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      std::barrier<CompletionFunction>::barrier

      From cppreference.com
      <cpp‎ |thread‎ |barrier
       
       
      Concurrency support library
      Threads
      (C++11)
      (C++20)
      this_thread namespace
      (C++11)
      (C++11)
      (C++11)
      Cooperative cancellation
      Mutual exclusion
      Generic lock management
      (C++11)
      (C++11)
      (C++11)
      (C++11)
      Condition variables
      (C++11)
      Semaphores
      Latches and Barriers
      (C++20)
      (C++20)
      Futures
      (C++11)
      (C++11)
      (C++11)
      Safe reclamation
      Hazard pointers
      Atomic types
      (C++11)
      (C++20)
      Initialization of atomic types
      (C++11)(deprecated in C++20)
      (C++11)(deprecated in C++20)
      Memory ordering
      (C++11)(deprecated in C++26)
      Free functions for atomic operations
      Free functions for atomic flags
       
       
      constexprexplicit barrier(std::ptrdiff_t expected,
                                  CompletionFunction f= CompletionFunction());
      (1)(since C++20)
      barrier(const barrier&)= delete;
      (2)(since C++20)
      1) Sets the both initial expected count for each phase and the current expected count for the first phase toexpected, initializes the completion function object withstd::move(f), and then starts the first phase. The behavior is undefined ifexpected is negative or greater thanmax().
      2) Copy constructor is deleted.barrier is neither copyable nor movable.

      [edit]Parameters

      expected - initial value of the expected count
      f - completion function object to be called on phase completion step

      [edit]Exceptions

      1) Any exception thrown byCompletionFunction's move constructor.

      [edit]Notes

      expected is permitted to be zero. However, calling any non-static member function other than the destructor on suchbarrier results in undefined behavior. In other words, suchbarrier can only be destroyed.

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