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instance method
Fiber::Scheduler#kernel_sleep
kernel_sleep(duration = nil)
scheduler.c
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VALUE
rb_fiber_scheduler_kernel_sleep(VALUE scheduler, VALUE timeout)
{
return rb_funcall(scheduler, id_kernel_sleep, 1, timeout);
}
Invoked by Kernel#sleep and Mutex#sleep and is expected to provide an implementation of sleeping in a non-blocking way. Implementation might register the current fiber in some list of “which fiber wait until what moment”, call Fiber.yield to pass control, and then in close resume the fibers whose wait period has elapsed.