POE::Driver::SysRW - phpMan

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.