//go:linkname syscall_prlimit syscall.prlimit
func syscall_prlimit(pid, resource int, newlimit, old *syscall.Rlimit) error

func Prlimit(pid, resource int, newlimit, old *Rlimit) error {
	// Just call the syscall version, because as of Go 1.21
	// it will affect starting a new process.
	return syscall_prlimit(pid, resource, (*syscall.Rlimit)(newlimit), (*syscall.Rlimit)(old))
}

func enter_Prlimit(pid int, resource int, newlimit *Rlimit, old *Rlimit) (err error) {
	funcref := get_PrlimitAddr()
	if funcptrtest(GetZosLibVec()+SYS_PRLIMIT<<4, "") == 0 {
		*funcref = impl_Prlimit
	} else {
		*funcref = error_Prlimit
	}
	return (*funcref)(pid, resource, newlimit, old)
}

func error_Prlimit(pid int, resource int, newlimit *Rlimit, old *Rlimit) (err error) {
	err = ENOSYS
	return
}

//sys	Pwrite(fd int, p []byte, offset int64) (n int, err error)
//sys	Prctl(option int, arg2 uintptr, arg3 uintptr, arg4 uintptr, arg5 uintptr) (err error) = SYS___PRCTL_A
//sysnb	Prlimit(pid int, resource int, newlimit *Rlimit, old *Rlimit) (err error) = SYS_PRLIMIT
//sys	Rename(from string, to string) (err error) = SYS___RENAME_A
//sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error) = SYS___RENAMEAT_A

				}
			}
		}
	}
	if rlimit := summary.Node.Rlimit; rlimit != nil {
		if rlimit.NumOfRunningProcesses != nil && rlimit.MaxPID != nil {
			available := int64(*rlimit.MaxPID) - int64(*rlimit.NumOfRunningProcesses)
			result[evictionapi.SignalPIDAvailable] = signalObservation{
				available: resource.NewQuantity(available, resource.DecimalSI),
				capacity:  resource.NewQuantity(int64(*rlimit.MaxPID), resource.DecimalSI),

		// If updating memory limit, use most recently configured CPU request and limit values.
		// If updating CPU request and limit, use most recently configured memory request and limit values.
		switch resourceName {
		case v1.ResourceMemory:
			container.Resources.Limits = v1.ResourceList{
				v1.ResourceCPU:    *resource.NewMilliQuantity(cInfo.currentContainerResources.cpuLimit, resource.DecimalSI),

								kubeContainerID: kcs.ID,
								desiredContainerResources: containerResources{
									memoryLimit: mem100M.Value(),
									cpuLimit:    cpu100m.MilliValue(),
								},
								currentContainerResources: &containerResources{
									memoryLimit: mem200M.Value(),
									cpuLimit:    cpu200m.MilliValue(),
								},
							},
						},
						v1.ResourceCPU: {
							{
								apiContainerIdx: 1,

		}

		// Check if we've exceeded the limit with the last update.
		if tp.addr >= limit {
			return typePointers{}, 0
		}

		// Grab more bits and try again.
		tp.mask = readUintptr(addb(tp.typ.GCData, (tp.addr-tp.elem)/goarch.PtrSize/8))
		if tp.addr+goarch.PtrSize*ptrBits > limit {
			bits := (tp.addr + goarch.PtrSize*ptrBits - limit) / goarch.PtrSize
			tp.mask &^= ((1 << (bits)) - 1) << (ptrBits - bits)

	p pair
	r relation
}

// a limit records known upper and lower bounds for a value.
type limit struct {
	min, max   int64  // min <= value <= max, signed
	umin, umax uint64 // umin <= value <= umax, unsigned
}

func (l limit) String() string {
	return fmt.Sprintf("sm,SM,um,UM=%d,%d,%d,%d", l.min, l.max, l.umin, l.umax)
}

func (l limit) intersect(l2 limit) limit {
	if l.min < l2.min {
		l.min = l2.min

	// reduceExtraPercent represents the amount of memory under the limit
	// that the scavenger should target. For example, 5 means we target 95%
	// of the limit.
	//
	// The purpose of shooting lower than the limit is to ensure that, once
	// close to the limit, the scavenger is working hard to maintain it. If
	// we have a memory limit set but are far away from it, there's no harm

			reqWaitLimitExpected:  5 * time.Second, // from now
		},
		{
			name: "context has a deadline, wait limit should not exceed the hard limit of 1m",
			parent: func(now time.Time) (context.Context, context.CancelFunc) {
				// let 1/4th of the remaining deadline exceed the hard limit
				return context.WithDeadline(context.Background(), now.Add(8*time.Minute))
			},
			newReqWaitCtxExpected: true,