040000 tree a0516d432f3c99147ddcdc7aece53a1b9af6fe04	thread.lock.algorithm
040000 tree 27887d7f2addbf8ae430bf4ee071675c2d1122c9	thread.lock
040000 tree e14288d0333bd7db6ee8c36b4bfdb7d3e8221031	thread.mutex.requirements
040000 tree 09cad4e6e8d94563eb64431beaa572e766fc1781	thread.once