Function spawn 

pub unsafe fn spawn(
    name: *const c_char,
    entry: extern "C" fn(*mut c_void) -> i32,
    arg: *mut c_void,
) -> Result<ThreadPtr, Status>

Spawns a new kernel thread with default priority and resumes it.

Safety

The caller must ensure that entry and arg are safe to run on a new thread, and that the thread is joined before any borrowed data in arg is destroyed.