Function IOHIDGetAccelerationWithKey 

pub unsafe extern "C-unwind" fn IOHIDGetAccelerationWithKey(
    handle: io_connect_t,
    key: Option<&CFString>,
    acceleration: *mut c_double,
) -> kern_return_t

👎Deprecated

Available on crate features hidsystem and libc only.

Safety

• key might not allow None.
• acceleration must be a valid pointer.