//go:cgo_import_dynamic libc_Getpgid getpgid "libc.so"
//go:cgo_import_dynamic libc_Getpgrp getpgrp "libc.so"

//go:linkname libc_Getpgid libc_Getpgid
//go:linkname libc_Getpgrp libc_Getpgrp

var (
	libc_Getpgid,
	libc_Getpgrp libcFunc
)

func Getpgid(pid int) (pgid int, err error) {
	r0, _, e1 := sysvicall6(uintptr(unsafe.Pointer(&libc_Getpgid)), 1, uintptr(pid), 0, 0, 0, 0, 0)
	pgid = int(r0)
	if e1 != 0 {
		err = e1
	}
	return
}

//go:cgo_import_dynamic libc_Getpgrp getpgrp "libc.a/shr_64.o"

//go:linkname libc_Getpgid libc_Getpgid
//go:linkname libc_Getpgrp libc_Getpgrp

var (
	libc_Getpgid,
	libc_Getpgrp libcFunc
)

func Getpgid(pid int) (pgid int, err error) {
	r0, _, e1 := syscall6(uintptr(unsafe.Pointer(&libc_Getpgid)), 1, uintptr(pid), 0, 0, 0, 0, 0)
	pgid = int(r0)
	if e1 != 0 {
		err = e1
	}
	return
}

//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_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,

// It's also based on Solaris implementation for the arming mechanisms

//go:cgo_import_dynamic libc_poll poll "libc.a/shr_64.o"
//go:linkname libc_poll libc_poll

var libc_poll libFunc

//go:nosplit
func poll(pfds *pollfd, npfds uintptr, timeout uintptr) (int32, int32) {
	r, err := syscall3(&libc_poll, uintptr(unsafe.Pointer(pfds)), npfds, timeout)
	return int32(r), int32(err)
}