Re: [Boost-bugs] [Boost C++ Libraries] #11499: exception lock_error while intensive locking/unlocking of shared_mutex on many threads

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11499: exception lock_error while intensive locking/unlocking of shared_mutex on many threads
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-07-30 07:25:25

#11499: exception lock_error while intensive locking/unlocking of shared_mutex on
many threads
-------------------------------------+----------------------
  Reporter:  andrew maclean <agm@…>  |      Owner:  anthonyw
      Type:  Bugs                    |     Status:  new
 Milestone:  To Be Determined        |  Component:  thread
   Version:  Boost 1.59.0            |   Severity:  Problem
Resolution:                          |   Keywords:
-------------------------------------+----------------------

Comment (by andrew maclean <agm@…>):

 Replying to [ticket:11499 andrew maclean <agm@…>]:
 >
 > {{{
 > #include "stdafx.h"
 > #include <boost/thread/shared_mutex.hpp>
 > #include <thread>
 > #include <mutex>
 > #include <shared_mutex>
 > #include <atomic>
 > #include <vector>
 >
 > using MutexT = boost::shared_mutex;
 > using ReaderLockT = std::lock_guard<MutexT>;
 > using WriterLockT = std::shared_lock<MutexT>;
 >
 > MutexT gMutex;
 > std::atomic<bool> running = true;
 >
 >
 > void threadfunc()
 > {
 >    while (running)
 >    {
 >       ReaderLockT lock(gMutex);  // exception - eventually... (ymmv)
 >       std::this_thread::yield();
 >    }
 > }
 >
 > int main()
 > {
 >    using namespace std;
 >
 >    vector<thread> threads;
 >    for (int i = 0; i < 256; ++i)
 >    {
 >       threads.emplace_back(thread(threadfunc));
 >    }
 >
 >    string str;
 >
 >    getline(std::cin, str);
 >    running = false;
 >
 >    for (auto& thread : threads)
 >    {
 >       thread.join();
 >    }
 >
 >    return 0;
 > }
 >
 >
 > }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11499#comment:4>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.