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// 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_REGISTRATION_HANDLE_H_
#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_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_registration.h"
#include "content/browser/service_worker/service_worker_version.h"
#include "content/common/service_worker/service_worker_types.h"
namespace content {
class ServiceWorkerContextCore;
class ServiceWorkerVersion;
// Roughly corresponds to one WebServiceWorkerRegistration object in the
// renderer process.
//
// The renderer process maintains the reference count by owning a
// ServiceWorkerRegistrationHandleReference for each reference it has to the
// registration object. ServiceWorkerRegistrationHandleReference creation and
// destruction sends an IPC to the browser process, which adjusts the
// ServiceWorkerRegistrationHandle refcount.
//
// Has a reference to the corresponding ServiceWorkerRegistration in order to
// ensure that the registration is alive while this handle is around.
class ServiceWorkerRegistrationHandle
: public ServiceWorkerRegistration::Listener {
public:
CONTENT_EXPORT ServiceWorkerRegistrationHandle(
base::WeakPtr<ServiceWorkerContextCore> context,
base::WeakPtr<ServiceWorkerProviderHost> provider_host,
ServiceWorkerRegistration* registration);
virtual ~ServiceWorkerRegistrationHandle();
ServiceWorkerRegistrationObjectInfo GetObjectInfo();
bool HasNoRefCount() const { return ref_count_ <= 0; }
void IncrementRefCount();
void DecrementRefCount();
int provider_id() const { return provider_id_; }
int handle_id() const { return handle_id_; }
ServiceWorkerRegistration* registration() { return registration_.get(); }
private:
// ServiceWorkerRegistration::Listener overrides.
void OnVersionAttributesChanged(
ServiceWorkerRegistration* registration,
ChangedVersionAttributesMask changed_mask,
const ServiceWorkerRegistrationInfo& info) override;
void OnRegistrationFailed(ServiceWorkerRegistration* registration) override;
void OnUpdateFound(ServiceWorkerRegistration* registration) override;
// Sets the corresponding version field to the given version or if the given
// version is nullptr, clears the field.
void SetVersionAttributes(
ChangedVersionAttributesMask changed_mask,
ServiceWorkerVersion* installing_version,
ServiceWorkerVersion* waiting_version,
ServiceWorkerVersion* active_version);
base::WeakPtr<ServiceWorkerContextCore> context_;
base::WeakPtr<ServiceWorkerProviderHost> provider_host_;
const int provider_id_;
const int handle_id_;
int ref_count_; // Created with 1.
// This handle is the primary owner of this registration.
scoped_refptr<ServiceWorkerRegistration> registration_;
DISALLOW_COPY_AND_ASSIGN(ServiceWorkerRegistrationHandle);
};
} // namespace content
#endif // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_REGISTRATION_HANDLE_H_
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