//      MAXLOG = 8.8029691931113054295988e+01 = log(2**127)
//      MINLOG = -8.872283911167299960540e+01 = log(2**-128)
//
// A rational function is used for |x| < 0.625.  The form
// x + x**3 P(x)/Q(x) of Cody & Waite is employed.
// Otherwise,
//      tanh(x) = sinh(x)/cosh(x) = 1  -  2/(exp(2x) + 1).
//
// ACCURACY:
//
//                      Relative error:
// arithmetic   domain     # trials      peak         rms

 	- the HTTP Server stops listening immediately
	- any new request arriving on a new TCP socket is denied with
      a network error similar to 'connection refused'
    - the HTTP Server waits gracefully for existing requests to complete
      up to '60s' (dictated by ShutdownTimeout)
	- active long running requests will receive a GOAWAY.

T0+70s: HTTPServerStoppedListening:

// WaitString a constant for specifying the wait flag
const WaitString = "-w"

// WaitSecondsValue a constant for specifying the default wait seconds
const WaitSecondsValue = "5"

// WaitIntervalString a constant for specifying the wait interval flag
const WaitIntervalString = "-W"

// WaitIntervalUsecondsValue a constant for specifying the default wait interval useconds
const WaitIntervalUsecondsValue = "100000"

	wg sync.WaitGroup
	// Once Wait is initiated, all consecutive Done invocation will be
	// rate limited using this rate limiter.
	limiter RateLimiter
	stopCtx context.Context

	mu sync.Mutex
	// wait indicate whether Wait is called, if true,
	// then any Add with positive delta will return error.
	wait bool
	// number of request(s) currently using the wait group
	count int
}

	SYS_OPEN  = 5 // { int open(char *path, int flags, int mode); }
	SYS_CLOSE = 6 // { int close(int fd); }
	SYS_WAIT4 = 7 // { int wait4(int pid, int *status, int options, struct rusage *rusage); } wait4 wait_args int
	// SYS_NOSYS = 8;  // { int nosys(void); } __nosys nosys_args int
	SYS_LINK                   = 9   // { int link(char *path, char *link); }

			target.Add(1)
		}()
	}
	wg.Wait()

	waitingCh := make(chan struct{})
	wg.Add(n)
	for i := 0; i < n; i++ {
		go func() {
			defer wg.Done()

			<-waitingCh
			target.Done()
		}()
	}
	defer wg.Wait()

	now := time.Now()
	t.Logf("Wait starting, N=%d, grace: %s, at: %s", n, grace, now)

  /**
   * Asserts that a prior call that had caused this thread to block or wait has since returned
   * normally.
   */
  public void assertPriorCallReturns(@Nullable String methodName) throws Exception {
    assertEquals(null, getResponse(methodName).getResult());
  }

  /**
   * Asserts that a prior call that had caused this thread to block or wait has since returned the
   * expected boolean value.
   */

	defer wg.mu.RUnlock()
	if wg.wait && delta > 0 {
		return fmt.Errorf("add with positive delta after Wait is forbidden")
	}
	wg.wg.Add(delta)
	return nil
}

// Done decrements the WaitGroup counter.
func (wg *SafeWaitGroup) Done() {
	wg.wg.Done()
}

// Wait blocks until the WaitGroup counter is zero.
func (wg *SafeWaitGroup) Wait() {
	wg.mu.Lock()
	wg.wait = true
	wg.mu.Unlock()
	wg.wg.Wait()

        and:
        // command the gate keeper to open the gate and shutdown
        command.releaseAll()
        server.expect(server.get("command").send("stop"))
        then:
        // waits for build to start and finish
        buildTriggeredAndSucceeded()
        // Change has been incorporated
        outputFile.text == "changed"
    }

func (c *EndpointSliceConfig) RegisterEventHandler(handler EndpointSliceHandler) {
	c.eventHandlers = append(c.eventHandlers, handler)
}

// Run waits for cache synced and invokes handlers after syncing.
func (c *EndpointSliceConfig) Run(stopCh <-chan struct{}) {
	c.logger.Info("Starting endpoint slice config controller")