mirror of git://gcc.gnu.org/git/gcc.git
71 lines
2.1 KiB
Go
71 lines
2.1 KiB
Go
// Copyright 2009 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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package os
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import (
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"runtime"
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"sync/atomic"
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"syscall"
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)
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// Process stores the information about a process created by StartProcess.
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type Process struct {
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Pid int
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handle uintptr
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isdone uint32 // process has been successfully waited on, non zero if true
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}
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func newProcess(pid int, handle uintptr) *Process {
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p := &Process{Pid: pid, handle: handle}
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runtime.SetFinalizer(p, (*Process).Release)
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return p
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}
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func (p *Process) setDone() {
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atomic.StoreUint32(&p.isdone, 1)
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}
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func (p *Process) done() bool {
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return atomic.LoadUint32(&p.isdone) > 0
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}
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// ProcAttr holds the attributes that will be applied to a new process
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// started by StartProcess.
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type ProcAttr struct {
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// If Dir is non-empty, the child changes into the directory before
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// creating the process.
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Dir string
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// If Env is non-nil, it gives the environment variables for the
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// new process in the form returned by Environ.
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// If it is nil, the result of Environ will be used.
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Env []string
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// Files specifies the open files inherited by the new process. The
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// first three entries correspond to standard input, standard output, and
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// standard error. An implementation may support additional entries,
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// depending on the underlying operating system. A nil entry corresponds
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// to that file being closed when the process starts.
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Files []*File
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// Operating system-specific process creation attributes.
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// Note that setting this field means that your program
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// may not execute properly or even compile on some
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// operating systems.
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Sys *syscall.SysProcAttr
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}
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// A Signal represents an operating system signal.
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// The usual underlying implementation is operating system-dependent:
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// on Unix it is syscall.Signal.
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type Signal interface {
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String() string
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Signal() // to distinguish from other Stringers
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}
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// Getpid returns the process id of the caller.
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func Getpid() int { return syscall.Getpid() }
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// Getppid returns the process id of the caller's parent.
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func Getppid() int { return syscall.Getppid() }
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