114 lines
2.8 KiB
Go
114 lines
2.8 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//+build windows
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package main
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import (
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"fmt"
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"io"
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"net"
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"os"
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"time"
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winio "github.com/Microsoft/go-winio"
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"github.com/pulumi/pulumi/sdk/v3/go/common/util/logging"
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)
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// Windows specific pipe implementation. Slightly complex as it sits on top of a pair of named pipes
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// that have to asynchronously accept connections to. But also fairly simple as windows will take
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// care of cleaning things up once our processes complete.
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func createPipes() (pipes, error) {
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// Generate a random pipe name so that we don't collide with other pipes made by other pulumi
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// instances.
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rand := uint32(time.Now().UnixNano() + int64(os.Getpid()))
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dir := fmt.Sprintf(`\\.\pipe\pulumi%v`, rand)
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reqPipeName := dir + `\invoke_req`
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resPipeName := dir + `\invoke_res`
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reqListener, err := winio.ListenPipe(reqPipeName, nil)
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if err != nil {
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logging.V(10).Infof("createPipes: Received error trying to create request pipe %s: %s\n", reqPipeName, err)
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return nil, err
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}
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resListener, err := winio.ListenPipe(resPipeName, nil)
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if err != nil {
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logging.V(10).Infof("createPipes: Received error trying to create response pipe %s: %s\n", resPipeName, err)
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return nil, err
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}
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return &windowsPipes{
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dir: dir,
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reqListener: reqListener,
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resListener: resListener,
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}, nil
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}
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type windowsPipes struct {
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dir string
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reqListener, resListener net.Listener
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reqConn, resConn net.Conn
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}
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func (p *windowsPipes) directory() string {
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return p.dir
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}
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func (p *windowsPipes) reader() io.Reader {
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return p.reqConn
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}
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func (p *windowsPipes) writer() io.Writer {
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return p.resConn
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}
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func (p *windowsPipes) connect() error {
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acceptDone := make(chan error)
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defer close(acceptDone)
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go func() {
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reqConn, err := p.reqListener.Accept()
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if err != nil {
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acceptDone <- err
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}
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p.reqConn = reqConn
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acceptDone <- nil
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}()
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go func() {
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resConn, err := p.resListener.Accept()
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if err != nil {
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acceptDone <- err
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}
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p.resConn = resConn
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acceptDone <- nil
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}()
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res1 := <-acceptDone
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res2 := <-acceptDone
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if res1 != nil {
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return res1
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}
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return res2
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}
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func (p *windowsPipes) shutdown() {
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// Don't need to do anything here. Named pipes are cleaned up when all processes that are using
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// them terminate.
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}
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