content/browser/service_worker/service_worker_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_HANDLE_H_
   6 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_HANDLE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "content/browser/service_worker/service_worker_version.h"
  13 #include "content/common/content_export.h"
  14 #include "content/common/service_worker/service_worker_types.h"
  15
  16 namespace IPC {
  17 class Sender;
  18 }
  19
  20 namespace content {
  21
  22 class ServiceWorkerContextCore;
  23 class ServiceWorkerRegistration;
  24
  25 // Roughly corresponds to one ServiceWorker object in the renderer process
  26 // (WebServiceWorkerImpl).
  27 // Has references to the corresponding ServiceWorkerVersion and
  28 // ServiceWorkerRegistration (therefore they're guaranteed to be alive while
  29 // this handle is around).
  30 class CONTENT_EXPORT ServiceWorkerHandle
  31     : NON_EXPORTED_BASE(public ServiceWorkerVersion::Listener) {
  32  public:
  33   // Creates a handle for a live version. The version's corresponding
  34   // registration must be also alive.
  35   // This may return NULL if |context|.get() or |version| is NULL.
  36   static scoped_ptr<ServiceWorkerHandle> Create(
  37       base::WeakPtr<ServiceWorkerContextCore> context,
  38       base::WeakPtr<ServiceWorkerProviderHost> provider_host,
  39       ServiceWorkerVersion* version);
  40
  41   ServiceWorkerHandle(base::WeakPtr<ServiceWorkerContextCore> context,
  42                       base::WeakPtr<ServiceWorkerProviderHost> provider_host,
  43                       ServiceWorkerRegistration* registration,
  44                       ServiceWorkerVersion* version);
  45   ~ServiceWorkerHandle() override;
  46
  47   // ServiceWorkerVersion::Listener overrides.
  48   void OnVersionStateChanged(ServiceWorkerVersion* version) override;
  49
  50   ServiceWorkerObjectInfo GetObjectInfo();
  51
  52   int handle_id() const { return handle_id_; }
  53   ServiceWorkerRegistration* registration() { return registration_.get(); }
  54   ServiceWorkerVersion* version() { return version_.get(); }
  55
  56   bool HasNoRefCount() const { return ref_count_ <= 0; }
  57   void IncrementRefCount();
  58   void DecrementRefCount();
  59
  60  private:
  61   base::WeakPtr<ServiceWorkerContextCore> context_;
  62   base::WeakPtr<ServiceWorkerProviderHost> provider_host_;
  63   const int handle_id_;
  64   int ref_count_;  // Created with 1.
  65   scoped_refptr<ServiceWorkerRegistration> registration_;
  66   scoped_refptr<ServiceWorkerVersion> version_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerHandle);
  69 };
  70
  71 }  // namespace content
  72
  73 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_HANDLE_H_