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| OPENMP API Specification: Version 5.1 November 2020

2.19.4  Implementation-Specific Barriers

An OpenMP implementation can execute implementation-specific barriers that are not implied by the OpenMP specification; therefore, no execution model events are bound to these barriers. The implementation can handle these barriers like implicit barriers and dispatch all events as for implicit barriers. These callbacks are dispatched with ompt_sync_region_barrier_implementation — or ompt_sync_region_barrier, if the implementation cannot make a distinction — as the kind argument.