LibraryFunctionLoad [lib,fun,argtype,rettype]
loads Wolfram Library lib and makes the library function fun available in the Wolfram Language.
LibraryFunctionLoad
LibraryFunctionLoad [lib,fun,argtype,rettype]
loads Wolfram Library lib and makes the library function fun available in the Wolfram Language.
Details and Options
- Arguments of LibraryFunctionLoad are:
-
lib library to be loadedfun function name as specified in the library fileargtypes list of argument typesrettype return type
- Possible argument and return types, and their corresponding C type, include:
-
_Integer mint machine integer_Real double machine double_Complex mcomplex machine complex double{dt,r} MTensor tensor with element data type dt and rank r"UTF8String" char* string in UTF-8 encodingLinkObject WSLINK arguments and result passed over WSTP"Void" void no result (return only)
- LibraryFunctionLoad returns the LibraryFunction object.
- LibraryFunctionLoad can be called more than once with the same arguments returning the same LibraryFunction object.
- LibraryFunctionLoad uses FindLibrary to locate libraries found on $LibraryPath .
- When a Wolfram Library is loaded, an initialization function in the library is called.
- When a Wolfram Library is unloaded, an uninitialization function in the library is called.
- Libraries loaded by LibraryFunctionLoad run in the same process as the Wolfram Language kernel.
- Functions in libraries loaded by LibraryFunctionLoad can make callbacks to the Wolfram Language.
- Libraries loaded by LibraryFunctionLoad can share data with the Wolfram Language kernel.
- LibraryFunctionUnload unloads a LibraryFunction so that it can no longer be used.
- Libraries loaded by LibraryFunctionLoad are unloaded when the Wolfram Language kernel exits.
- Libraries loaded by LibraryFunctionLoad must be written as a dynamic library for the platform on which they run.
Examples
open all close allBasic Examples (3)
Load a function from a sample library:
Call the function:
You can call LibraryFunctionLoad more than once for the same input:
Load a function from the library, which will exchange data over WSTP:
Load a function, which calls back to the Wolfram Language to evaluate Message [MyFunction::info]:
Possible Issues (1)
LibraryFunctionLoad uses FindLibrary to locate libraries:
It is faster to find the library once with FindLibrary :
Tech Notes
Related Guides
Text
Wolfram Research (2010), LibraryFunctionLoad, Wolfram Language function, https://reference.wolfram.com/language/ref/LibraryFunctionLoad.html (updated 2014).
CMS
Wolfram Language. 2010. "LibraryFunctionLoad." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2014. https://reference.wolfram.com/language/ref/LibraryFunctionLoad.html.
APA
Wolfram Language. (2010). LibraryFunctionLoad. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/LibraryFunctionLoad.html
BibTeX
@misc{reference.wolfram_2025_libraryfunctionload, author="Wolfram Research", title="{LibraryFunctionLoad}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/LibraryFunctionLoad.html}", note=[Accessed: 17-November-2025]}
BibLaTeX
@online{reference.wolfram_2025_libraryfunctionload, organization={Wolfram Research}, title={LibraryFunctionLoad}, year={2014}, url={https://reference.wolfram.com/language/ref/LibraryFunctionLoad.html}, note=[Accessed: 17-November-2025]}