tk::io(3pm) [debian man page]

IO(3pm) 						User Contributed Perl Documentation						   IO(3pm)

NAME

       Tk::IO - high level interface to Tk's 'fileevent' mechanism

SYNOPSIS

	 my $fh = Tk::IO->new(-linecommand => callback, -childcommand => callback);
	 $fh->exec("command")
	 $fh->wait
	 $fh->kill

WARNING

       INTERFACES TO THIS MODULE MAY CHANGE AS PERL'S IO EVOLVES AND WITH PORT OF TK4.1

DESCRIPTION

       Tk::IO is now layered on perl's IO::Handle class. Interfaces have changed, and are still evolving.

       In theory C methods which enable non-blocking IO as in earlier Tk-b* release(s) are still there. I have not changed them to use perl's
       additional Configure information, or tested them much.

       Assumption is that exec is used to fork a child process and a callback is called each time a complete line arrives up the implied pipe.

       "line" should probably be defined in terms of perl's input record separator but is not yet.

       The -childcommand callback is called when end-of-file occurs.

       $fh->wait can be used to wait for child process while processing other Tk events.

       $fh->kill can be used to send signal to child process.

BUGS

       Still not finished.  Idea is to use "exec" to emulate "system" in a non-blocking manner.

perl v5.14.2							    2010-05-29								   IO(3pm)

Signal(3pm)						User Contributed Perl Documentation					       Signal(3pm)

NAME

       Coro::Signal - thread signals (binary semaphores)

SYNOPSIS

	use Coro;

	$sig = new Coro::Signal;

	$sig->wait; # wait for signal

	# ... some other "thread"

	$sig->send;

DESCRIPTION

       This module implements signals/binary semaphores/condition variables (basically all the same thing). You can wait for a signal to occur or
       send it, in which case it will wake up one waiter, or it can be broadcast, waking up all waiters.

       It is recommended not to mix "send" and "broadcast" calls on the same "Coro::Signal" - it should work as documented, but it can easily
       confuse you :->

       You don't have to load "Coro::Signal" manually, it will be loaded automatically when you "use Coro" and call the "new" constructor.

       $sig = new Coro::Signal;
	   Create a new signal.

       $sig->wait
	   Wait for the signal to occur (via either "send" or "broadcast"). Returns immediately if the signal has been sent before.

       $sem->wait ($callback)
	   If you pass a callback argument to "wait", it will not wait, but immediately return. The callback will be called under the same
	   conditions as "wait" without arguments would continue the thrad.

	   The callback might wake up any number of threads, but is NOT allowed to block (switch to other threads).

       $sig->send
	   Send the signal, waking up one waiting process or remember the signal if no process is waiting.

       $sig->broadcast
	   Send the signal, waking up all waiting process. If no process is waiting the signal is lost.

       $sig->awaited
	   Return true when the signal is being awaited by some process.

AUTHOR

	Marc Lehmann <schmorp@schmorp.de>
	http://home.schmorp.de/

perl v5.14.2							    2012-04-13							       Signal(3pm)