sec, nsec, _ = time_now()
	return
}

//go:nosplit
func cputicks() int64 {
	// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
	return nanotime()
}

// gsignalStack is unused on js.
type gsignalStack struct{}

const preemptMSupported = false

func preemptM(mp *m) {
	// No threads, so nothing to do.
}

        if (routePlanner.isCanceled()) throw IOException("Canceled")

        // Launch a new connection if we're ready to.
        val now = taskRunner.backend.nanoTime()
        var awaitTimeoutNanos = nextTcpConnectAtNanos - now
        var connectResult: ConnectResult? = null
        if (tcpConnectsInFlight.isEmpty() || awaitTimeoutNanos <= 0) {
          connectResult = launchTcpConnect()

			unlock(&cpuprof.lock)
			return
		}

		cpuprof.on = true
		cpuprof.log = newProfBuf(1, profBufWordCount, profBufTagCount)
		hdr := [1]uint64{uint64(hz)}
		cpuprof.log.write(nil, nanotime(), hdr[:], nil)
		setcpuprofilerate(int32(hz))
	} else if cpuprof.on {
		setcpuprofilerate(0)
		cpuprof.on = false
		cpuprof.addExtra()
		cpuprof.log.close()
	}
	unlock(&cpuprof.lock)
}

import (
	"errors"
	"sync"
	"syscall"
	"time"
	_ "unsafe" // for go:linkname
)

// runtimeNano returns the current value of the runtime clock in nanoseconds.
//
//go:linkname runtimeNano runtime.nanotime
func runtimeNano() int64

func runtime_pollServerInit()
func runtime_pollOpen(fd uintptr) (uintptr, int)
func runtime_pollClose(ctx uintptr)
func runtime_pollWait(ctx uintptr, mode int) int

	// No user calls from the system stack.
	if getg() != getg().m.curg {
		return debugCallSystemStack
	}
	if sp := getcallersp(); !(getg().stack.lo < sp && sp <= getg().stack.hi) {
		// Fast syscalls (nanotime) and racecall switch to the
		// g0 stack without switching g. We can't safely make
		// a call in this state. (We can't even safely
		// systemstack.)
		return debugCallSystemStack
	}

//go:nosplit
func semacreate(mp *m) {
}

//go:nosplit
func semasleep(ns int64) int32 {
	gp := getg()

	// Compute sleep deadline.
	var tsp *timespec
	if ns >= 0 {
		var ts timespec
		ts.setNsec(ns + nanotime())
		tsp = &ts
	}

	for {
		v := atomic.Load(&gp.m.waitsemacount)
		if v > 0 {
			if atomic.Cas(&gp.m.waitsemacount, v, v-1) {
				return 0 // semaphore acquired
			}
			continue
		}

func readTimeRandom(r []byte) {
	// Inspired by wyrand.
	// An earlier version of this code used getg().m.procid as well,
	// but note that this is called so early in startup that procid
	// is not initialized yet.
	v := uint64(nanotime())
	for len(r) > 0 {
		v ^= 0xa0761d6478bd642f
		v *= 0xe7037ed1a0b428db
		size := 8
		if len(r) < 8 {
			size = len(r)
		}
		for i := 0; i < size; i++ {
			r[i] ^= byte(v >> (8 * i))
		}

	case _CLOCK_REALTIME:
		abs = true
	default:
		return zeroBintime
	}
	return binuptime(abs)
}

func fallback_nanotime() int64
func fallback_walltime() (sec int64, nsec int32)

//go:nosplit
func nanotime1() int64 {
	bt := vdsoClockGettime(_CLOCK_MONOTONIC)
	if bt == zeroBintime {
		return fallback_nanotime()
	}
	return int64((1e9 * uint64(bt.sec)) + ((1e9 * uint64(bt.frac>>32)) >> 32))
}

func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) (p unsafe.Pointer, err int)

// munmap calls the munmap system call. It is implemented in assembly.
func munmap(addr unsafe.Pointer, n uintptr)

func nanotime1() int64

//go:noescape
func sigaltstack(new, old *stackt)

func fcntl(fd, cmd, arg int32) (ret int32, errno int32)

func walltime() (sec int64, nsec int32)

	var time timestamp
	if clock_time_get(clockRealtime, 0, unsafe.Pointer(&time)) != 0 {
		throw("clock_time_get failed")
	}
	return int64(time / 1000000000), int32(time % 1000000000)
}

func nanotime1() int64 {
	var time timestamp
	if clock_time_get(clockMonotonic, 0, unsafe.Pointer(&time)) != 0 {
		throw("clock_time_get failed")
	}
	return int64(time)