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=head1 NAME |
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Coro::RWLock - reader/write locks |
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=head1 SYNOPSIS |
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use Coro::RWLock; |
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$lck = new Coro::RWLock; |
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$lck->rdlock; # acquire read lock |
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$lck->unlock; |
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=head1 DESCRIPTION |
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This module implements reader/write locks. A read can be acquired for |
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read by many coroutines in parallel as long as no writer has locked it |
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(shared access). A single write lock can be acquired when no readers |
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exist. RWLocks basically allow many concurrent readers (without writers) |
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OR a single writer (but no readers). |
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=over 4 |
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=cut |
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package Coro::RWLock; |
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use Coro (); |
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$VERSION = 0.12; |
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die "NYI"; |
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=item $l = new Coro::RWLock; |
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Create a new reader/writer lock. |
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=cut |
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sub new { |
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# [wrcount, rdcount, [readqueue], [waitqueue]] |
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bless [0, 0, [], []], $_[0]; |
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} |
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=item $l->rdlock |
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Acquire a read lock. |
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=item $l->tryrdlock |
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Try to acquire a read lock. |
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=cut |
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sub rdlock { |
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} |
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1; |
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=back |
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=head1 AUTHOR |
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Marc Lehmann <pcg@goof.com> |
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http://www.goof.com/pcg/marc/ |
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=cut |
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