//go:noescape
func thrsleep(ident uintptr, clock_id int32, tsp *timespec, lock uintptr, abort *uint32) int32

//go:noescape
func thrwakeup(ident uintptr, n int32) int32

func osyield()

//go:nosplit
func osyield_no_g() {
	osyield()

}
func thrwakeup_trampoline()

//go:nosplit
func osyield() {
	libcCall(unsafe.Pointer(abi.FuncPCABI0(sched_yield_trampoline)), unsafe.Pointer(nil))
}
func sched_yield_trampoline()

//go:nosplit
func osyield_no_g() {
	asmcgocall_no_g(unsafe.Pointer(abi.FuncPCABI0(sched_yield_trampoline)), unsafe.Pointer(nil))
}

//go:cgo_import_dynamic libc_thrsleep __thrsleep "libc.so"
//go:cgo_import_dynamic libc_thrwakeup __thrwakeup "libc.so"

	panicmem()
}

// func exitThread(wait *uint32)
// FIXME: wasm doesn't have atomic yet
func exitThread(wait *atomic.Uint32)

type mOS struct{}

func osyield()

//go:nosplit
func osyield_no_g() {
	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.

//go:noescape
func sys_umtx_sleep(addr *uint32, val, timeout int32) int32

//go:noescape
func sys_umtx_wakeup(addr *uint32, val int32) int32

func osyield()

//go:nosplit
func osyield_no_g() {
	osyield()
}

func kqueue() int32

//go:noescape
func kevent(kq int32, ch *keventt, nch int32, ev *keventt, nev int32, ts *timespec) int32

func pipe2(flags int32) (r, w int32, errno int32)

// Called from exitm, but not from drop, to undo the effect of thread-owned
// resources in minit, semacreate, or elsewhere. Do not take locks after calling this.
func mdestroy(mp *m) {
}

//go:nosplit
func osyield_no_g() {
	usleep_no_g(1)
}

//go:nosplit
func osyield() {
	usleep(1)
}

const (
	_NSIG        = 32
	_SI_USER     = 0 /* empirically true, but not what headers say */
	_SIG_BLOCK   = 1

//go:noescape
func lwp_unpark(lwp int32, hint unsafe.Pointer) int32

func lwp_self() int32

func osyield()

//go:nosplit
func osyield_no_g() {
	osyield()
}

func kqueue() int32

//go:noescape
func kevent(kq int32, ch *keventt, nch int32, ev *keventt, nev int32, ts *timespec) int32

func pipe2(flags int32) (r, w int32, errno int32)

}

func initsig(preinit bool) {
	if !preinit {
		notify(unsafe.Pointer(abi.FuncPCABI0(sigtramp)))
	}
}

//go:nosplit
func osyield() {
	sleep(0)
}

//go:nosplit
func osyield_no_g() {
	osyield()
}

//go:nosplit
func usleep(µs uint32) {
	ms := int32(µs / 1000)
	if ms == 0 {
		ms = 1
	}
	sleep(ms)
}

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

func thr_self() thread
func thr_kill(tid thread, sig int)

//go:noescape
func sys_umtx_op(addr *uint32, mode int32, val uint32, uaddr1 uintptr, ut *umtx_time) int32

func osyield()

//go:nosplit
func osyield_no_g() {
	osyield()
}

func kqueue() int32

//go:noescape
func kevent(kq int32, ch *keventt, nch int32, ev *keventt, nev int32, ts *timespec) int32

func pipe2(flags int32) (r, w int32, errno int32)

func fcntl(fd, cmd, arg int32) (ret int32, errno int32) {
	r1, err := sysvicall3Err(&libc_fcntl, uintptr(fd), uintptr(cmd), uintptr(arg))
	return int32(r1), int32(err)
}

func osyield1()

//go:nosplit
func osyield_no_g() {
	osyield1()
}

//go:nosplit
func osyield() {
	sysvicall0(&libc_sched_yield)
}

//go:linkname executablePath os.executablePath
var executablePath string

	if int32(pid) == -1 {
		println("syscall getpid failed: ", hex(err))
		throw("syscall raiseproc")
	}

	syscall2(&libc_kill, pid, uintptr(sig))
}

func osyield1()

//go:nosplit
func osyield_no_g() {
	osyield1()
}

//go:nosplit
func osyield() {
	r, err := syscall0(&libc_sched_yield)
	if int32(r) == -1 {
		println("syscall osyield failed: ", hex(err))
		throw("syscall osyield")
	}