This class abstracts the Unix system call "poll". More...

#include <Poll.hxx>

Classes
class	FDEntry
Public Member Functions
	Poll ()
	~Poll ()
const std::vector < Poll::FDEntry * > &	beforeExternWait ()
bool	setEntryFDStateForExternWait (int fd, Poll::FDEntry::StateBitMask fdStateBitMask)
const std::vector < Poll::FDEntry * > &	afterExternWait ()
Static Public Member Functions
static int	findFDInWaitResult (int fd, const std::vector< Poll::FDEntry * > &waitResult)
Private Member Functions
	Poll (const Poll &from)
	defined(RESIP_POLL_EXTERN) }
Poll &	operator= (const Poll &from)
Private Attributes
std::vector< Poll::FDEntry * >	_fdEntryVector
int	_maxFDPlus1
fd_set	_readFDSet
fd_set	_writeFDSet
std::map< int, Poll::FDEntry * >	_fdEntryMap
std::vector< Poll::FDEntry * >	_waitResult
Friends
class	Poll::FDEntry

Detailed Description

This class abstracts the Unix system call "poll".

It offers implementations in terms of "poll" itself, "epoll", and "select". (Respectively #ifdef'd by RESIP_POLL_IMPL_POLL, RESIP_POLL_IMPL_SELECT, and RESIP_POLL_IMPL_EPOLL.) File descriptors are wrapped by inner class "Poll::FDEntry". The actual "poll" call is represented by method "wait", or if an application wants to control the system call directly, it can instead use methods "beforeExternWait", "setEntryFDStateForExternWait", and "afterExternWait". (The latter are selected by #define-ing RESIP_POLL_EXTERN.)

Definition at line 51 of file Poll.hxx.

Constructor & Destructor Documentation

Poll::Poll ( )

Definition at line 127 of file Poll.cxx.

References _readFDSet, and _writeFDSet.

   :
_maxFDPlus1(0) 
#endif
{
#ifdef RESIP_POLL_IMPL_SELECT
   FD_ZERO(&_readFDSet);
   FD_ZERO(&_writeFDSet);
#endif
}

Poll::~Poll ( )

Definition at line 140 of file Poll.cxx.

{
}

resip::Poll::Poll ( const Poll & from ) [private]

defined(RESIP_POLL_EXTERN) }

Member Function Documentation

const std::vector<Poll::FDEntry *>& resip::Poll::afterExternWait ( )

const std::vector<Poll::FDEntry *>& resip::Poll::beforeExternWait ( )

int Poll::findFDInWaitResult	(	int	fd,
		const std::vector< Poll::FDEntry * > &	waitResult
	)		`[static]`

Definition at line 105 of file Poll.cxx.

{
   unsigned int lowIndex = 0;
   unsigned int highIndex = (unsigned int)waitResult.size();
   while (lowIndex + 1 < highIndex) 
   {
      // The goal fd is in waitResult in the range [lowIndex, highIndex[.
      unsigned int midIndex = (lowIndex + highIndex) / 2;
      if (waitResult[midIndex]->_fd > fd) 
      {
         highIndex = midIndex - 1;
      } 
      else 
      {
         lowIndex = midIndex;
      }
   }//while
   return lowIndex;
}