hpx::once_flag

Defined in header hpx/mutex.hpp.

See Public API for a list of names and headers that are part of the public HPX API.

See also:

• hpx::call_once

struct once_flag

The class hpx::once_flag is a helper structure for hpx::call_once. An object of type hpx::once_flag that is passed to multiple calls to hpx::call_once allows those calls to coordinate with each other such that only one of the calls will actually run to completion. hpx::once_flag is neither copyable nor movable.