040000 tree 4f546475e1b93f035cf23ee6ad9a5bfa0326a6a0	thread.lock.algorithm
040000 tree 3d30829d35426df022e8e9b76f5fb0bbeda070ae	thread.lock
040000 tree c296c4e7726d169600d61a160c070a4ce83ca619	thread.mutex.requirements
040000 tree c358bca73af57d74c82a3d043ce42bcb97f24ead	thread.once