зеркало из https://github.com/mozilla/gecko-dev.git
43 строки
1.3 KiB
C
43 строки
1.3 KiB
C
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_JSObjectHolder_h
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#define mozilla_JSObjectHolder_h
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#include "js/RootingAPI.h"
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#include "nsISupportsImpl.h"
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namespace mozilla {
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// This class is useful when something on one thread needs to keep alive
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// a JS Object from another thread. If they are both on the same thread, the
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// owning class should instead be made a cycle collected SCRIPT_HOLDER class.
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// This object should only be AddRefed and Released on the same thread as
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// mJSObject.
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//
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// Note that this keeps alive the JS object until it goes away, so be sure not to
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// create cycles that keep alive the holder.
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//
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// JSObjectHolder is ISupports to make it usable with NS_ReleaseOnMainThread.
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class JSObjectHolder final : public nsISupports
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{
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public:
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JSObjectHolder(JSContext* aCx, JSObject* aObject) : mJSObject(aCx, aObject) {}
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NS_DECL_ISUPPORTS
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JSObject* GetJSObject() { return mJSObject; }
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private:
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~JSObjectHolder() {}
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JS::PersistentRooted<JSObject*> mJSObject;
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};
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} // namespace mozilla
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#endif // mozilla_JSObjectHolder_h
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