文件操作 - ffi_prep_cif.3

文件: /opt/puppetlabs/puppet/lib/ruby/gems/3.2.0/gems/ffi-1.16.3/ext/ffi_c/libffi/man/ffi_prep_cif.3

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.Dd February 15, 2008
.Dt ffi_prep_cif 3
.Sh NAME
.Nm ffi_prep_cif
.Nd Prepare a
.Nm ffi_cif
structure for use with
.Nm ffi_call 
.
.Sh SYNOPSIS
.In ffi.h
.Ft ffi_status
.Fo ffi_prep_cif
.Fa "ffi_cif *cif"
.Fa "ffi_abi abi"
.Fa "unsigned int nargs"
.Fa "ffi_type *rtype"
.Fa "ffi_type **atypes"
.Fc
.Sh DESCRIPTION
The
.Nm ffi_prep_cif
function prepares a
.Nm ffi_cif
structure for use with 
.Nm ffi_call
.
.Fa abi
specifies a set of calling conventions to use.
.Fa atypes
is an array of
.Fa nargs
pointers to
.Nm ffi_type
structs that describe the data type, size and alignment of each argument.
.Fa rtype
points to an
.Nm ffi_type
that describes the data type, size and alignment of the
return value. Note that to call a variadic function
.Nm ffi_prep_cif_var
must be used instead.
.Sh RETURN VALUES
Upon successful completion,
.Nm ffi_prep_cif
returns
.Nm FFI_OK .
It will return
.Nm FFI_BAD_TYPEDEF
if
.Fa cif
is
.Nm NULL
or
.Fa atypes
or
.Fa rtype
is malformed. If
.Fa abi
does not refer to a valid ABI,
.Nm FFI_BAD_ABI
will be returned. Available ABIs are
defined in
.Nm <ffitarget.h> .
.Sh SEE ALSO
.Xr ffi 3 ,
.Xr ffi_call 3 ,
.Xr ffi_prep_cif_var 3

文件操作 - ffi_prep_cif.3

文件: /opt/puppetlabs/puppet/lib/ruby/gems/3.2.0/gems/ffi-1.16.3/ext/ffi_c/libffi/man/ffi_prep_cif.3

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