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OpaqueRawPointer[addr]

represents an untyped pointer to the memory address addr.

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OpaqueRawPointer

OpaqueRawPointer[addr]

represents an untyped pointer to the memory address addr.

Details

Examples

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Basic Examples  (1)

Get the pointer to a function in a library:

Wolfram Language code: funPtr = ForeignPointerLookup["compilerDemoBase", "addone"]

This pointer can be used to load a foreign function:

Wolfram Language code: fun = ForeignFunctionLoad[funPtr, {"CInt"} -> "CInt"]

Call the foreign function:

Wolfram Language code: fun[41]

Scope  (1)

Information  (1)

Get the pointer to a function in a library:

Wolfram Language code: ptr = ForeignPointerLookup["compilerDemoBase", "addone"]

Get Information about the pointer:

Wolfram Language code: Information[ptr]

Get the memory address of the pointer:

Wolfram Language code: ptr["Address"]

Properties & Relations  (3)

NullRawPointerQ returns True if an opaque raw pointer has 0 as its address:

Wolfram Language code: NullRawPointerQ[OpaqueRawPointer[0]]

Get the pointer to a function in a library:

Wolfram Language code: opaqueRawPtr = ForeignPointerLookup["compilerDemoBase", "addone"]

Convert an OpaqueRawPointer into a RawPointer:

Wolfram Language code: rawPtr = RawPointer[opaqueRawPtr, "UnsignedInteger8"]

Convert the raw pointer back to an OpaqueRawPointer:

Wolfram Language code: OpaqueRawPointer[rawPtr]

Create a foreign callback function:

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

Obtain its function pointer:

Wolfram Language code: cbFun["Value"]["FunctionPointer"]

Possible Issues  (1)

OpaqueRawPointer returns a Failure for invalid memory addresses:

Wolfram Language code: OpaqueRawPointer["0xAABBCC"]
Wolfram Research (2023), OpaqueRawPointer, Wolfram Language function, https://reference.wolfram.com/language/ref/OpaqueRawPointer.html.

Text

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

CMS

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

APA

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

BibTeX

@misc{reference.wolfram_2026_opaquerawpointer, author="Wolfram Research", title="{OpaqueRawPointer}", year="2023", howpublished="\url{https://reference.wolfram.com/language/ref/OpaqueRawPointer.html}", note=[Accessed: 13-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_opaquerawpointer, organization={Wolfram Research}, title={OpaqueRawPointer}, year={2023}, url={https://reference.wolfram.com/language/ref/OpaqueRawPointer.html}, note=[Accessed: 13-June-2026]}