PTHREAD_COND_TIMEDWAIT (man3p)
pthread_cond_timedwait, pthread_cond_wait — wait on a condition
pthread_cond_timedwait, pthread_cond_wait — wait on a condition
recvfrom — receive a message from a socket
mrand48 — generate uniformly distributed pseudo-random signed long integers
wcrtomb — convert a wide-character code to a character (restartable)
posix_trace_eventtypelist_getnext_id, posix_trace_eventtypelist_rewind — iterate over a mapping of trace event types (TRACING)
munmap — unmap pages of memory
sem_destroy — destroy an unnamed semaphore
llabs — return a long integer absolute value
pthread_mutexattr_getprotocol, pthread_mutexattr_setprotocol — get and set the protocol attribute of the mutex attributes object (REALTIME THREADS)
posix_trace_attr_setstreamsize — retrieve and set trace stream size attributes (TRACING)