Coro::RWLock - reader/write locks
use Coro; $lck = new Coro::RWLock; $lck->rdlock; # acquire read lock $lck->unlock; # unlock lock again # or: $lck->wrlock; # acquire write lock $lck->unlock; # unlock lock again # try a readlock if ($lck->tryrdlock) { ...; $l->unlock; } # try a write lock if ($lck->trywrlock) { ...; $l->unlock; }
This module implements reader/write locks. A read can be acquired for read by many coroutines in parallel as long as no writer has locked it (shared access). A single write lock can be acquired when no readers exist. RWLocks basically allow many concurrent readers (without writers) OR a single writer (but no readers).
You don't have to load Coro::RWLock manually, it will be loaded automatically when you use Coro and call the new constructor.
Coro::RWLock
use Coro
new
Create a new reader/writer lock.
Acquire a read lock.
Try to acquire a read lock.
Acquire a write lock.
Try to acquire a write lock.
Give up a previous rdlock or wrlock.
rdlock
wrlock
Marc A. Lehmann <schmorp@schmorp.de> http://software.schmorp.de/pkg/Coro.html
To install Coro, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Coro
CPAN shell
perl -MCPAN -e shell install Coro
For more information on module installation, please visit the detailed CPAN module installation guide.