Trait ffi_utils::callback::Callback

pub trait Callback {
    type Args: CallbackArgs;
    fn call(&self, user_data: *mut c_void, error: FfiResult, args: Self::Args);
}

This trait allows us to treat callbacks with different number and type of arguments uniformly.

Associated Types

type Args: CallbackArgs

Arguments for the callback. Should be a tuple.

Required Methods

fn call(&self, user_data: *mut c_void, error: FfiResult, args: Self::Args)

Call the callback, passing the user data pointer, error code and any additional arguments.

Implementors

• impl Callback for extern "C" fn(_: *mut c_void, _: FfiResult) type Args = ();
• impl<T: CallbackArgs> Callback for extern "C" fn(_: *mut c_void, _: FfiResult, _: T) type Args = T;
• impl<T: CallbackArgs> Callback for unsafe extern "C" fn(_: *mut c_void, _: FfiResult, _: T) type Args = T;
• impl<T0: CallbackArgs, T1: CallbackArgs> Callback for extern "C" fn(_: *mut c_void, _: FfiResult, _: T0, _: T1) type Args = (T0, T1);
• impl<T0: CallbackArgs, T1: CallbackArgs, T2: CallbackArgs> Callback for extern "C" fn(_: *mut c_void, _: FfiResult, _: T0, _: T1, _: T2) type Args = (T0, T1, T2);