Subversion Repositories openrisc

// Copyright 2009 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.

package os

import (
        "errors"
        "runtime"
        "syscall"
        "unsafe"
)

// Wait waits for the Process to exit or stop, and then returns a
// Waitmsg describing its status and an error, if any.
func (p *Process) Wait(options int) (w *Waitmsg, err error) {
        s, e := syscall.WaitForSingleObject(syscall.Handle(p.handle), syscall.INFINITE)
        switch s {
        case syscall.WAIT_OBJECT_0:
                break
        case syscall.WAIT_FAILED:
                return nil, NewSyscallError("WaitForSingleObject", e)
        default:
                return nil, errors.New("os: unexpected result from WaitForSingleObject")
        }
        var ec uint32
        e = syscall.GetExitCodeProcess(syscall.Handle(p.handle), &ec)
        if e != nil {
                return nil, NewSyscallError("GetExitCodeProcess", e)
        }
        p.done = true
        return &Waitmsg{p.Pid, syscall.WaitStatus{Status: s, ExitCode: ec}, new(syscall.Rusage)}, nil
}

// Signal sends a signal to the Process.
func (p *Process) Signal(sig Signal) error {
        if p.done {
                return errors.New("os: process already finished")
        }
        if us, ok := sig.(UnixSignal); ok && us == syscall.SIGKILL {
                e := syscall.TerminateProcess(syscall.Handle(p.handle), 1)
                return NewSyscallError("TerminateProcess", e)
        }
        return syscall.Errno(syscall.EWINDOWS)
}

// Release releases any resources associated with the Process.
func (p *Process) Release() error {
        if p.handle == uintptr(syscall.InvalidHandle) {
                return EINVAL
        }
        e := syscall.CloseHandle(syscall.Handle(p.handle))
        if e != nil {
                return NewSyscallError("CloseHandle", e)
        }
        p.handle = uintptr(syscall.InvalidHandle)
        // no need for a finalizer anymore
        runtime.SetFinalizer(p, nil)
        return nil
}

func findProcess(pid int) (p *Process, err error) {
        const da = syscall.STANDARD_RIGHTS_READ |
                syscall.PROCESS_QUERY_INFORMATION | syscall.SYNCHRONIZE
        h, e := syscall.OpenProcess(da, false, uint32(pid))
        if e != nil {
                return nil, NewSyscallError("OpenProcess", e)
        }
        return newProcess(pid, uintptr(h)), nil
}

func init() {
        var argc int32
        cmd := syscall.GetCommandLine()
        argv, e := syscall.CommandLineToArgv(cmd, &argc)
        if e != nil {
                return
        }
        defer syscall.LocalFree(syscall.Handle(uintptr(unsafe.Pointer(argv))))
        Args = make([]string, argc)
        for i, v := range (*argv)[:argc] {
                Args[i] = string(syscall.UTF16ToString((*v)[:]))
        }
}