| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef EXTENSIONS_BROWSER_SERIAL_EXTENSION_HOST_QUEUE_H_ |
| #define EXTENSIONS_BROWSER_SERIAL_EXTENSION_HOST_QUEUE_H_ |
| |
| #include <list> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "extensions/browser/extension_host_queue.h" |
| |
| namespace extensions { |
| |
| class DeferredStartRenderHost; |
| |
| // An ExtensionHostQueue which initializes DeferredStartRenderHosts in the order |
| // they're Add()ed, with simple rate limiting logic that re-posts each task to |
| // the UI thread, to avoid clogging it for a long period of time. |
| class SerialExtensionHostQueue : public ExtensionHostQueue { |
| public: |
| SerialExtensionHostQueue(); |
| ~SerialExtensionHostQueue() override; |
| |
| private: |
| // ExtensionHostQueue: |
| void Add(DeferredStartRenderHost* host) override; |
| void Remove(DeferredStartRenderHost* host) override; |
| |
| // Queues up a delayed task to process the next DeferredStartRenderHost in |
| // the queue. |
| void PostTask(); |
| |
| // Creates the RenderView for the next host in the queue. |
| void ProcessOneHost(); |
| |
| // True if this queue is currently in the process of starting an |
| // DeferredStartRenderHost. |
| bool pending_create_; |
| |
| // The list of DeferredStartRenderHosts waiting to be started. |
| std::list<DeferredStartRenderHost*> queue_; |
| |
| base::WeakPtrFactory<SerialExtensionHostQueue> ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SerialExtensionHostQueue); |
| }; |
| |
| } // namespace extensions |
| |
| #endif // EXTENSIONS_BROWSER_SERIAL_EXTENSION_HOST_QUEUE_H_ |