)

func testSimpleWriteLock(t *testing.T, duration time.Duration) (locked bool) {
	ctx := context.Background()
	lrwm := NewLRWMutex()

	if !lrwm.GetRLock(ctx, "", "object1", time.Second) {
		panic("Failed to acquire read lock")
	}
	// fmt.Println("1st read lock acquired, waiting...")

	if !lrwm.GetRLock(ctx, "", "object1", time.Second) {
		panic("Failed to acquire read lock")
	}

	"NAND",
	"NANDCC",
	"NEG",
	"NEGCC",
	"NEGVCC",
	"NEGV",
	"NOR",
	"NORCC",
	"OR",
	"ORCC",
	"ORN",
	"ORNCC",
	"ORIS",
	"REM",
	"REMU",
	"RFI",
	"RLWMI",
	"RLWMICC",
	"RLWNM",
	"RLWNMCC",
	"CLRLSLWI",
	"SLW",
	"SLWCC",
	"SRW",
	"SRAW",
	"SRAWCC",
	"SRWCC",
	"STBCCC",
	"STHCCC",
	"STSW",
	"STWCCC",
	"SUB",
	"SUBCC",
	"SUBVCC",

	if rl.Cur == rlimInf32 {
		rlim.Cur = rlimInf64
	} else {
		rlim.Cur = uint64(rl.Cur)
	}

	if rl.Max == rlimInf32 {
		rlim.Max = rlimInf64
	} else {
		rlim.Max = uint64(rl.Max)
	}
	return
}

//sysnb setrlimit1(resource int, rlim *rlimit32) (err error) = SYS_SETRLIMIT

func setrlimit(resource int, rlim *Rlimit) (err error) {
	err = prlimit(0, resource, rlim, nil)
	if err != ENOSYS {

	if errno != ENOSYS {
		return errno
	}

	rl := rlimit32{}
	if rlim.Cur == rlimInf64 {
		rl.Cur = rlimInf32
	} else if rlim.Cur < uint64(rlimInf32) {
		rl.Cur = uint32(rlim.Cur)
	} else {
		return EINVAL
	}
	if rlim.Max == rlimInf64 {
		rl.Max = rlimInf32
	} else if rlim.Max < uint64(rlimInf32) {
		rl.Max = uint32(rlim.Max)
	} else {
		return EINVAL
	}

func Getrlimit(resource int, rlim *Rlimit) error {
	err := prlimit(0, resource, nil, rlim)
	if err != ENOSYS {
		return err
	}
	return getrlimit(resource, rlim)
}

// setrlimit prefers the prlimit64 system call. See issue 38604.
func setrlimit(resource int, rlim *Rlimit) error {
	err := prlimit(0, resource, rlim, nil)
	if err != ENOSYS {
		return err
	}

		pad [32]uint32
	}
	b.RunParallel(func(pb *testing.PB) {
		var rwm PaddedRWMutex
		rwm.Init()
		for pb.Next() {
			rwm.RLock()
			rwm.RLock()
			rwm.RUnlock()
			rwm.RUnlock()
			rwm.Lock()
			rwm.Unlock()
		}
	})
}

func benchmarkRWMutex(b *testing.B, localWork, writeRatio int) {
	var rwm RWMutex
	rwm.Init()
	b.RunParallel(func(pb *testing.PB) {
		foo := 0
		for pb.Next() {

// there we will return a meaningful "too many open files" error.
func concurrentThreadsLimit() int {
	var rlim syscall.Rlimit
	if err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &rlim); err != nil {
		return 500
	}
	r := rlim.Cur
	if r > 500 {
		r = 500
	} else if r > 30 {
		r -= 30
	}
	return int(r)

		RWMutex
		pad [32]uint32
	}
	b.RunParallel(func(pb *testing.PB) {
		var rwm PaddedRWMutex
		for pb.Next() {
			rwm.RLock()
			rwm.RLock()
			rwm.RUnlock()
			rwm.RUnlock()
			rwm.Lock()
			rwm.Unlock()
		}
	})
}

func benchmarkRWMutex(b *testing.B, localWork, writeRatio int) {
	var rwm RWMutex
	b.RunParallel(func(pb *testing.PB) {
		foo := 0
		for pb.Next() {
			foo++

	i := 0

	// ppc64x: "RLWNM\t[$]16, R[0-9]+, [$]8, [$]15, R[0-9]+"
	a[i] = bits.RotateLeft32(a[i], 16) & 0xFF0000
	i++
	// ppc64x: "RLWNM\t[$]16, R[0-9]+, [$]8, [$]15, R[0-9]+"
	a[i] = bits.RotateLeft32(a[i]&0xFF, 16)
	i++
	// ppc64x: "RLWNM\t[$]4, R[0-9]+, [$]20, [$]27, R[0-9]+"
	a[i] = bits.RotateLeft32(a[i], 4) & 0xFF0
	i++
	// ppc64x: "RLWNM\t[$]16, R[0-9]+, [$]24, [$]31, R[0-9]+"

	Max uint32
}

//sysnb	getrlimit(resource int, rlim *rlimit32) (err error) = SYS_GETRLIMIT

func Getrlimit(resource int, rlim *Rlimit) (err error) {
	err = Prlimit(0, resource, nil, rlim)
	if err != ENOSYS {
		return err
	}

	rl := rlimit32{}
	err = getrlimit(resource, &rl)
	if err != nil {
		return
	}

	if rl.Cur == rlimInf32 {
		rlim.Cur = rlimInf64
	} else {
		rlim.Cur = uint64(rl.Cur)