package os

import (
	"runtime"
	"syscall"
)

// blockUntilWaitable attempts to block until a call to p.Wait will
// succeed immediately, and reports whether it has done so.
// It does not actually call p.Wait.
func (p *Process) blockUntilWaitable() (bool, error) {
	var errno syscall.Errno
	for {
		_, errno = wait6(_P_PID, p.Pid, syscall.WEXITED|syscall.WNOWAIT)
		if errno != syscall.EINTR {
			break
		}
	}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package os

import (
	"syscall"
	"unsafe"
)

const _P_PID = 0

func wait6(idtype, id, options int) (status int, errno syscall.Errno) {
	// freebsd32_wait6_args{ idtype, pad, id1, id2, status, options, wrusage, info }

// license that can be found in the LICENSE file.

//go:build freebsd && (amd64 || arm64 || riscv64)

package os

import (
	"syscall"
	"unsafe"
)

const _P_PID = 0

func wait6(idtype, id, options int) (status int, errno syscall.Errno) {
	var status32 int32 // C.int
	_, _, errno = syscall.Syscall6(syscall.SYS_WAIT6, uintptr(idtype), uintptr(id), uintptr(unsafe.Pointer(&status32)), uintptr(options), 0, 0)

// aix, darwin, js/wasm, openbsd, solaris and wasip1/wasm don't implement
// waitid/wait6.

//go:build aix || darwin || (js && wasm) || openbsd || solaris || wasip1

package os

// blockUntilWaitable attempts to block until a call to p.Wait will
// succeed immediately, and reports whether it has done so.
// It does not actually call p.Wait.
// This version is used on systems that do not implement waitid,

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package os

import (
	"syscall"
	"unsafe"
)

const _P_PID = 0

func wait6(idtype, id, options int) (status int, errno syscall.Errno) {
	var status32 int32 // C.int
	_, _, errno = syscall.Syscall6(syscall.SYS_WAIT6, uintptr(idtype), uintptr(id), uintptr(unsafe.Pointer(&status32)), uintptr(options), 0, 0)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package os

import (
	"syscall"
	"unsafe"
)

const _P_PID = 0

func wait6(idtype, id, options int) (status int, errno syscall.Errno) {
	// freebsd32_wait6_args{ idtype, id1, id2, status, options, wrusage, info }

// license that can be found in the LICENSE file.

package os

import (
	"syscall"
	"unsafe"
)

const _P_PID = 1 // not 0 as on FreeBSD and Dragonfly!

func wait6(idtype, id, options int) (status int, errno syscall.Errno) {
	var status32 int32 // C.int
	_, _, errno = syscall.Syscall6(syscall.SYS_WAIT6, uintptr(idtype), uintptr(id), uintptr(unsafe.Pointer(&status32)), uintptr(options), 0, 0)

	SYS_POSIX_FALLOCATE          = 530 // { int posix_fallocate(int fd, \
	SYS_POSIX_FADVISE            = 531 // { int posix_fadvise(int fd, off_t offset, \
	SYS_WAIT6                    = 532 // { int wait6(idtype_t idtype, id_t id, \
	SYS_BINDAT                   = 538 // { int bindat(int fd, int s, caddr_t name, \
	SYS_CONNECTAT                = 539 // { int connectat(int fd, int s, caddr_t name, \

	SYS_POSIX_FALLOCATE          = 530 // { int posix_fallocate(int fd, \
	SYS_POSIX_FADVISE            = 531 // { int posix_fadvise(int fd, off_t offset, \
	SYS_WAIT6                    = 532 // { int wait6(idtype_t idtype, id_t id, \
	SYS_BINDAT                   = 538 // { int bindat(int fd, int s, caddr_t name, \
	SYS_CONNECTAT                = 539 // { int connectat(int fd, int s, caddr_t name, \

	SYS_ACCEPT4                = 541 // { int accept4(int s, caddr_t name, int *anamelen, int flags); }
	SYS_WAIT6                  = 548 // { int wait6(idtype_t idtype, id_t id, int *status, int options, struct __wrusage *wrusage, siginfo_t *info); }