}
		blockb := bufio.NewWriter(blockf)
		if err := BuildProfile(records).Write(blockb); err != nil {
			http.Error(w, fmt.Sprintf("failed to write profile: %v", err), http.StatusInternalServerError)
			return
		}
		if err := blockb.Flush(); err != nil {
			http.Error(w, fmt.Sprintf("failed to flush temp file: %v", err), http.StatusInternalServerError)
			return
		}
		if err := blockf.Close(); err != nil {

	}
}

// netpoll checks for ready network connections.
// Returns list of goroutines that become runnable.
// delay < 0: blocks indefinitely
// delay == 0: does not block, just polls
// delay > 0: block for up to that many nanoseconds
func netpoll(delay int64) (gList, int32) {
	if iocphandle == _INVALID_HANDLE_VALUE {
		return gList{}, 0
	}

	var entries [64]overlappedEntry

func (rw *rwmutex) unlock() {
	// Announce to readers that there is no active writer.
	r := rw.readerCount.Add(rwmutexMaxReaders)
	if r >= rwmutexMaxReaders {
		throw("unlock of unlocked rwmutex")
	}
	// Unblock blocked readers.
	lock(&rw.rLock)
	for rw.readers.ptr() != nil {
		reader := rw.readers.ptr()
		rw.readers = reader.schedlink
		reader.schedlink.set(nil)
		notewakeup(&reader.park)
		r -= 1
	}

		bid := q[n].bid
		cid := q[n].cid
		q = q[:n]

		// Add block to tour.
		blocks[bid].pos = int32(len(tour))
		tour = append(tour, bid)

		// Proceed down next child edge (if any).
		if cid == 0 {
			// This is our first visit to b. Set its depth.
			blocks[bid].depth = blocks[blocks[bid].parent].depth + 1
			// Then explore its first child.
			cid = blocks[bid].firstChild
		} else {

	// returned when “the lock is blocked by a lock from another process”.
	// If that process is blocked on some lock that we are holding, then the
	// resulting livelock is due to a real deadlock (and would manifest as such
	// when using, for example, the flock implementation of this package).
	// If the other process is *not* blocked on some other lock that we are

	for i, b := range f.Blocks {
		idToIdx[b.ID] = i
	}

	// Set of blocks we're moving, by ID.
	move := map[ID]struct{}{}

	// Map from block ID to the moving blocks that should
	// come right after it.
	after := map[ID][]*Block{}

	// Check each loop header and decide if we want to move it.
	for _, loop := range loopnest.loops {
		b := loop.header
		var p *Block // b's in-loop predecessor

				d.progCoeffs[compIndex] = make([]block, mxx*myy*d.comp[compIndex].h*d.comp[compIndex].v)
			}
		}
	}

	d.bits = bits{}
	mcu, expectedRST := 0, uint8(rst0Marker)
	var (
		// b is the decoded coefficients, in natural (not zig-zag) order.
		b  block
		dc [maxComponents]int32
		// bx and by are the location of the current block, in units of 8x8
		// blocks: the third block in the first row has (bx, by) = (2, 0).

	// system. But also fallback in case of any error with MPTCP.
	//
	// Possible MPTCP specific error: ENOPROTOOPT (sysctl net.mptcp.enabled=0)
	// But just in case MPTCP is blocked differently (SELinux, etc.), just
	// retry with "plain" TCP.
	return sd.dialTCP(ctx, laddr, raddr)
}

func (sl *sysListener) listenMPTCP(ctx context.Context, laddr *TCPAddr) (*TCPListener, error) {

		return syscall.Environ(), nil
	}
	var blockp *uint16
	err = windows.CreateEnvironmentBlock(&blockp, sys.Token, false)
	if err != nil {
		return nil, err
	}
	defer windows.DestroyEnvironmentBlock(blockp)

	const size = unsafe.Sizeof(*blockp)
	for *blockp != 0 { // environment block ends with empty string
		// find NUL terminator
		end := unsafe.Add(unsafe.Pointer(blockp), size)
		for *(*uint16)(end) != 0 {

		// is safe.
		if ii.combinesBackward() {
			cccB := b[k-1].ccc
			cccC := ii.ccc
			blocked := false // b[i] blocked by starter or greater or equal CCC?
			if cccB == 0 {
				s = k - 1
			} else {
				blocked = s != k-1 && cccB >= cccC
			}
			if !blocked {
				combined := combine(rb.runeAt(s), rb.runeAt(i))
				if combined != 0 {
					rb.assignRune(s, combined)
					continue