*
     * We start out with a double-precision approximation, which may be higher or lower than the
     * true value. Therefore, we perform at least one Newton iteration to get a guess that's
     * definitely >= floor(sqrt(x)), and then continue the iteration until we reach a fixed point.
     */
    BigInteger sqrt0;
    int log2 = log2(x, FLOOR);

func (c *Conn) SetWriteDeadline(t time.Time) error {
	return c.conn.SetWriteDeadline(t)
}

// NetConn returns the underlying connection that is wrapped by c.
// Note that writing to or reading from this connection directly will corrupt the
// TLS session.
func (c *Conn) NetConn() net.Conn {
	return c.conn
}

// A halfConn represents one direction of the record layer

		groupResource:       groupResource,
		waitingUntilFresh:   progressRequester,
	}
	metrics.WatchCacheCapacity.WithLabelValues(groupResource.String()).Set(float64(wc.capacity))
	wc.cond = sync.NewCond(wc.RLocker())
	wc.indexValidator = wc.isIndexValidLocked

	return wc
}

// Add takes runtime.Object as an argument.
func (w *watchCache) Add(obj interface{}) error {

		rr := make(nat, numWords)
		copy(rr, x)
		x = rr
	}

	// Ideally the precomputations would be performed outside, and reused
	// k0 = -m**-1 mod 2**_W. Algorithm from: Dumas, J.G. "On Newton–Raphson
	// Iteration for Multiplicative Inverses Modulo Prime Powers".
	k0 := 2 - m[0]
	t := m[0] - 1
	for i := 1; i < _W; i <<= 1 {
		t *= t
		k0 *= (t + 1)
	}
	k0 = -k0

		"einstein":   {Data: []byte("Albert\n")},
		"dir/newton": {Data: []byte("Sir Isaac\n")},
	}
	tmpDir = t.TempDir()
	if err := CopyFS(tmpDir, fsys); err != nil {
		t.Fatal("CopyFS:", err)
	}
	forceMFTUpdateOnWindows(t, tmpDir)
	tmpFsys = DirFS(tmpDir)
	if err := fstest.TestFS(tmpFsys, "william", "carl", "daVinci", "einstein", "dir/newton"); err != nil {
		t.Fatal("TestFS:", err)
	}

		wg.Add(1)
		go func() {
			defer wg.Done()
			mu.Lock()
			mu.Unlock()
		}()
	}
	wg.Wait()
}

func blockCond(t *testing.T) {
	var mu sync.Mutex
	c := sync.NewCond(&mu)
	mu.Lock()
	go func() {
		awaitBlockedGoroutine(t, "sync.Cond.Wait", "blockCond", 1)
		mu.Lock()
		c.Signal()
		mu.Unlock()
	}()
	c.Wait()
	mu.Unlock()
}

		t.http2transportTestHooks.newclientconn(cc)
		c = cc.tconn
	}
	if http2VerboseLogs {
		t.vlogf("http2: Transport creating client conn %p to %v", cc, c.RemoteAddr())
	}

	cc.cond = sync.NewCond(&cc.mu)
	cc.flow.add(int32(http2initialWindowSize))

	// TODO: adjust this writer size to account for frame size +
	// MTU + crypto/tls record padding.
	cc.bw = bufio.NewWriter(http2stickyErrWriter{