6.2.6 Sockets.AbstractSocketImpl: asynchronous operations

ensureReadable

If the file is open, wait until data can be read from it. The wait allows other Processes to run.

ensureWriteable

If the file is open, wait until we can write to it. The wait allows other Processes to run.

waitForException

If the file is open, wait until an exceptional condition (such as presence of out of band data) has occurred on it. The wait allows other Processes to run.