type Cond struct {
	noCopy noCopy

	// L is held while observing or changing the condition
	L Locker

	notify  notifyList
	checker copyChecker
}

// NewCond returns a new Cond with Locker l.
func NewCond(l Locker) *Cond {
	return &Cond{L: l}
}

// Wait atomically unlocks c.L and suspends execution
// of the calling goroutine. After later resuming execution,

	"bytes"
	"context"
	"crypto/sha256"
	"encoding/hex"
	"errors"
	"fmt"
	"internal/poll"
	"io"
	"os"
	"runtime"
	"strconv"
	"sync"
	"testing"
	"time"
)

const (
	newton       = "../testdata/Isaac.Newton-Opticks.txt"
	newtonLen    = 567198
	newtonSHA256 = "d4a9ac22462b35e7821a4f2706c211093da678620a8f9997989ee7cf8d507bbd"
)

	return server, serverAddr
}

func TestRawConn(t *testing.T) {
	channels := []ChannelType{ReadWriteChannel, ReadWriteChannel, IgnoreChannel, ReadChannel, WriteChannel}
	conn := NewConn(NewDefaultChannelProtocols(channels))

	s, addr := newServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
		conn.Open(w, req)
	}))
	defer s.Close()

	panic("unreachable")
}

var (
	intZero     = constant.MakeInt64(0)
	floatZero   = constant.ToFloat(intZero)
	complexZero = constant.ToComplex(intZero)
)

// NewOne returns an OLITERAL representing 1 with the given type.
func NewOne(pos src.XPos, typ *types.Type) Node {
	var val constant.Value
	switch {
	case typ.IsInteger():
		val = intOne
	case typ.IsFloat():
		val = floatOne
	case typ.IsComplex():

	return ValAndOff(int64(val)<<32 + int64(uint32(off)))
}

func (x ValAndOff) canAdd32(off int32) bool {
	newoff := x.Off64() + int64(off)
	return newoff == int64(int32(newoff))
}
func (x ValAndOff) canAdd64(off int64) bool {
	newoff := x.Off64() + off
	return newoff == int64(int32(newoff))
}

func (x ValAndOff) addOffset32(off int32) ValAndOff {
	if !x.canAdd32(off) {

	pr := &conditionalProgressRequester{
		clock:                clock,
		requestWatchProgress: requestWatchProgress,
		contextMetadata:      contextMetadata,
	}
	pr.cond = sync.NewCond(&pr.mux)
	return pr
}

type WatchProgressRequester func(ctx context.Context) error

type TickerFactory interface {
	NewTimer(time.Duration) clock.Timer
}

		}
	}
}

func TestLargeXXHash(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping expensive test in short mode")
	}

	data, err := os.ReadFile("../../testdata/Isaac.Newton-Opticks.txt")
	if err != nil {
		t.Fatal(err)
	}

	var xh xxhash64
	xh.reset()
	i := 0
	for i < len(data) {
		// Write varying amounts to test buffering.
		c := i%4094 + 1
		if i+c > len(data) {

		case <-c2:
		}
	}()
	var mu sync.Mutex
	mu.Lock()
	go func() { // func7
		mu.Lock()
		mu.Unlock()
	}()
	var wg sync.WaitGroup
	wg.Add(1)
	go func() { // func8
		wg.Wait()
	}()
	cv := sync.NewCond(&sync.Mutex{})
	go func() { // func9
		cv.L.Lock()
		cv.Wait()
		cv.L.Unlock()
	}()
	ln, err := net.Listen("tcp", "127.0.0.1:0")
	if err != nil {
		log.Fatalf("failed to listen: %v", err)
	}

	p := &countingPromise{
		lock:          lock,
		cond:          *sync.NewCond(lock),
		activeCounter: activeCounter,
		isSet:         initial != nil,
		value:         initial,
	}
	if doneCh != nil {
		activeCounter.Add(1) // count start of the following goroutine
		go func() {

	}

	// new cbrt to 23 bits
	r := t * t / x
	s := C + r*t
	t *= G + F/(s+E+D/s)

	// chop to 22 bits, make larger than cbrt(x)
	t = Float64frombits(Float64bits(t)&(0xFFFFFFFFC<<28) + 1<<30)

	// one step newton iteration to 53 bits with error less than 0.667ulps
	s = t * t // t*t is exact
	r = x / s
	w := t + t
	r = (r - t) / (w + r) // r-s is exact
	t = t + t*r

	// restore the sign bit
	if sign {
		t = -t
	}