gecko-dev/dom/webgpu/InstanceProvider.h

61 строка
1.5 KiB
C++

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