LinkReadyQ

LinkReadyQ[link] tests whether there is an expression ready to read from the specified MathLink connection.

link must be an active LinkObject, as returned by functions like LinkLaunch or Links.

If LinkReadyQ[link] returns True, then LinkRead[link] will not block under any normal circumstances.

If LinkReadyQ[link] returns False, then LinkRead[link] will block, and will not return until something becomes available to read on link.

LinkReadyQ[link] tests whether there is any data to read; it cannot determine whether the data represents a complete expression.

LinkReadyQ corresponds to the MathLink library function MLReady().

See The Mathematica Book: Section 2.12.6.

See also: LinkRead, LinkWrite, LinkInterrupt.