//go:linkname libc_port_getn libc_port_getn
//go:linkname libc_port_alert libc_port_alert

var (
	libc_port_create,
	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))

	libc_sem_post,
	libc_sem_reltimedwait_np,
	libc_sem_wait,
	libc_setitimer,
	libc_sigaction,
	libc_sigaltstack,
	libc_sigprocmask,
	libc_sysconf,
	libc_usleep,
	libc_write,
	libc_pipe2 libcFunc
)

var sigset_all = sigset{[4]uint32{^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)}}

func getPageSize() uintptr {
	n := int32(sysconf(__SC_PAGESIZE))
	if n <= 0 {
		return 0
	}

//go:linkname libc_recvfrom libc_recvfrom
//go:linkname libc___xnet_recvmsg libc___xnet_recvmsg
//go:linkname libc_getexecname libc_getexecname
//go:linkname libc_utimensat libc_utimensat

type libcFunc uintptr

var (
	libc_pipe2,
	libc_accept4,
	libc_Getcwd,
	libc_getgroups,
	libc_setgroups,
	libc_fcntl,
	libc_accept,
	libc___xnet_sendmsg,
	libc_Access,
	libc_Adjtime,

//go:linkname libc_write libc_write
//go:linkname libc_writev libc_writev
//go:linkname libc_gettimeofday libc_gettimeofday
//go:linkname libc_mmap libc_mmap
//go:linkname libc_munmap libc_munmap

type libcFunc uintptr

var (
	libc_fcntl,
	libc_Dup2,
	libc_pipe,
	libc_readlink,
	libc_utimes,
	libc_utimensat,
	libc_unlinkat,
	libc_getcwd,
	libc_getgroups,
	libc_setgroups,
	libc_getdirent,

	libpthread_attr_setstackaddr,
	libpthread_create,
	libpthread_sigthreadmask,
	libpthread_self,
	libpthread_kill libFunc
)

type libFunc uintptr

// asmsyscall6 calls the libc symbol using a C convention.
// It's defined in sys_aix_ppc64.go.
var asmsyscall6 libFunc

// syscallX functions must always be called with g != nil and m != nil,
// as it relies on g.m.libcall to pass arguments to asmcgocall.