зеркало из https://github.com/mozilla/gecko-dev.git
50 строки
2.0 KiB
C++
50 строки
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef mozilla_dom_ServiceWorkerCloneData_h__
|
|
#define mozilla_dom_ServiceWorkerCloneData_h__
|
|
|
|
#include "mozilla/dom/ipc/StructuredCloneData.h"
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
|
|
// Helper class used to pack structured clone data so that it can be
|
|
// passed across thread and process boundaries. Currently the raw
|
|
// StructuredCloneData and StructureCloneHolder APIs both make it
|
|
// difficult to meet this needs directly. This helper class improves
|
|
// the situation by:
|
|
//
|
|
// 1. Provides a ref-counted version of StructuredCloneData. We need
|
|
// StructuredCloneData so we can serialize/deserialize across IPC.
|
|
// The move constructor problems in StructuredCloneData (bug 1462676),
|
|
// though, makes it hard to pass it around. Passing a ref-counted
|
|
// pointer addresses this problem.
|
|
// 2. Normally StructuredCloneData runs into problems if you try to move
|
|
// it across thread boundaries because it releases its SharedJSAllocatedData
|
|
// on the wrong thread. This helper will correctly proxy release the
|
|
// shared data on the correct thread.
|
|
//
|
|
// This helper class should really just be used to serialize on one thread
|
|
// and then move the reference across thread/process boundries to the
|
|
// target worker thread. This class is not intended to support simultaneous
|
|
// read/write operations from different threads at the same time.
|
|
class ServiceWorkerCloneData final : public ipc::StructuredCloneData {
|
|
nsCOMPtr<nsISerialEventTarget> mEventTarget;
|
|
|
|
~ServiceWorkerCloneData();
|
|
|
|
public:
|
|
ServiceWorkerCloneData();
|
|
|
|
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ServiceWorkerCloneData)
|
|
};
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_dom_ServiceWorkerCloneData_h__
|