Re: [Boost-bugs] [Boost C++ Libraries] #7720: exception lock_error while intensive locking/unlocking of mutex

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #7720: exception lock_error while intensive locking/unlocking of mutex
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-11-23 06:36:01

#7720: exception lock_error while intensive locking/unlocking of mutex
----------------------------------------+-----------------------------------
  Reporter:  sergey.stepanov@…          |       Owner:  viboes    
      Type:  Bugs                       |      Status:  assigned  
 Milestone:  To Be Determined           |   Component:  thread    
   Version:  Boost 1.51.0               |    Severity:  Problem   
Resolution:                             |    Keywords:  lock_error
----------------------------------------+-----------------------------------
Changes (by viboes):

  * owner:  anthonyw => viboes
  * status:  new => assigned


Old description:

> Hi, Anthony and Vicente.
>
> ////////////////////////////////////////////
> #include <boost/thread/thread.hpp>
> using namespace boost;
>
> shared_mutex mtx;
>
> void f()
> {
>     while (true)
>     {
>         upgrade_lock<shared_mutex> lock(mtx);
>     }
> }
>
> void g()
> {
>     while (true)
>     {
>         shared_lock<shared_mutex> lock(mtx);
>     }
> }
>
> void h()
> {
>     while (true)
>     {
>         unique_lock<shared_mutex> lock(mtx);
>     }
> }
>
> int main()
> {
>     thread t0(f);
>     thread t1(g);
>     thread t2(h);
>
>     t0.join();
>     t1.join();
>     t2.join();
>
>     return 0;
> }
> ////////////////////////////////////////////
>
> I ran this program and got exception boost::lock_error in some minutes.
>
> Used MS VS 2005 Version 8.0.50727.867, Boost C++ Libraries 1.51 and MS
> Windows 7 Pro version 6.1.7601 SP1.
>
> Regards, Sergey.

New description:

 Hi, Anthony and Vicente.


 {{{
 ////////////////////////////////////////////
 #include <boost/thread/thread.hpp>
 using namespace boost;

 shared_mutex mtx;

 void f()
 {
     while (true)
     {
         upgrade_lock<shared_mutex> lock(mtx);
     }
 }

 void g()
 {
     while (true)
     {
         shared_lock<shared_mutex> lock(mtx);
     }
 }

 void h()
 {
     while (true)
     {
         unique_lock<shared_mutex> lock(mtx);
     }
 }

 int main()
 {
     thread t0(f);
     thread t1(g);
     thread t2(h);

     t0.join();
     t1.join();
     t2.join();

     return 0;
 }
 ////////////////////////////////////////////
 }}}


 I ran this program and got exception boost::lock_error in some minutes.

 Used MS VS 2005 Version 8.0.50727.867, Boost C++ Libraries 1.51 and MS
 Windows 7 Pro version 6.1.7601 SP1.

 Regards, Sergey.

--
Comment:
 Please, could you try defining
 BOOST_THREAD_PROVIDES_GENERIC_SHARED_MUTEX_ON_WIN to see if the error
 persist on the generic implementation?
-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7720#comment:1>
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