PTHREAD_SPIN_DESTROY (man3p)
pthread_spin_destroy, pthread_spin_init — destroy or initialize a spin lock object
pthread_spin_destroy, pthread_spin_init — destroy or initialize a spin lock object
fpathconf, pathconf — get configurable pathname variables
waitpid — wait for a child process to stop or terminate
pthread_rwlock_destroy, pthread_rwlock_init — destroy and initialize a read-write lock object
exp2, exp2f, exp2l — exponential base 2 functions
fwprintf, swprintf, wprintf — print formatted wide-character output
posix_spawn_file_actions_addclose, posix_spawn_file_actions_addopen — add close or open action to spawn file actions object (ADVANCED REALTIME)
fseek, fseeko — reposition a file-position indicator in a stream
fgetwc — get a wide-character code from a stream
fexecve — execute a file