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| // Copyright 2016 The Go Authors. All rights reserved.
| // Use of this source code is governed by a BSD-style
| // license that can be found in the LICENSE file.
|
| // +build freebsd
|
| package os
|
| import (
| "runtime"
| "syscall"
| )
|
| const _P_PID = 0
|
| // 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
| // The arguments on 32-bit FreeBSD look like the following:
| // - freebsd32_wait6_args{ idtype, id1, id2, status, options, wrusage, info } or
| // - freebsd32_wait6_args{ idtype, pad, id1, id2, status, options, wrusage, info } when PAD64_REQUIRED=1 on ARM, MIPS or PowerPC
| if runtime.GOARCH == "386" {
| _, _, errno = syscall.Syscall9(syscall.SYS_WAIT6, _P_PID, uintptr(p.Pid), 0, 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0, 0, 0)
| } else if runtime.GOARCH == "arm" {
| _, _, errno = syscall.Syscall9(syscall.SYS_WAIT6, _P_PID, 0, uintptr(p.Pid), 0, 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0, 0)
| } else {
| _, _, errno = syscall.Syscall6(syscall.SYS_WAIT6, _P_PID, uintptr(p.Pid), 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0)
| }
| runtime.KeepAlive(p)
| if errno != 0 {
| return false, NewSyscallError("wait6", errno)
| }
| return true, nil
| }
|
|
