aio_suspend(2) on FreeBSD
The text 45f7b83ccf1e, as FreeBSD 7.0-RELEASE, FreeBSD 6.3-RELEASE, FreeBSD 6.2-RELEASE, FreeBSD 6.1-RELEASE, FreeBSD 6.0-RELEASE shipped it.
suspend until asynchronous I/O operations or timeout complete (REALTIME)
The text 45f7b83ccf1e, as FreeBSD 7.0-RELEASE, FreeBSD 6.3-RELEASE, FreeBSD 6.2-RELEASE, FreeBSD 6.1-RELEASE, FreeBSD 6.0-RELEASE shipped it.
suspend until asynchronous I/O operations or timeout complete (REALTIME)