blob: 8f110a18c42f7b969d09750a05d6b22ef319fb08 [file] [log] [blame]
// Copyright 2018 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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
#include "dawn/common/LinkedList.h"
#include "dawn/common/RefCounted.h"
#include "dawn/native/Forward.h"
#include <string>
namespace dawn::native {
class DeviceBase;
class ObjectBase : public RefCounted {
struct ErrorTag {};
static constexpr ErrorTag kError = {};
explicit ObjectBase(DeviceBase* device);
ObjectBase(DeviceBase* device, ErrorTag tag);
DeviceBase* GetDevice() const;
bool IsError() const;
// Pointer to owning device.
DeviceBase* mDevice;
class ApiObjectBase : public ObjectBase, public LinkNode<ApiObjectBase> {
struct LabelNotImplementedTag {};
static constexpr LabelNotImplementedTag kLabelNotImplemented = {};
struct UntrackedByDeviceTag {};
static constexpr UntrackedByDeviceTag kUntrackedByDevice = {};
ApiObjectBase(DeviceBase* device, LabelNotImplementedTag tag);
ApiObjectBase(DeviceBase* device, const char* label);
ApiObjectBase(DeviceBase* device, ErrorTag tag);
~ApiObjectBase() override;
virtual ObjectType GetType() const = 0;
const std::string& GetLabel() const;
// The ApiObjectBase is considered alive if it is tracked in a respective linked list owned
// by the owning device.
bool IsAlive() const;
// This needs to be public because it can be called from the device owning the object.
void Destroy();
// Dawn API
void APISetLabel(const char* label);
// Overriding of the RefCounted's DeleteThis function ensures that instances of objects
// always call their derived class implementation of Destroy prior to the derived
// class being destroyed. This guarantees that when ApiObjects' reference counts drop to 0,
// then the underlying backend's Destroy calls are executed. We cannot naively put the call
// to Destroy in the destructor of this class because it calls DestroyImpl
// which is a virtual function often implemented in the Derived class which would already
// have been destroyed by the time ApiObject's destructor is called by C++'s destruction
// order. Note that some classes like BindGroup may override the DeleteThis function again,
// and they should ensure that their overriding versions call this underlying version
// somewhere.
void DeleteThis() override;
void TrackInDevice();
// Sub-classes may override this function multiple times. Whenever overriding this function,
// however, users should be sure to call their parent's version in the new override to make
// sure that all destroy functionality is kept. This function is guaranteed to only be
// called once through the exposed Destroy function.
virtual void DestroyImpl() = 0;
virtual void SetLabelImpl();
std::string mLabel;
} // namespace dawn::native