Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::interprocess::barrier
// In header: <boost/interprocess/sync/interprocess_barrier.hpp> class barrier { public: // construct/copy/destruct barrier(unsigned int); ~barrier(); // public member functions bool wait() ; };
An object of class barrier is a synchronization primitive that can be placed in shared memory used to cause a set of threads from different processes to wait until they each perform a certain function or each reach a particular point in their execution.
barrier public member functionsbool wait() ;
Effects: Wait until N threads call wait(), where N equals the count provided to the constructor for the barrier object. Note that if the barrier is destroyed before wait() can return, the behavior is undefined. Returns: Exactly one of the N threads will receive a return value of true, the others will receive a value of false. Precisely which thread receives the return value of true will be implementation-defined. Applications can use this value to designate one thread as a leader that will take a certain action, and the other threads emerging from the barrier can wait for that action to take place.