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::interprocess_condition
// In header: <boost/interprocess/sync/interprocess_condition.hpp> class interprocess_condition { public: // construct/copy/destruct interprocess_condition(); ~interprocess_condition(); // public member functions void notify_one() ; void notify_all() ; template<typename L> void wait(L &) ; template<typename L, typename Pr> void wait(L &, Pr) ; template<typename L> bool timed_wait(L &, const boost::posix_time::ptime &) ; template<typename L, typename Pr> bool timed_wait(L &, const boost::posix_time::ptime &, Pr) ; };
This class is a condition variable that can be placed in shared memory or memory mapped files.
interprocess_condition public member functionsvoid notify_one() ;
If there is a thread waiting on *this, change that thread's state to ready. Otherwise there is no effect.
void notify_all() ;
Change the state of all threads waiting on *this to ready. If there are no waiting threads, notify_all() has no effect.
template<typename L> void wait(L & lock) ;
Releases the lock on the interprocess_mutex object associated with lock, blocks the current thread of execution until readied by a call to this->notify_one() or this->notify_all(), and then reacquires the lock.
template<typename L, typename Pr> void wait(L & lock, Pr pred) ;
The same as: while (!pred()) wait(lock)
template<typename L> bool timed_wait(L & lock, const boost::posix_time::ptime & abs_time) ;
Releases the lock on the interprocess_mutex object associated with lock, blocks the current thread of execution until readied by a call to this->notify_one() or this->notify_all(), or until time abs_time is reached, and then reacquires the lock. Returns: false if time abs_time is reached, otherwise true.
template<typename L, typename Pr> bool timed_wait(L & lock, const boost::posix_time::ptime & abs_time, Pr pred) ;
The same as: while (!pred()) { if (!timed_wait(lock, abs_time)) return pred(); } return true;