Coro::RWLock(3) 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->tryrdlock; # try a readlock
$lck->trywrlock; # try a write lock


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.

$l = new Coro::RWLock;
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".


   Marc A. Lehmann <[email protected]>