| name | 0.1.5-understand-happens_before_relation |
| description | [0.1.5] A fundamental ordering relation in memory models defining that if operation A happens-before operation B, then |
understand-happens_before_relation
CALL NUMBER: concurrency_synchronization_primitives_and_memor.happens_before_relation
DEFINITION: A fundamental ordering relation in memory models defining that if operation A happens-before operation B, then A's effects are visible to B; forms the basis for reasoning about program correctness in concurrent settings.
Invoke this skill to understand happens_before_relation down to its primitives. The RELATIVE ROOT below is the least-fixed-point closure of everything it bundles from — the full import cone, grouped by the lib each prim comes from. Projected from a prover-typed KB (MAP/SWI-Prolog consistency gate): every reference below resolves.
THE RELATIVE ROOT (the import cone, by lib)
from concurrency_synchronization_primitives_and_memor
- synchronizes_with (d1): A relation between atomic operations in memory models where a release fence on one thread synchronizes with an acquire fence on another thread, establishing happens-before order across threads.
CONSUMERS (what needs this)
c11_memory_model, no_happens_before_establishment, seq_cst_global_total_order, synchronizes_with_absence
Projected from the concurrency synchronization primitives and memory models KB (155 concepts / 137 relations) — consistency-typed by MAP; the facet list after the colon IS the cross-lib dependency web.
(leaf — this is an actual skill.)
