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ffi_prep_cif_var(3) | Library Functions Manual | ffi_prep_cif_var(3) |
NAME¶
ffi_prep_cif_var
—
Prepare a
ffi_cif
structure for use with ffi_call
for
variadic functions.SYNOPSIS¶
#include
<ffi.h>
ffi_status
ffi_prep_cif_var
(ffi_cif
*cif, ffi_abi abi,
unsigned int nfixedargs,
unsigned int ntotalargs,
ffi_type *rtype,
ffi_type **atypes);
DESCRIPTION¶
Theffi_prep_cif_var
function prepares a
ffi_cif
structure for use with
ffi_call
for variadic functions.
abi specifies a set of calling conventions to
use. atypes is an array of
ntotalargs pointers to
ffi_type
structs that describe the data
type, size and alignment of each argument.
rtype points to an
ffi_type
that describes the data type, size
and alignment of the return value. nfixedargs
must contain the number of fixed (non-variadic) arguments. Note that to call a
non-variadic function ffi_prep_cif
must be
used.
RETURN VALUES¶
Upon successful completion,ffi_prep_cif_var
returns FFI_OK
. It will return
FFI_BAD_TYPEDEF
if
cif is
NULL
or
atypes or
rtype is malformed. If
abi does not refer to a valid ABI,
FFI_BAD_ABI
will be returned. Available
ABIs are defined in <ffitarget.h>
SEE ALSO¶
ffi(3), ffi_call(3), ffi_prep_cif(3)January 25, 2011 |