040000 tree a0516d432f3c99147ddcdc7aece53a1b9af6fe04	thread.lock.algorithm
040000 tree 05a54e776a50f63809bdfa3aaf53a3c9039aa622	thread.lock
040000 tree 6f0673f1167f3de6d1f94b0201da6d22d4a960f9	thread.mutex.requirements
040000 tree 09cad4e6e8d94563eb64431beaa572e766fc1781	thread.once