| // Copyright 2021 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_GRAPH_NODE_STATE_H_ |
| #define COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_GRAPH_NODE_STATE_H_ |
| |
| namespace performance_manager { |
| |
| // The state of a node. Nodes transition from the states linearly from top |
| // to bottom. For the full lifecycle of the node, see class comments on |
| // NodeBase. |
| enum class NodeState { |
| // The node is in an uninitialized state, and does not belong to a graph. This |
| // is the state of a newly constructed node, and one that has just been |
| // removed from a graph but not yet destroyed. |
| kNotInGraph, |
| |
| // The node is initializing. Making property changes is fine, but no |
| // notifications should be dispatched. This state is only seen by node |
| // implementations and will never be visible via the public API. |
| kInitializing, |
| |
| // The node is being added to the graph. No property changes or notifications |
| // are permitted. |
| kJoiningGraph, |
| |
| // The node is active in the graph. |
| kActiveInGraph, |
| |
| // The node is being removed from the graph. No property changes or |
| // notifications are permitted. |
| kLeavingGraph |
| }; |
| |
| } // namespace performance_manager |
| |
| #endif // COMPONENTS_PERFORMANCE_MANAGER_PUBLIC_GRAPH_NODE_STATE_H_ |
