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ForeignCallback[…]

represents a foreign callback that can be called from external libraries.

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ForeignCallback

ForeignCallback[…]

represents a foreign callback that can be called from external libraries.

Details

Examples

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Basic Examples  (1)

Load a foreign function that takes a function pointer:

Wolfram Language code: createArray = ForeignFunctionLoad["compilerDemoBase", "createArray", {"OpaqueRawPointer"} -> "RawPointer"::["CLong"]]

Create a foreign callback function:

Wolfram Language code: cbFun = CreateForeignCallback[EchoEvaluation[# ^ 2]&, {"CLong"} -> "CLong"]

Call the foreign function and pass the foreign callback:

Wolfram Language code: ptr = createArray[cbFun]
02
0
12
1
22
4
32
9
42
16
52
25
62
36
72
49
82
64
92
81

Read the output:

Wolfram Language code: RawMemoryImport[ptr, {"List", 10}]

Scope  (1)

Information  (1)

Create a foreign callback:

Wolfram Language code: cb = CreateForeignCallback[EchoEvaluation[# ^ 2]&, {"CLong"} -> "CLong"]

Get Information about the callback:

Wolfram Language code: Information[cb["Value"]]
Wolfram Research (2023), ForeignCallback, Wolfram Language function, https://reference.wolfram.com/language/ref/ForeignCallback.html.

Text

Wolfram Research (2023), ForeignCallback, Wolfram Language function, https://reference.wolfram.com/language/ref/ForeignCallback.html.

CMS

Wolfram Language. 2023. "ForeignCallback." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/ForeignCallback.html.

APA

Wolfram Language. (2023). ForeignCallback. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ForeignCallback.html

BibTeX

@misc{reference.wolfram_2026_foreigncallback, author="Wolfram Research", title="{ForeignCallback}", year="2023", howpublished="\url{https://reference.wolfram.com/language/ref/ForeignCallback.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_foreigncallback, organization={Wolfram Research}, title={ForeignCallback}, year={2023}, url={https://reference.wolfram.com/language/ref/ForeignCallback.html}, note=[Accessed: 12-June-2026]}