Subject: [Boost-bugs] [Boost C++ Libraries] #5502: race condition between shared_mutex timed_lock and lock_shared
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-04-25 18:05:13
#5502: race condition between shared_mutex timed_lock and lock_shared
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Reporter: eliothorowitz@⦠| Owner: anthonyw
Type: Bugs | Status: new
Milestone: To Be Determined | Component: thread
Version: Boost Release Branch | Severity: Showstopper
Keywords: |
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There is a potential race condition between 3 threads.
Thread 1 - has a shared lock
Thread 2 - goes into a timed_lock loop with a small sleep
Thread 3 - tries shared_lock
Expected behavior: Thread 3 gets the lock when thread 2 fails to get
exclusive lock.
What happens: based on timing, there can be a race condition causing a
hang unless Thread 1 releases the lock.
Test and patch for boost-trunk that fixes the problem for me attached.
-- Ticket URL: <https://svn.boost.org/trac/boost/ticket/5502> Boost C++ Libraries <http://www.boost.org/> Boost provides free peer-reviewed portable C++ source libraries.
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