libffi.info: Structures

Types

Type Example

Primitive Types

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2.3.2 Structures
----------------

Although 'libffi' has no special support for unions or bit-fields, it is
perfectly happy passing structures back and forth.  You must first
describe the structure to 'libffi' by creating a new 'ffi_type' object
for it.

 -- Data type: ffi_type
     The 'ffi_type' has the following members:
     'size_t size'
          This is set by 'libffi'; you should initialize it to zero.

     'unsigned short alignment'
          This is set by 'libffi'; you should initialize it to zero.

     'unsigned short type'
          For a structure, this should be set to 'FFI_TYPE_STRUCT'.

     'ffi_type **elements'
          This is a 'NULL'-terminated array of pointers to 'ffi_type'
          objects.  There is one element per field of the struct.