1Signal(3)             User Contributed Perl Documentation            Signal(3)
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NAME

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

9        use Coro;
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11        my $sig = new Coro::Signal;
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13        $sig->wait; # wait for signal
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15        # ... some other "thread"
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17        $sig->send;
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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.
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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 :->
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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.
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32       $sig = new Coro::Signal;
33           Create a new signal.
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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.
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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.
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44           The callback might wake up any number of threads, but is NOT
45           allowed to block (switch to other threads).
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47       $sig->send
48           Send the signal, waking up one waiting process or remember the
49           signal if no process is waiting.
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51       $sig->broadcast
52           Send the signal, waking up all waiting process. If no process is
53           waiting the signal is lost.
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55       $sig->awaited
56           Return true when the signal is being awaited by some process.
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AUTHOR/SUPPORT/CONTACT

59          Marc A. Lehmann <schmorp@schmorp.de>
60          http://software.schmorp.de/pkg/Coro.html
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64perl v5.34.0                      2022-01-21                         Signal(3)
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