Function from_result

pub fn from_result<T, F>(f: F) -> T
where
    T: From<i16>,
    F: FnOnce() -> Result<T>,

Calls a closure returning a crate::error::Result<T> and converts the result to a C integer result.

This is useful when calling Rust functions that return crate::error::Result<T> from inside extern "C" functions that need to return an integer error result.

T should be convertible from an i16 via From<i16>.

Examples

unsafe extern "C" fn probe_callback(
    pdev: *mut bindings::platform_device,
) -> kernel::ffi::c_int {
    from_result(|| {
        let ptr = devm_alloc(pdev)?;
        bindings::platform_set_drvdata(pdev, ptr);
        Ok(0)
    })
}