foreignSymbol -- get a foreign symbol

Synopsis

Usage:

foreignSymbol(lib, symb, T)

foreignSymbol(symb, T)
Inputs:
- lib, a shared library,
- symb, a string,
- T, a foreign type,
Outputs:
- a foreign object,

Description

This function is a wrapper around the C function dlsym. It loads a symbol from a shared library using the specified foreign type. If the shared library is already linked against Macaulay2, then it may be omitted.

i1 : foreignSymbol("errno", int)

o1 = 22

o1 : ForeignObject of type int32

Ways to use foreignSymbol:

foreignSymbol(SharedLibrary,String,ForeignType)
foreignSymbol(String,ForeignType)

For the programmer

The object foreignSymbol is a method function.