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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_HANDLE_H_
#define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_HANDLE_H_
#include "base/basictypes.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.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;
class ServiceWorkerRegistration;
// Roughly corresponds to one ServiceWorker object in the renderer process
// (WebServiceWorkerImpl).
// Has references to the corresponding ServiceWorkerVersion and
// ServiceWorkerRegistration (therefore they're guaranteed to be alive while
// this handle is around).
class CONTENT_EXPORT ServiceWorkerHandle
: NON_EXPORTED_BASE(public ServiceWorkerVersion::Listener) {
public:
// Creates a handle for a live version. The version's corresponding
// registration must be also alive.
// This may return NULL if |context|.get() or |version| is NULL.
// |sender| will be used to send messages to the corresponding
// WebServiceWorkerImpl in the child process.
static scoped_ptr<ServiceWorkerHandle> Create(
base::WeakPtr<ServiceWorkerContextCore> context,
IPC::Sender* sender,
ServiceWorkerVersion* version);
ServiceWorkerHandle(base::WeakPtr<ServiceWorkerContextCore> context,
IPC::Sender* sender,
ServiceWorkerRegistration* registration,
ServiceWorkerVersion* version);
~ServiceWorkerHandle() override;
// ServiceWorkerVersion::Listener overrides.
void OnVersionStateChanged(ServiceWorkerVersion* version) override;
ServiceWorkerObjectInfo GetObjectInfo();
int handle_id() const { return handle_id_; }
ServiceWorkerRegistration* registration() { return registration_.get(); }
ServiceWorkerVersion* version() { return version_.get(); }
bool HasNoRefCount() const { return ref_count_ <= 0; }
void IncrementRefCount();
void DecrementRefCount();
private:
base::WeakPtr<ServiceWorkerContextCore> context_;
IPC::Sender* sender_; // Not owned, it should always outlive this.
const int handle_id_;
int ref_count_; // Created with 1.
scoped_refptr<ServiceWorkerRegistration> registration_;
scoped_refptr<ServiceWorkerVersion> version_;
DISALLOW_COPY_AND_ASSIGN(ServiceWorkerHandle);
};
} // namespace content
#endif // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_HANDLE_H_
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