forked from mirrors/gecko-dev
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 WEBGPU_INSTANCE_PROVIDER_H_
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#define WEBGPU_INSTANCE_PROVIDER_H_
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#include "mozilla/AlreadyAddRefed.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/RefPtr.h"
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class nsCycleCollectionTraversalCallback;
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class nsIGlobalObject;
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namespace mozilla {
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namespace webgpu {
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class Instance;
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class InstanceProvider {
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private:
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nsIGlobalObject* const mGlobal;
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mutable Maybe<RefPtr<Instance>> mInstance;
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protected:
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explicit InstanceProvider(nsIGlobalObject* global);
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virtual ~InstanceProvider();
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public:
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already_AddRefed<Instance> Webgpu() const;
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nsIGlobalObject* GetParentObject() const { return mGlobal; }
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void CcTraverse(nsCycleCollectionTraversalCallback&) const;
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void CcUnlink();
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};
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template <typename T>
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void ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& callback,
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const Maybe<T>& field, const char* name,
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uint32_t flags) {
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if (field) {
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CycleCollectionNoteChild(callback, field.value(), name, flags);
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}
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}
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template <typename T>
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void ImplCycleCollectionUnlink(Maybe<T>& field) {
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field = Nothing();
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}
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} // namespace webgpu
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} // namespace mozilla
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#endif // WEBGPU_INSTANCE_PROVIDER_H_
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