Leon Timmermans > POSIX-RT-Signal > POSIX::RT::Signal

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Module Version: 0.012   Source  

NAME ^

POSIX::RT::Signal - POSIX Real-time signal handling functions

VERSION ^

version 0.012

SYNOPSIS ^

 use POSIX::RT::Signal qw/sigqueue sigwaitinfo/;
 use Signal::Mask;
 
 $Signal::Mask{USR1}++;
 sigqueue($$, 'USR1');
 my $info = sigwaitinfo('USR1');

FUNCTIONS ^

sigqueue($pid, $sig, $value = 0)

Queue a signal $sig to process $pid, optionally with the additional argument $value. On error an exception is thrown. $sig must be either a signal number(14) or a signal name ('ALRM').

sigwaitinfo($signals, $timeout = undef)

Wait for a signal in $signals to arrive and return information on it. The signal handler (if any) will not be called. Unlike signal handlers it is not affected by signal masks, in fact you are expected to mask signals you're waiting for. $signals must either be a POSIX::SigSet object, a signal number or a signal name. If $timeout is specified, it indicates the maximal time the thread is suspended in fractional seconds; if no signal is received it returns an empty list, or in void context an exception. If $timeout is not defined it may wait indefinitely until a signal arrives. On success it returns a hash with the following entries:

Note that not all of these will have meaningful values for all or even most signals

sigtimedwait

This is an alias for sigwaitinfo.

sigwait($signals)

Wait for a signal in $signals to arrive and return it. The signal handler (if any) will not be called. Unlike signal handlers it is not affected by signal masks, in fact you are expected to mask signals you're waiting for. $signals must either be a POSIX::SigSet object, a signal number or a signal name.

allocate_signal($priority)

Pick a signal from the set of signals available to the user. The signal will not be given to any other caller of this function until it has been deallocated. If supported, these will be real-time signals. By default it will choose the lowest priority signal available, but if $priority is true it will pick the highest priority one. If real-time signals are not supported this will return SIGUSR1 and SIGUSR2

deallocate_signal($signal)

Deallocate the signal to be reused for allocate_signal.

SEE ALSO ^

AUTHOR ^

Leon Timmermans <fawaka@gmail.com>

COPYRIGHT AND LICENSE ^

This software is copyright (c) 2011 by Leon Timmermans.

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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