//go:linkname add
//go:nosplit
func add(p unsafe.Pointer, x uintptr) unsafe.Pointer {
	return unsafe.Pointer(uintptr(p) + x)
}

// getg returns the pointer to the current g.
// The compiler rewrites calls to this function into instructions
// that fetch the g directly (from TLS or from the dedicated register).
func getg() *g

// mcall switches from the g to the g0 stack and invokes fn(g),
// where g is the goroutine that made the call.

				} else if size&1 == 0 {
					align = 2
				} else {
					align = 1
				}
			}
			return persistentalloc(size, align, &memstats.other_sys)
		}

		if inittrace.active && inittrace.id == getg().goid {
			// Init functions are executed sequentially in a single goroutine.
			inittrace.allocs += 1
		}
	}

	// assistG is the G to charge for this allocation, or nil if

	// buffer flushes are rare. Record the lock edge even if it doesn't happen
	// this time.
	lockRankMayTraceFlush()

	// Check if we're already locked. If so, return an invalid traceLocker.
	if getg().m.trace.seqlock.Load()%2 == 1 {
		return traceLocker{}
	}
	return traceAcquireEnabled()
}

// ok returns true if the traceLocker is valid (i.e. tracing is enabled).
//

// from nanotime that we can use (some platforms have a really coarse system time granularity).
// We require some amount of time to pass to ensure that the conversion rate is fairly accurate
// in aggregate. But because we compute this rate lazily, there's a pretty good chance a decent
// amount of time has passed by the time we get here.
//

	libc_port_associate,
	libc_port_dissociate,
	libc_port_getn,
	libc_port_alert libcFunc
	netpollWakeSig atomic.Uint32 // used to avoid duplicate calls of netpollBreak
)

func errno() int32 {
	return *getg().m.perrno
}

func port_create() int32 {
	return int32(sysvicall0(&libc_port_create))
}

func port_associate(port, source int32, object uintptr, events uint32, user uintptr) int32 {

	}

	// Prevent preemption as we set up the space for a new object.
	//
	// Act like we're allocating.
	mp := acquirem()
	if mp.mallocing != 0 {
		throw("malloc deadlock")
	}
	if mp.gsignal == getg() {
		throw("malloc during signal")
	}
	mp.mallocing = 1

	var ptr unsafe.Pointer
	if !typ.Pointers() {
		// Allocate pointer-less objects from the tail end of the chunk.

	lock(&s.lock)
	if getg() != s.g {
		throw("tried to sleep scavenger from another goroutine")
	}

	if worked < minScavWorkTime {
		// This means there wasn't enough work to actually fill up minScavWorkTime.
		// That's fine; we shouldn't try to do anything with this information
		// because it's going result in a short enough sleep request that things
		// will get messy. Just assume we did at least this much work.

		}
		c.qcount++
		unlock(&c.lock)
		return true
	}

	if !block {
		unlock(&c.lock)
		return false
	}

	// Block on the channel. Some receiver will complete our operation for us.
	gp := getg()
	mysg := acquireSudog()
	mysg.releasetime = 0
	if t0 != 0 {
		mysg.releasetime = -1
	}
	// No stack splits between assigning elem and enqueuing mysg
	// on gp.waiting where copystack can find it.

	// is covered by idleTime, what we're left with is time spent in _Prunning and _Psyscall,
	// the latter of which is fine because the P will either go idle or get used for something
	// else via sysmon. Meanwhile if we subtract GC time from whatever's left, we get non-GC
	// _Prunning time. Note that this still leaves time spent in sweeping and in the scheduler,

type mSpanStateBox struct {
	s atomic.Uint8
}

// It is nosplit to match get, below.

//go:nosplit
func (b *mSpanStateBox) set(s mSpanState) {
	b.s.Store(uint8(s))
}

// It is nosplit because it's called indirectly by typedmemclr,
// which must not be preempted.

//go:nosplit
func (b *mSpanStateBox) get() mSpanState {
	return mSpanState(b.s.Load())
}