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

6       Coro::RWLock - reader/write locks
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SYNOPSIS

9        use Coro;
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11        $lck = new Coro::RWLock;
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13        $lck->rdlock; # acquire read lock
14        $lck->unlock; # unlock lock again
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16        # or:
17        $lck->wrlock; # acquire write lock
18        $lck->tryrdlock; # try a readlock
19        $lck->trywrlock; # try a write lock
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DESCRIPTION

22       This module implements reader/write locks. A read can be acquired for
23       read by many coroutines in parallel as long as no writer has locked it
24       (shared access). A single write lock can be acquired when no readers
25       exist. RWLocks basically allow many concurrent readers (without
26       writers) OR a single writer (but no readers).
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28       You don't have to load "Coro::RWLock" manually, it will be loaded
29       automatically when you "use Coro" and call the "new" constructor.
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31       $l = new Coro::RWLock;
32           Create a new reader/writer lock.
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34       $l->rdlock
35           Acquire a read lock.
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37       $l->tryrdlock
38           Try to acquire a read lock.
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40       $l->wrlock
41           Acquire a write lock.
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43       $l->trywrlock
44           Try to acquire a write lock.
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46       $l->unlock
47           Give up a previous "rdlock" or "wrlock".
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AUTHOR/SUPPORT/CONTACT

50          Marc A. Lehmann <schmorp@schmorp.de>
51          http://software.schmorp.de/pkg/Coro.html
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55perl v5.28.0                      2017-08-31                         RWLock(3)