| // Copyright 2014 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 CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_HANDLE_H_ |
| #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_HANDLE_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/weak_ptr.h" |
| #include "content/browser/service_worker/service_worker_version.h" |
| #include "content/common/content_export.h" |
| #include "content/common/service_worker/service_worker_types.h" |
| |
| namespace IPC { |
| class Sender; |
| } |
| |
| namespace content { |
| |
| class ServiceWorkerContextCore; |
| |
| // Roughly corresponds to one WebServiceWorker object in the renderer process. |
| // |
| // The renderer process maintains the reference count by owning a |
| // ServiceWorkerHandleReference for each reference it has to the service worker |
| // object. ServiceWorkerHandleReference creation and destruction sends an IPC to |
| // the browser process, which adjusts the ServiceWorkerHandle refcount. |
| // |
| // Has references to the corresponding ServiceWorkerVersion in order to ensure |
| // that the version is alive while this handle is around. |
| class CONTENT_EXPORT ServiceWorkerHandle |
| : NON_EXPORTED_BASE(public ServiceWorkerVersion::Listener) { |
| public: |
| // Creates a handle for a live version. This may return nullptr if any of |
| // |context|, |provider_host| and |version| is nullptr. |
| static std::unique_ptr<ServiceWorkerHandle> Create( |
| base::WeakPtr<ServiceWorkerContextCore> context, |
| base::WeakPtr<ServiceWorkerProviderHost> provider_host, |
| ServiceWorkerVersion* version); |
| |
| ServiceWorkerHandle(base::WeakPtr<ServiceWorkerContextCore> context, |
| base::WeakPtr<ServiceWorkerProviderHost> provider_host, |
| ServiceWorkerVersion* version); |
| ~ServiceWorkerHandle() override; |
| |
| // ServiceWorkerVersion::Listener overrides. |
| void OnVersionStateChanged(ServiceWorkerVersion* version) override; |
| |
| ServiceWorkerObjectInfo GetObjectInfo(); |
| |
| int provider_id() const { return provider_id_; } |
| int handle_id() const { return handle_id_; } |
| ServiceWorkerVersion* version() { return version_.get(); } |
| |
| int ref_count() const { return ref_count_; } |
| bool HasNoRefCount() const { return ref_count_ <= 0; } |
| void IncrementRefCount(); |
| void DecrementRefCount(); |
| |
| private: |
| base::WeakPtr<ServiceWorkerContextCore> context_; |
| base::WeakPtr<ServiceWorkerProviderHost> provider_host_; |
| const int provider_id_; |
| const int handle_id_; |
| int ref_count_; // Created with 1. |
| scoped_refptr<ServiceWorkerVersion> version_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ServiceWorkerHandle); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_HANDLE_H_ |