[Boost-bugs] [Boost C++ Libraries] #9569: Upgrade lock is not acquired when previous upgrade lock releases if another read lock is present

Subject: [Boost-bugs] [Boost C++ Libraries] #9569: Upgrade lock is not acquired when previous upgrade lock releases if another read lock is present
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-01-13 14:53:58

#9569: Upgrade lock is not acquired when previous upgrade lock releases if another
read lock is present
-------------------------------------------+-------------------------------
 Reporter:  Rodionov Andrew <camelot58@…>  |       Type:  Bugs
   Status:  new                            |  Milestone:  To Be Determined
Component:  None                           |    Version:  Boost 1.55.0
 Severity:  Problem                        |   Keywords:  shared_mutex
                                           |  windows
-------------------------------------------+-------------------------------
 The problem is described here
 https://svn.boost.org/trac/boost/ticket/5516. Example and result are the
 same. The only difference is that I use
 <boost/thread/win32/shared_mutex.hpp> instead of
 <boost/thread/pthread/shared_mutex.hpp>.

 I tried to compile with BOOST_THREAD_PROVIDES_GENERIC_SHARED_MUTEX_ON_WIN
 flag and everything goes right. So the problem is in function
 unlock_upgrade() in <boost/thread/win32/shared_mutex.hpp>.

 My platform: Windows 7 x64, MS VS 2012.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9569>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.