NAME

       POE::Driver::SysRW - buffered, non-blocking I/O using sysread and syswrite

SYNOPSIS

       "SYNOPSIS" in POE::Driver illustrates how the interface works.  This module is merely one
       implementation.

DESCRIPTION

       This driver implements POE::Driver using sysread and syswrite.

PUBLIC METHODS

       POE::Driver::SysRW introduces some additional features not covered in the base interface.

   new [BlockSize => OCTETS]
       new() creates a new buffered I/O driver that uses sysread() to read data from a handle and
       syswrite() to flush data to that handle.  The constructor accepts one optional named
       parameter, "BlockSize", which indicates the maximum number of OCTETS that will be read at
       one time.

       "BlockSize" is 64 kilobytes (65536 octets) by default.  Higher values may improve
       performance in streaming applications, but the trade-off is a lower event granularity and
       increased resident memory usage.

       Lower "BlockSize" values reduce memory consumption somewhat with corresponding throughput
       penalties.

         my $driver = POE::Driver::SysRW->new;

         my $driver = POE::Driver::SysRW->new( BlockSize => $block_size );

       Drivers are commonly instantiated within POE::Wheel constructor calls:

         $_[HEAP]{wheel} = POE::Wheel::ReadWrite->new(
           InputHandle => \*STDIN,
           OutputHandle => \*STDOUT,
           Driver => POE::Driver::SysRW->new(),
           Filter => POE::Filter::Line->new(),
         );

       Applications almost always use POE::Driver::SysRW, so POE::Wheel objects almost always
       will create their own if no Driver is specified.

   All Other Methods
       POE::Driver::SysRW documents the abstract interface documented in POE::Driver.  Please see
       POE::Driver for more details about the following methods:

       flush
       get
       get_out_messages_buffered
       put

SEE ALSO

       POE::Driver, POE::Wheel.

       Also see the SEE ALSO section of POE, which contains a brief roadmap of POE's
       documentation.

AUTHORS & COPYRIGHTS

       Please see POE for more information about authors and contributors.