std::barrier<CompletionFunction>::barrier
From cppreference.com
| constexpr explicit 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 to expected, initializes the completion function object with std::move(f), and then starts the first phase. The behavior is undefined if expected is negative or greater than
max().2) Copy constructor is deleted.
barrier is neither copyable nor movable.Parameters
| expected | - | initial value of the expected count |
| f | - | completion function object to be called on phase completion step |
Exceptions
1) Any exception thrown by
CompletionFunction's move constructor.Notes
expected is permitted to be zero. However, calling any non-static member function other than the destructor on such barrier results in undefined behavior. In other words, such barrier can only be destroyed.