Magenta System Calls Thread nanosleep Handles handle_close handle_duplicate handle_wait_many handle_wait_one Message Pipes message_pipe_create message_read message_write Futexes futex_wait futex_wake futex_requeue IO Ports io_port_create io_port_queue io_port_wait io_port_bind Threads thread_arch_prctl Cryptographically Secure RNG cprng_draw cprng_add_entropy Wait Sets wait_set_create wait_set_add wait_set_remove wait_set_wait