1 // Copyright 2016 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
16 // blockUntilWaitable attempts to block until a call to p.Wait will
17 // succeed immediately, and reports whether it has done so.
18 // It does not actually call p.Wait.
19 func (p *Process) blockUntilWaitable() (bool, error) {
20 var errno syscall.Errno
21 // The arguments on 32-bit FreeBSD look like the following:
22 // - freebsd32_wait6_args{ idtype, id1, id2, status, options, wrusage, info } or
23 // - freebsd32_wait6_args{ idtype, pad, id1, id2, status, options, wrusage, info } when PAD64_REQUIRED=1 on ARM, MIPS or PowerPC
24 if runtime.GOARCH == "386" {
25 _, _, errno = syscall.Syscall9(syscall.SYS_WAIT6, _P_PID, uintptr(p.Pid), 0, 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0, 0, 0)
26 } else if runtime.GOARCH == "arm" {
27 _, _, errno = syscall.Syscall9(syscall.SYS_WAIT6, _P_PID, 0, uintptr(p.Pid), 0, 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0, 0)
29 _, _, errno = syscall.Syscall6(syscall.SYS_WAIT6, _P_PID, uintptr(p.Pid), 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0)
33 return false, NewSyscallError("wait6", errno)