1Signal(3)             User Contributed Perl Documentation            Signal(3)
2
3
4

NAME

6       Coro::Signal - thread signals (binary semaphores)
7

SYNOPSIS

9        use Coro;
10
11        my $sig = new Coro::Signal;
12
13        $sig->wait; # wait for signal
14
15        # ... some other "thread"
16
17        $sig->send;
18

DESCRIPTION

20       This module implements signals/binary semaphores/condition variables
21       (basically all the same thing). You can wait for a signal to occur or
22       send it, in which case it will wake up one waiter, or it can be
23       broadcast, waking up all waiters.
24
25       It is recommended not to mix "send" and "broadcast" calls on the same
26       "Coro::Signal" without some deep thinking: while it should work as
27       documented, it can easily confuse you :->
28
29       You don't have to load "Coro::Signal" manually, it will be loaded
30       automatically when you "use Coro" and call the "new" constructor.
31
32       $sig = new Coro::Signal;
33           Create a new signal.
34
35       $sig->wait
36           Wait for the signal to occur (via either "send" or "broadcast").
37           Returns immediately if the signal has been sent before.
38
39       $sig->wait ($callback)
40           If you pass a callback argument to "wait", it will not wait, but
41           immediately return. The callback will be called under the same
42           conditions as "wait" without arguments would continue the thrad.
43
44           The callback might wake up any number of threads, but is NOT
45           allowed to block (switch to other threads).
46
47       $sig->send
48           Send the signal, waking up one waiting process or remember the
49           signal if no process is waiting.
50
51       $sig->broadcast
52           Send the signal, waking up all waiting process. If no process is
53           waiting the signal is lost.
54
55       $sig->awaited
56           Return true when the signal is being awaited by some process.
57

AUTHOR/SUPPORT/CONTACT

59          Marc A. Lehmann <schmorp@schmorp.de>
60          http://software.schmorp.de/pkg/Coro.html
61
62
63
64perl v5.30.0                      2019-07-26                         Signal(3)
Impressum