root_inspect_node.h

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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef FLUTTER_SHELL_PLATFORM_FUCHSIA_RUNTIME_DART_UTILS_ROOT_INSPECT_NODE_H_
#define FLUTTER_SHELL_PLATFORM_FUCHSIA_RUNTIME_DART_UTILS_ROOT_INSPECT_NODE_H_
 
#include <lib/inspect/component/cpp/component.h>
#include <lib/sys/cpp/component_context.h>
 
#include <memory>
#include <mutex>
 
namespace dart_utils {
 
// This singleton object offers a way to create a new inspect node under the
// root node in a thread safe way.
//
// Usage notes:
// RootInspectNode::Initialize() must  be invoked once in the program's
// main before trying to obtain a  child node.
class RootInspectNode {
 private:
  RootInspectNode() = default;
  ~RootInspectNode() = default;
 
 public:
  // Initializes the underlying component inspector. Must be invoked at least
  // once before calling CreateRootChild().
  static void Initialize(sys::ComponentContext* context);
 
  // Creates an inspect node which is a child of the component's root inspect
  // node with the provided |name|.
  static inspect::Node CreateRootChild(const std::string& name);
 
  // Gets an instance to the component's inspector.
  static inspect::Inspector* GetInspector();
 
 private:
  static std::unique_ptr<inspect::ComponentInspector> inspector_;
  static std::mutex mutex_;
};
 
}  // namespace dart_utils
 
#endif  // FLUTTER_SHELL_PLATFORM_FUCHSIA_RUNTIME_DART_UTILS_ROOT_INSPECT_NODE_H_