std::once_flag(3) C++ Standard Libary std::once_flag(3) NAME std::once_flag - std::once_flag Synopsis Defined in header <mutex> class once_flag; (since C++11) The class std::once_flag is a helper structure for std::call_once. An object of type std::once_flag that is passed to multiple calls to std::call_once allows those calls to coordinate with each other such that only one of the calls will actually run to completion. std::once_flag is neither copyable nor movable. Member functions std::once_flag::once_flag constexpr once_flag() noexcept; Constructs an once_flag object. The internal state is set to indicate that no function has been called yet. Parameters (none) See also call_once invokes a function only once even if called from multiple threads (C++11) (function template) C documentation for once_flag http://cppreference.com 2024.06.10 std::once_flag(3)
NAME | Synopsis | Member functions | Parameters | See also
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