 
      } else {
 
        writerMask.reset(false);    // soft reset
      }
 
      return nfds;
    }

Member Data Documentation

readerMask

JFileDescriptorMask JNET::JSelectReader::readerMask

protectedinherited

Definition at line 127 of file JSelectReader.hh.

writerMask

JFileDescriptorMask JNET::JSelectWriter::writerMask

protectedinherited

Definition at line 127 of file JSelectWriter.hh.

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The documentation for this class was generated from the following file:

• JSelect.hh