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BUILT-IN MATHEMATICA SYMBOL

LinkReadyQ

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

waits for up to t seconds to see if an expression becomes ready to read.

tests all the

in parallel, returning as soon as any of them are ready to read from.

The must be active LinkObject objects, as returned by functions like LinkLaunch or Links.

LinkReadyQ returns a list of True and False, specifying which of the are ready to read from.

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.

The basic form of LinkReadyQ corresponds to the MathLink library function MLReady().

Launch a subsidiary Mathematica kernel process:

Test whether there is an expression ready to be read:

Read the expression:

Close the link:

Launch a subsidiary Mathematica kernel process:

Out[1]=

Test whether there is an expression ready to be read:

Out[2]=

Read the expression:

Out[3]=

Close the link: