44 lines
1.5 KiB
Go
44 lines
1.5 KiB
Go
|
// 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.
|
||
|
|
|
||
|
|
//go:build dragonfly || 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
|
||
|
|
for {
|
||
|
|
// 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.GOOS == "freebsd" && 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.GOOS == "freebsd" && 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)
|
||
|
|
}
|
||
|
|
if errno != syscall.EINTR {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
}
|
||
|
|
runtime.KeepAlive(p)
|
||
|
|
if errno == syscall.ENOSYS {
|
||
|
|
return false, nil
|
||
|
|
} else if errno != 0 {
|
||
|
|
return false, NewSyscallError("wait6", errno)
|
||
|
|
}
|
||
|
|
return true, nil
|
||
|
|
}
|