Nonalertable

A file-copying example highlights NT's potent asynchronous I/O features, contrasting the extended (i.e., alertable) read, write, and wait functions with their standard (i.e., nonalertable) counterparts.

The bottom line: perform nonalertable waits unless you know you shouldn't.

Blocking is done with a nonalertable wait, and waiters are released in a roughly FIFO order, although the lock is unfair and will permit concurrent acquisition attempts to succeed.