godot/thirdparty/openxr/src/loader/loader_instance.hpp

// Copyright (c) 2017-2024, The Khronos Group Inc.
// Copyright (c) 2017-2019 Valve Corporation
// Copyright (c) 2017-2019 LunarG, Inc.
//
// SPDX-License-Identifier: Apache-2.0 OR MIT
//
// Initial Author: Mark Young <[email protected]>
//

#pragma once

#include "extra_algorithms.h"

#include <openxr/openxr.h>
#include <openxr/openxr_loader_negotiation.h>

#include <array>
#include <cmath>
#include <memory>
#include <mutex>
#include <string>
#include <unordered_map>
#include <vector>

class ApiLayerInterface;
struct XrGeneratedDispatchTableCore;
class LoaderInstance;

// Manage the single loader instance that is available.
namespace ActiveLoaderInstance {
// Set the active loader instance. This will fail if there is already an active loader instance.
XrResult Set(std::unique_ptr<LoaderInstance> loader_instance, const char* log_function_name);

// Returns true if there is an active loader instance.
bool IsAvailable();

// Get the active LoaderInstance.
XrResult Get(LoaderInstance** loader_instance, const char* log_function_name);

// Destroy the currently active LoaderInstance if there is one. This will make the loader able to create a new XrInstance if needed.
void Remove();
};  // namespace ActiveLoaderInstance

// Manages information needed by the loader for an XrInstance, such as what extensions are available and the dispatch table.
class LoaderInstance { … };