"math"
	"math/bits"
)

// Mask allows filtering by a bitset mask.
type Mask uint64

const (
	// MaskAll is the mask for all entries.
	MaskAll Mask = math.MaxUint64
)

// MaskFromMaskable extracts mask from an interface.
func MaskFromMaskable(m Maskable) Mask {
	return Mask(m.Mask())
}

// Contains returns whether *all* flags in other is present in t.
func (t Mask) Contains(other Mask) bool {
	return t&other == other

		},
		{
			name:    "Mask 11 AND mask 10",
			masks:   [][]int{{0, 1}, {1}},
			andMask: "10",
		},
		{
			name:    "Mask 01 AND mask 11",
			masks:   [][]int{{0}, {0, 1}},
			andMask: "01",
		},
		{
			name:    "Mask 11 AND mask 11 AND mask 10",
			masks:   [][]int{{0, 1}, {0, 1}, {1}},
			andMask: "10",
		},
		{
			name:    "Mask 01 AND mask 01 AND mask 10 AND mask 11",

// lower-numbered bits set wins out.
func (s *bitMask) IsNarrowerThan(mask BitMask) bool {
	if s.Count() == mask.Count() {
		return s.IsLessThan(mask)
	}
	return s.Count() < mask.Count()
}

// IsLessThan checks which bitmask has more lower-numbered bits set.
func (s *bitMask) IsLessThan(mask BitMask) bool {
	return *s < *mask.(*bitMask)
}

	sub := &Sub[T]{ch: subCh, types: Mask(mask.Mask()), filter: filter}
	ps.subs = append(ps.subs, sub)

	// We hold a lock, so we are safe to update
	combined := Mask(atomic.LoadUint64(&ps.types))
	combined.Merge(Mask(mask.Mask()))
	atomic.StoreUint64(&ps.types, uint64(combined))

	go func() {
		<-doneCh

		ps.Lock()
		defer ps.Unlock()
		var remainTypes Mask
		for i, s := range ps.subs {
			if s == sub {

//go:nosplit
//go:nowritebarrierrec
func sigaddset(mask *sigset, i int) {
	(*mask)[(i-1)/32] |= 1 << ((uint32(i) - 1) & 31)
}

func sigdelset(mask *sigset, i int) {
	(*mask)[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
}

//go:nosplit
func sigfillset(mask *[4]uint32) {
	(*mask)[0], (*mask)[1], (*mask)[2], (*mask)[3] = ^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)

	clusterCIDR *net.IPNet
	// clusterMaskSize is the mask size, in bits, assigned to the cluster
	// caches the mask size to avoid the penalty of calling clusterCIDR.Mask.Size()
	clusterMaskSize int
	// nodeMask is the network mask assigned to the nodes
	nodeMask net.IPMask
	// nodeMaskSize is the mask size, in bits,assigned to the nodes
	// caches the mask size to avoid the penalty of calling nodeMask.Size()
	nodeMaskSize int

  static int getHashPrefix(int value, int mask) {
    return value & ~mask;
  }

  /** Returns the index, or 0 if the entry is "null". */
  static int getNext(int entry, int mask) {
    return entry & mask;
  }

  /** Returns a new value combining the prefix and suffix using the given mask. */
  static int maskCombine(int prefix, int suffix, int mask) {
    return (prefix & ~mask) | (suffix & mask);
  }

  static int remove(

#include <time.h>
#include <unistd.h>

extern void IntoGoAndBack();

int CheckBlocked() {
	sigset_t mask;
	sigprocmask(SIG_BLOCK, NULL, &mask);
	return sigismember(&mask, SIGIO);
}

static void* sigthreadfunc(void* unused) {
	sigset_t mask;
	sigemptyset(&mask);
	sigaddset(&mask, SIGIO);
	sigprocmask(SIG_BLOCK, &mask, NULL);
	IntoGoAndBack();
	return NULL;
}

int RunSigThread() {
	int tries;
	pthread_t thread;

//go:nosplit
//go:nowritebarrierrec
func sigaddset(mask *sigset, i int) {
	(*mask)[(i-1)/64] |= 1 << ((uint32(i) - 1) & 63)
}

func sigdelset(mask *sigset, i int) {
	(*mask)[(i-1)/64] &^= 1 << ((uint32(i) - 1) & 63)
}

//go:nosplit
func sigfillset(mask *[2]uint64) {
	(*mask)[0], (*mask)[1] = ^uint64(0), ^uint64(0)

// {"Flags":0,"ParamFlags":[96,0],"ResultFlags":null}
// callsite: calls.go:103:9|0 flagstr "" flagval 0 score 2 mask 0 maskstr ""
// callsite: calls.go:112:9|1 flagstr "" flagval 0 score 2 mask 0 maskstr ""
// callsite: calls.go:115:9|2 flagstr "" flagval 0 score 2 mask 0 maskstr ""
// callsite: calls.go:119:12|3 flagstr "CallSiteOnPanicPath" flagval 2 score 102 mask 1 maskstr "panicPathAdj"
// <endcallsites>
// <endfuncpreamble>