040000 tree a0516d432f3c99147ddcdc7aece53a1b9af6fe04	thread.lock.algorithm
040000 tree 35e57b500ade84b78e678bdef19a0c4d4633f5ff	thread.lock
040000 tree 70f7c062aea1371c71e6e58e850a56e62b78e715	thread.mutex.requirements
040000 tree 09cad4e6e8d94563eb64431beaa572e766fc1781	thread.once