content/browser/service_worker/service_worker_registration_handle.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_HANDLE_H_
   6 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_HANDLE_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "content/browser/service_worker/service_worker_registration.h"
  12 #include "content/browser/service_worker/service_worker_version.h"
  13 #include "content/common/service_worker/service_worker_types.h"
  14
  15 namespace content {
  16
  17 class ServiceWorkerContextCore;
  18 class ServiceWorkerDispatcherHost;
  19 class ServiceWorkerVersion;
  20
  21 // Roughly corresponds to one WebServiceWorkerRegistration object in the
  22 // renderer process.
  23 //
  24 // The renderer process maintains the reference count by owning a
  25 // ServiceWorkerRegistrationHandleReference for each reference it has to the
  26 // registration object. ServiceWorkerRegistrationHandleReference creation and
  27 // destruction sends an IPC to the browser process, which adjusts the
  28 // ServiceWorkerRegistrationHandle refcount.
  29 //
  30 // Has a reference to the corresponding ServiceWorkerRegistration in order to
  31 // ensure that the registration is alive while this handle is around.
  32 class ServiceWorkerRegistrationHandle
  33     : public ServiceWorkerRegistration::Listener {
  34  public:
  35   CONTENT_EXPORT ServiceWorkerRegistrationHandle(
  36       base::WeakPtr<ServiceWorkerContextCore> context,
  37       base::WeakPtr<ServiceWorkerProviderHost> provider_host,
  38       ServiceWorkerRegistration* registration);
  39   virtual ~ServiceWorkerRegistrationHandle();
  40
  41   ServiceWorkerRegistrationObjectInfo GetObjectInfo();
  42
  43   bool HasNoRefCount() const { return ref_count_ <= 0; }
  44   void IncrementRefCount();
  45   void DecrementRefCount();
  46
  47   int provider_id() const { return provider_id_; }
  48   int handle_id() const { return handle_id_; }
  49
  50   ServiceWorkerRegistration* registration() { return registration_.get(); }
  51
  52  private:
  53   // ServiceWorkerRegistration::Listener overrides.
  54   void OnVersionAttributesChanged(
  55       ServiceWorkerRegistration* registration,
  56       ChangedVersionAttributesMask changed_mask,
  57       const ServiceWorkerRegistrationInfo& info) override;
  58   void OnRegistrationFailed(ServiceWorkerRegistration* registration) override;
  59   void OnUpdateFound(ServiceWorkerRegistration* registration) override;
  60
  61   // Sets the corresponding version field to the given version or if the given
  62   // version is nullptr, clears the field.
  63   void SetVersionAttributes(
  64       ChangedVersionAttributesMask changed_mask,
  65       ServiceWorkerVersion* installing_version,
  66       ServiceWorkerVersion* waiting_version,
  67       ServiceWorkerVersion* active_version);
  68
  69   base::WeakPtr<ServiceWorkerContextCore> context_;
  70   base::WeakPtr<ServiceWorkerProviderHost> provider_host_;
  71   const int provider_id_;
  72   const int handle_id_;
  73   int ref_count_;  // Created with 1.
  74
  75   // This handle is the primary owner of this registration.
  76   scoped_refptr<ServiceWorkerRegistration> registration_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistrationHandle);
  79 };
  80
  81 }  // namespace content
  82
  83 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_HANDLE_H_