// the stack is safe to reclaim.
//
//go:noescape
func exitThread(wait *atomic.Uint32)

//go:noescape
func obsdsigprocmask(how int32, new sigset) sigset

//go:nosplit
//go:nowritebarrierrec
func sigprocmask(how int32, new, old *sigset) {
	n := sigset(0)
	if new != nil {
		n = *new
	}
	r := obsdsigprocmask(how, n)
	if old != nil {
		*old = r
	}
}

	osyield()
}

type sigset struct{}

// Called to initialize a new m (including the bootstrap m).
// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
func mpreinit(mp *m) {
	mp.gsignal = malg(32 * 1024)
	mp.gsignal.m = mp
}

//go:nosplit
func usleep_no_g(usec uint32) {
	usleep(usec)
}

//go:nosplit
func sigsave(p *sigset) {
}

//go:nosplit

	prio  uint16
}

type lwpparams struct {
	start_func uintptr
	arg        unsafe.Pointer
	stack      uintptr
	tid1       unsafe.Pointer // *int32
	tid2       unsafe.Pointer // *int32
}

type sigset struct {
	__bits [4]uint32
}

type stackt struct {
	ss_sp     uintptr
	ss_size   uintptr
	ss_flags  int32
	pad_cgo_0 [4]byte
}

type siginfo struct {
	si_signo  int32

	_EWOULDBLOCK = _EAGAIN
	_ENOTSUP     = 91

	// From OpenBSD's sys/time.h
	_CLOCK_REALTIME  = 0
	_CLOCK_VIRTUAL   = 1
	_CLOCK_PROF      = 2
	_CLOCK_MONOTONIC = 3
)

type sigset uint32

var sigset_all = ^sigset(0)

// From OpenBSD's <sys/sysctl.h>
const (
	_CTL_HW        = 6
	_HW_NCPU       = 3
	_HW_PAGESIZE   = 7
	_HW_NCPUONLINE = 25
)

func sysctlInt(mib []uint32) (int32, bool) {

//go:nosplit
func setSignalstackSP(s *stackt, sp uintptr) {
	*(*uintptr)(unsafe.Pointer(&s.ss_sp)) = sp
}

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

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

//go:nosplit
func (c *sigctxt) fixsigcode(sig uint32) {
}

//
//go:nosplit
func setSignalstackSP(s *stackt, sp uintptr) {
	s.ss_sp = sp
}

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

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

//go:nosplit
func (c *sigctxt) fixsigcode(sig uint32) {
}

	_EV_CLEAR     = 0x20
	_EV_RECEIPT   = 0
	_EV_ERROR     = 0x4000
	_EV_EOF       = 0x8000
	_EVFILT_READ  = 0x0
	_EVFILT_WRITE = 0x1
	_EVFILT_USER  = 0x8

	_NOTE_TRIGGER = 0x1000000
)

type sigset struct {
	__bits [4]uint32
}

type siginfo struct {
	_signo  int32
	_code   int32
	_errno  int32
	_reason [20]byte
}

type stackt struct {
	ss_sp    uintptr
	ss_size  uintptr

	_EV_CLEAR     = 0x20
	_EV_RECEIPT   = 0
	_EV_ERROR     = 0x4000
	_EV_EOF       = 0x8000
	_EVFILT_READ  = 0x0
	_EVFILT_WRITE = 0x1
	_EVFILT_USER  = 0x8

	_NOTE_TRIGGER = 0x1000000
)

type sigset struct {
	__bits [4]uint32
}

type siginfo struct {
	_signo  int32
	_code   int32
	_errno  int32
	_pad    int32
	_reason [24]byte
}

type stackt struct {
	ss_sp     uintptr

	_EV_CLEAR     = 0x20
	_EV_RECEIPT   = 0
	_EV_ERROR     = 0x4000
	_EV_EOF       = 0x8000
	_EVFILT_READ  = 0x0
	_EVFILT_WRITE = 0x1
	_EVFILT_USER  = 0x8

	_NOTE_TRIGGER = 0x1000000
)

type sigset struct {
	__bits [4]uint32
}

type siginfo struct {
	_signo   int32
	_code    int32
	_errno   int32
	_reason  uintptr
	_reasonx [16]byte
}

type stackt struct {
	ss_sp    uintptr

	_EV_CLEAR     = 0x20
	_EV_RECEIPT   = 0
	_EV_ERROR     = 0x4000
	_EV_EOF       = 0x8000
	_EVFILT_READ  = 0x0
	_EVFILT_WRITE = 0x1
	_EVFILT_USER  = 0x8

	_NOTE_TRIGGER = 0x1000000
)

type sigset struct {
	__bits [4]uint32
}

type siginfo struct {
	_signo   int32
	_code    int32
	_errno   int32
	_reason  uintptr
	_reasonx [16]byte
}

type stackt struct {
	ss_sp    uintptr