POE::Driver::SysRW(3) User Contributed Perl DocumentationPOE::Driver::SysRW(3)NAMEPOE::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 METHODSPOE::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.
perl v5.14.2 2011-12-15 POE::Driver::SysRW(3)
