Module low

Expand description

A low-level wrapping of libffi, this layer makes no attempts at safety, but tries to provide a somewhat more idiomatic interface.

This module also re-exports types and constants necessary for using the library, so it should not be generally necessary to use the raw module. While this is a bit “Rustier” than raw, I’ve avoided drastic renaming in favor of hewing close to the libffi API. See middle for an easier-to-use approach.

Modules§

type_tag: Type tags used in constructing and inspecting ffi_types.
types: Re-exports the ffi_type objects used to describe the types of arguments and results.

Structs§

CodePtr: Wraps a function pointer of unknown type.
ffi_cif: A struct used by libffi to describe a function’s ABI and type signature.
ffi_closure: A struct used by libffi to describe and manage closures.
ffi_type: A struct used by libffi to describe types and their memory layout.

Enums§

Error: The two kinds of errors reported by libffi.

Constants§

ffi_abi_FFI_DEFAULT_ABI

Functions§

call^⚠: Calls a C function as specified by a CIF.
closure_alloc: Allocates a closure.
closure_free^⚠: Frees a closure.
prep_cif^⚠: Initalizes a CIF (Call Interface) with the given ABI and types.
prep_cif_var^⚠: Initalizes a CIF (Call Interface) for a varargs function.
prep_closure^⚠: Initializes a closure with a callback function and userdata.
prep_closure_mut^⚠: Initializes a mutable closure with a callback function and (mutable) userdata.

Type Aliases§

Callback: The type of function called by a closure.
CallbackMut: The type of function called by a mutable closure.
RawCallback: The callback type expected by raw::ffi_prep_closure_loc.
Result: The std::result::Result type specialized for libffi Errors.
ffi_abi: The type used to convey the ABI of a function.
ffi_arg: The smallest unsigned integer type returned by ffi_call.
ffi_sarg: The smallest signed integer type returned by ffi_call.
ffi_status: The return type of libffi’s functions that may return an error.