chromium/third_party/dawn/src/dawn/wire/server/ObjectStorage.h

// Copyright 2019 The Dawn & Tint Authors
//
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// 1. Redistributions of source code must retain the above copyright notice, this
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//    this list of conditions and the following disclaimer in the documentation
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#ifndef SRC_DAWN_WIRE_SERVER_OBJECTSTORAGE_H_
#define SRC_DAWN_WIRE_SERVER_OBJECTSTORAGE_H_

#include <algorithm>
#include <map>
#include <memory>
#include <utility>
#include <vector>

#include "absl/container/flat_hash_set.h"
#include "dawn/wire/WireCmd_autogen.h"
#include "dawn/wire/WireServer.h"
#include "partition_alloc/pointers/raw_ptr.h"

namespace dawn::wire::server {

// Whether this object has been allocated, or reserved for async object creation.
// Used by the KnownObjects queries
enum class AllocationState : uint32_t { … };

template <typename T>
struct ObjectDataBase { … };

// Stores what the backend knows about the type.
template <typename T>
struct ObjectData : public ObjectDataBase<T> { … };

enum class BufferMapWriteState { … };

template <>
struct ObjectData<WGPUBuffer> : public ObjectDataBase<WGPUBuffer> { … };

struct DeviceInfo { … };

template <>
struct ObjectData<WGPUDevice> : public ObjectDataBase<WGPUDevice> { … };

// Information of both an ID and an object data for use as a shorthand in doers. Reserved objects
// are guaranteed to have been reserved, but not guaranteed to be backed by a valid backend handle.
template <typename T>
struct Reserved { … };

// Information of both an ID and an object data for use as a shorthand in doers. Known objects are
// guaranteed to be backed by a valid backend handle.
template <typename T>
struct Known { … };

// Keeps track of the mapping between client IDs and backend objects.
template <typename T>
class KnownObjectsBase { … };

template <typename T>
class KnownObjects : public KnownObjectsBase<T> { … };

template <>
class KnownObjects<WGPUDevice> : public KnownObjectsBase<WGPUDevice> { … };

}  // namespace dawn::wire::server

#endif  // SRC_DAWN_WIRE_SERVER_OBJECTSTORAGE_H_