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// Copyright 2020 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SRC_DAWN_COMMON_IOKITREF_H_
#define SRC_DAWN_COMMON_IOKITREF_H_
#include <IOKit/IOKitLib.h>
#include "dawn/common/RefBase.h"
template <typename T>
struct IOKitRefTraits {
static constexpr T kNullValue = IO_OBJECT_NULL;
static void Reference(T value) { IOObjectRetain(value); }
static void Release(T value) { IOObjectRelease(value); }
};
template <typename T>
class IORef : public RefBase<T, IOKitRefTraits<T>> {
public:
using RefBase<T, IOKitRefTraits<T>>::RefBase;
};
template <typename T>
IORef<T> AcquireIORef(T pointee) {
IORef<T> ref;
ref.Acquire(pointee);
return ref;
}
#endif // SRC_DAWN_COMMON_IOKITREF_H_