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Diffstat (limited to 'vendor/golang.org/x/net/netutil/listen.go')
-rw-r--r--vendor/golang.org/x/net/netutil/listen.go74
1 files changed, 0 insertions, 74 deletions
diff --git a/vendor/golang.org/x/net/netutil/listen.go b/vendor/golang.org/x/net/netutil/listen.go
deleted file mode 100644
index cee46e3..0000000
--- a/vendor/golang.org/x/net/netutil/listen.go
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright 2013 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 netutil provides network utility functions, complementing the more
-// common ones in the net package.
-package netutil // import "golang.org/x/net/netutil"
-
-import (
- "net"
- "sync"
-)
-
-// LimitListener returns a Listener that accepts at most n simultaneous
-// connections from the provided Listener.
-func LimitListener(l net.Listener, n int) net.Listener {
- return &limitListener{
- Listener: l,
- sem: make(chan struct{}, n),
- done: make(chan struct{}),
- }
-}
-
-type limitListener struct {
- net.Listener
- sem chan struct{}
- closeOnce sync.Once // ensures the done chan is only closed once
- done chan struct{} // no values sent; closed when Close is called
-}
-
-// acquire acquires the limiting semaphore. Returns true if successfully
-// accquired, false if the listener is closed and the semaphore is not
-// acquired.
-func (l *limitListener) acquire() bool {
- select {
- case <-l.done:
- return false
- case l.sem <- struct{}{}:
- return true
- }
-}
-func (l *limitListener) release() { <-l.sem }
-
-func (l *limitListener) Accept() (net.Conn, error) {
- acquired := l.acquire()
- // If the semaphore isn't acquired because the listener was closed, expect
- // that this call to accept won't block, but immediately return an error.
- c, err := l.Listener.Accept()
- if err != nil {
- if acquired {
- l.release()
- }
- return nil, err
- }
- return &limitListenerConn{Conn: c, release: l.release}, nil
-}
-
-func (l *limitListener) Close() error {
- err := l.Listener.Close()
- l.closeOnce.Do(func() { close(l.done) })
- return err
-}
-
-type limitListenerConn struct {
- net.Conn
- releaseOnce sync.Once
- release func()
-}
-
-func (l *limitListenerConn) Close() error {
- err := l.Conn.Close()
- l.releaseOnce.Do(l.release)
- return err
-}