func (b *AtomicFixedSizeRingBuf) Readable() int {
	b.tex.Lock()
	defer b.tex.Unlock()
	return b.readable
}
func (b *AtomicFixedSizeRingBuf) Readable() int {
	b.tex.Lock()
	defer b.tex.Unlock()
	return b.readable
}
func ( b * AtomicFixedSizeRingBuf ) Readable ( ) int { b . tex . Lock ( ) defer b . tex . Unlock ( ) return b . readable }
// Readable() returns the number of bytes available for reading.
Readable () returns the number of bytes available for reading .