FFI::cdef

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FFI::cdef — Creates a new FFI object

Опис

public static FFI::cdef(string $code = "", ?string $lib = null): FFI

Creates a new FFI object.

Параметри

code: A string containing a sequence of declarations in regular C language (types, structures, functions, variables, etc). Actually, this string may be copy-pasted from C header files.

Зауваження:
C preprocessor directives are not supported, i.e. #include, #define and CPP macros do not work.
lib: The name of a shared library file, to be loaded and linked with the definitions.

Зауваження:
If lib is omitted or null, platforms supporting RTLD_DEFAULT attempt to lookup symbols declared in code in the normal global scope. Other systems will fail to resolve these symbols.

Значення, що повертаються

Returns the freshly created FFI object.

Журнал змін

Версія	Опис
8.0.0	`lib` is nullable now.

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User Contributed Notes 1 note

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derrekbertrand at gmail dot com ¶

4 years ago

You'll probably want to add a C header file, but as of the current version preprocessor directives do not work... so what do? On systems with GCC run the file through this command:

cpp -P /usr/include/unprocessedheader.h -o myprettyheader.h

Note that because preprocessing is not suppored in FFI, C/C++ macros are not supported either. You'll probably still have to write a small wrapper in C unless your library has an exceedingly simple public API.

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