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Damien Krotkine > PerlIO-via-Timeout-0.29 > PerlIO::via::Timeout

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Module Version: 0.29   Source   Latest Release: PerlIO-via-Timeout-0.32

NAME ^

PerlIO::via::Timeout - a PerlIO layer that adds read & write timeout to a handle

VERSION ^

version 0.29

SYNOPSIS ^

  use Errno qw(ETIMEDOUT);
  use PerlIO::via::Timeout qw(:all);
  open my $fh, '<:via(Timeout)', 'foo.html';

  # set the timeout layer to be 0.5 second read timeout
  read_timeout($fh, 0.5);

  my $line = <$fh>;
  if ($line == undef && 0+$! == ETIMEDOUT) {
    # timed out
    ...
  }

DESCRIPTION ^

This package implements a PerlIO layer, that adds read / write timeout. This can be useful to avoid blocking while accessing a handle (file, socket, ...), and fail after some time.

The timeout is implemented by using <select> on the handle before reading/writing.

WARNING the handle won't timeout if you use sysread or syswrite on it, because these functions works at a lower level. Hower if you're trying to implement a timeout for a socket, see IO::Socket::Timeout that implements exactly that.

FUNCTIONS ^

read_timeout

  # set a read timeout of 2.5 seconds
  read_timeout($fh, 2.5);
  # get the current read timeout
  my $secs = read_timeout($fh);

Getter / setter of the read timeout value.

write_timeout

  # set a write timeout of 2.5 seconds
  timeout_layer($fh)->write_timeout(2.5);
  # get the current write timeout
  my $secs = timeout_layer($fh)->write_timeout();

Getter / setter of the write timeout value.

enable_timeout

  enable_timeout($fh);

Equivalent to setting timeout_enabled to 1

disable_timeout

  timeout_layer($fh)->disable_timeout();

Equivalent to setting timeout_enabled to 0

timeout_enabled

  # disable timeout
  timeout_enabled($fh, 0);
  # enable timeout
  timeout_enabled($fh, 1);
  # get the current status
  my $is_enabled = timeout_enabled($fh);

Getter / setter of the timeout enabled flag.

SEE ALSO ^

PerlIO::via

THANKS TO ^

Vincent Pit
Christian Hansen
Leon Timmmermans

AUTHOR ^

Damien "dams" Krotkine

COPYRIGHT AND LICENSE ^

This software is copyright (c) 2013 by Damien "dams" Krotkine.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

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