delete(e.paths, peExt.Path)
			}
		}
	}
	return nil
}

// Pending wraps port_getn(3c) and returns how many events are pending.
func (e *EventPort) Pending() (int, error) {
	var n uint32 = 0
	_, err := port_getn(e.port, nil, 0, &n, nil)
	return int(n), err
}

// Get wraps port_getn(3c) and fills a slice of PortEvent.
// It will block until either min events have been received

//go:cgo_import_dynamic libc_port_associate port_associate "libc.so"
//go:cgo_import_dynamic libc_port_dissociate port_dissociate "libc.so"
//go:cgo_import_dynamic libc_port_get port_get "libc.so"
//go:cgo_import_dynamic libc_port_getn port_getn "libc.so"
//go:cgo_import_dynamic libc_putmsg putmsg "libc.so"
//go:cgo_import_dynamic libc_getmsg getmsg "libc.so"

//go:linkname procpipe libc_pipe
//go:linkname procpipe2 libc_pipe2

Morten Siebuhr <******@****.***> 1455915197 +0100

		return
	}

	// Use port_alert to put portfd into alert mode.
	// This will wake up all threads sleeping in port_getn on portfd,
	// and cause their calls to port_getn to return immediately.
	// Further, until portfd is taken out of alert mode,
	// all calls to port_getn will return immediately.
	if port_alert(portfd, _PORT_ALERT_UPDATE, _POLLHUP, uintptr(unsafe.Pointer(&portfd))) < 0 {

Nathan Mittler <******@****.***> 1646353444 -0800

			line = line[:i]
		}
		f := getFields(line)
		if len(f) < 2 {
			continue
		}
		portnet := f[1] // "80/tcp"
		port, j, ok := dtoi(portnet)
		if !ok || port <= 0 || j >= len(portnet) || portnet[j] != '/' {
			continue
		}
		netw := portnet[j+1:] // "tcp"
		m, ok1 := services[netw]
		if !ok1 {
			m = make(map[string]int)
			services[netw] = m
		}

	if (ret) {
		fprintf(stderr, "runtime/cgo: mach_port_allocate failed for port_set: %d\n", ret);
		abort();
	}

	// Block all signals to the exception handler thread
	sigfillset(&ign);
	pthread_sigmask(SIG_SETMASK, &ign, &oset);

	// Start a thread to handle exceptions.
	uintptr_t port_set = (uintptr_t)mach_exception_handler_port_set;
	pthread_attr_init(&attr);

	portGen := newPortGenerators()
	for _, p := range c.Ports {
		if p.ServicePort > 0 {
			if portGen.Service.IsUsed(p.ServicePort) {
				return fmt.Errorf("failed configuring port %s: service port already used %d", p.Name, p.ServicePort)
			}
			portGen.Service.SetUsed(p.ServicePort)
		}
		if p.WorkloadPort > 0 {
			if portGen.Instance.IsUsed(p.WorkloadPort) {

	example.net/y v0.2.0 => ./y2
)
-- go.mod.postget --
module example.net/m

go 1.16

replace (
	example.net/x v0.1.0 => ./x1
	example.net/x v0.2.0-pre => ./x2-pre
	example.net/y v0.1.0 => ./y1
	example.net/y v0.2.0 => ./y2
)

require (
	example.net/x v0.1.0
	example.net/y v0.1.0 // indirect
)
-- go.mod.postget-117 --
module example.net/m

go 1.17

replace (

# tidy' treats "no package can be added" as a terminal state.

go get example.net/w@v0.2.0-pre example.net/x@v0.2.0-pre example.net/y@v0.2.0-pre example.net/z@v0.2.0-pre
go mod tidy -e
cmp go.mod go.mod.postget
go mod tidy -e
cmp go.mod go.mod.postget


# The 'tidy' logic for a lazy main module requires more iterations to converge,
# because it is willing to drop dependencies on non-root modules that do not