mirror of https://go.googlesource.com/go
33 lines
781 B
Go
33 lines
781 B
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build dragonfly || freebsd || netbsd
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package os
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import (
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"runtime"
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"syscall"
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)
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// blockUntilWaitable attempts to block until a call to p.Wait will
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// succeed immediately, and reports whether it has done so.
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// It does not actually call p.Wait.
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func (p *Process) blockUntilWaitable() (bool, error) {
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var errno syscall.Errno
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for {
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_, errno = wait6(_P_PID, p.Pid, syscall.WEXITED|syscall.WNOWAIT)
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if errno != syscall.EINTR {
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break
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}
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}
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runtime.KeepAlive(p)
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if errno == syscall.ENOSYS {
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return false, nil
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} else if errno != 0 {
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return false, NewSyscallError("wait6", errno)
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}
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return true, nil
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}
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