[Boost-bugs] [Boost C++ Libraries] #8884: boost asio in posix_event: lock release before condition signaled

Subject: [Boost-bugs] [Boost C++ Libraries] #8884: boost asio in posix_event: lock release before condition signaled
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-07-23 09:47:28

#8884: boost asio in posix_event: lock release before condition signaled
-------------------------------+----------------------------
 Reporter:  carsten.becker@…   |      Owner:  chris_kohlhoff
     Type:  Bugs               |     Status:  new
Milestone:  To Be Determined   |  Component:  asio
  Version:  Boost 1.54.0       |   Severity:  Problem
 Keywords:  race multi-thread  |
-------------------------------+----------------------------
 valgrind drd warns about a possible race condition ...
 (possible patch:)

 Index: boost/asio/detail/posix_event.hpp
 ===================================================================
 --- boost/asio/detail/posix_event.hpp   (Revision 85130)
 +++ boost/asio/detail/posix_event.hpp   (Arbeitskopie)
 @@ -58,8 +58,8 @@
    {
      BOOST_ASIO_ASSERT(lock.locked());
      signalled_ = true;
 +    ::pthread_cond_signal(&cond_); // Ignore EINVAL.
      lock.unlock();
 -    ::pthread_cond_signal(&cond_); // Ignore EINVAL.
    }

    // Reset the event.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8884>
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