func (b *AtomicFixedSizeRingBuf) Reset() {
	b.tex.Lock()
	defer b.tex.Unlock()

	b.Beg = 0
	b.readable = 0
	b.Use = 0
}
func (b *AtomicFixedSizeRingBuf) Reset() {
	b.tex.Lock()
	defer b.tex.Unlock()

	b.Beg = 0
	b.readable = 0
	b.Use = 0
}
// Reset quickly forgets any data stored in the ring buffer. The
// data is still there, but the ring buffer will ignore it and
// overwrite those buffers as new data comes in.