Initial checkin of gRPC to third_party/

third_party/grpc/src/node/interop/async_delay_queue.js

 /*
- * Copyright (C) 2011 Google Inc.  All rights reserved.
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
  */
 
-#ifndef WebSocketChannelClient_h
-#define WebSocketChannelClient_h
+'use strict';
 
-#include "modules/ModulesExport.h"
-#include "platform/heap/Handle.h"
-#include "wtf/Forward.h"
-#include "wtf/PassOwnPtr.h"
-#include "wtf/Vector.h"
-#include <stdint.h>
+var _ = require('lodash');
 
-namespace blink {
+/**
+ * This class represents a queue of callbacks that must happen sequentially,
+ * each with a specific delay after the previous event.
+ */
+function AsyncDelayQueue() {
+  this.queue = [];
 
-class MODULES_EXPORT WebSocketChannelClient : public GarbageCollectedMixin {
-public:
-    virtual ~WebSocketChannelClient() { }
-    virtual void didConnect(const String& subprotocol, const String& extensions) { }
-    virtual void didReceiveTextMessage(const String&) { }
-    virtual void didReceiveBinaryMessage(PassOwnPtr<Vector<char>>) { }
-    virtual void didError() { }
-    virtual void didConsumeBufferedAmount(uint64_t consumed) { }
-    virtual void didStartClosingHandshake() { }
-    enum ClosingHandshakeCompletionStatus {
-        ClosingHandshakeIncomplete,
-        ClosingHandshakeComplete
-    };
-    virtual void didClose(ClosingHandshakeCompletionStatus, unsigned short /* code */, const String& /* reason */) { }
-    DEFINE_INLINE_VIRTUAL_TRACE() { }
+  this.callback_pending = false;
+}
 
-protected:
-    WebSocketChannelClient() { }
+/**
+ * Run the next callback after its corresponding delay, if there are any
+ * remaining.
+ */
+AsyncDelayQueue.prototype.runNext = function() {
+  var next = this.queue.shift();
+  var continueCallback = _.bind(this.runNext, this);
+  if (next) {
+    this.callback_pending = true;
+    setTimeout(function() {
+      next.callback(continueCallback);
+    }, next.delay);
+  } else {
+    this.callback_pending = false;
+  }
 };
 
-} // namespace blink
+/**
+ * Add a callback to be called with a specific delay after now or after the
+ * current last item in the queue or current pending callback, whichever is
+ * latest.
+ * @param {function(function())} callback The callback
+ * @param {Number} The delay to apply, in milliseconds
+ */
+AsyncDelayQueue.prototype.add = function(callback, delay) {
+  this.queue.push({callback: callback, delay: delay});
+  if (!this.callback_pending) {
+    this.runNext();
+  }
+};
 
-#endif // WebSocketChannelClient_h
+module.exports = AsyncDelayQueue;