Thanos did someting

[bytom/vapor.git] / vendor / github.com / btcsuite / btcd / database / cmd / dbtool / signal.go

diff --git a/vendor/github.com/btcsuite/btcd/database/cmd/dbtool/signal.go b/vendor/github.com/btcsuite/btcd/database/cmd/dbtool/signal.go
deleted file mode 100644 (file)
index a32f1b3..0000000
--- a/vendor/github.com/btcsuite/btcd/database/cmd/dbtool/signal.go
+++ /dev/null
@@ -1,82 +0,0 @@
-// Copyright (c) 2013-2016 The btcsuite developers
-// Use of this source code is governed by an ISC
-// license that can be found in the LICENSE file.
-
-package main
-
-import (
-       "os"
-       "os/signal"
-)
-
-// interruptChannel is used to receive SIGINT (Ctrl+C) signals.
-var interruptChannel chan os.Signal
-
-// addHandlerChannel is used to add an interrupt handler to the list of handlers
-// to be invoked on SIGINT (Ctrl+C) signals.
-var addHandlerChannel = make(chan func())
-
-// mainInterruptHandler listens for SIGINT (Ctrl+C) signals on the
-// interruptChannel and invokes the registered interruptCallbacks accordingly.
-// It also listens for callback registration.  It must be run as a goroutine.
-func mainInterruptHandler() {
-       // interruptCallbacks is a list of callbacks to invoke when a
-       // SIGINT (Ctrl+C) is received.
-       var interruptCallbacks []func()
-
-       // isShutdown is a flag which is used to indicate whether or not
-       // the shutdown signal has already been received and hence any future
-       // attempts to add a new interrupt handler should invoke them
-       // immediately.
-       var isShutdown bool
-
-       for {
-               select {
-               case <-interruptChannel:
-                       // Ignore more than one shutdown signal.
-                       if isShutdown {
-                               log.Infof("Received SIGINT (Ctrl+C).  " +
-                                       "Already shutting down...")
-                               continue
-                       }
-
-                       isShutdown = true
-                       log.Infof("Received SIGINT (Ctrl+C).  Shutting down...")
-
-                       // Run handlers in LIFO order.
-                       for i := range interruptCallbacks {
-                               idx := len(interruptCallbacks) - 1 - i
-                               callback := interruptCallbacks[idx]
-                               callback()
-                       }
-
-                       // Signal the main goroutine to shutdown.
-                       go func() {
-                               shutdownChannel <- nil
-                       }()
-
-               case handler := <-addHandlerChannel:
-                       // The shutdown signal has already been received, so
-                       // just invoke and new handlers immediately.
-                       if isShutdown {
-                               handler()
-                       }
-
-                       interruptCallbacks = append(interruptCallbacks, handler)
-               }
-       }
-}
-
-// addInterruptHandler adds a handler to call when a SIGINT (Ctrl+C) is
-// received.
-func addInterruptHandler(handler func()) {
-       // Create the channel and start the main interrupt handler which invokes
-       // all other callbacks and exits if not already done.
-       if interruptChannel == nil {
-               interruptChannel = make(chan os.Signal, 1)
-               signal.Notify(interruptChannel, os.Interrupt)
-               go mainInterruptHandler()
-       }
-
-       addHandlerChannel <- handler
-}