Function mrb_fiber_resume 

pub unsafe extern "C" fn mrb_fiber_resume(
    mrb: *mut mrb_state,
    fib: mrb_value,
    argc: mrb_int,
    argv: *const mrb_value,
) -> mrb_value

Resume a Fiber

Implemented in mruby-fiber

Switches to the specified fiber and executes. Like the Fiber#resume method.

@note It can only be called before entering the mruby VM (e.g. in the main() function).