mirror of
https://github.com/godotengine/godot
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696346f4cc
Co-authored-by: Gordon A Macpherson <gordon.a.macpherson@gmail.com> Co-authored-by: Rémi Verschelde <rverschelde@gmail.com>
219 lines
6.2 KiB
C++
219 lines
6.2 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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// ----------------------------------------------------------------------------
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// Copyright 2021-2022 Arm Limited
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy
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// of the License at:
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations
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// under the License.
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// ----------------------------------------------------------------------------
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/**
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* @brief This module provides a set of diagnostic tracing utilities.
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*
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* Overview
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* ========
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*
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* The built-in diagnostic trace tool generates a hierarchical JSON tree structure. The tree
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* hierarchy contains three levels:
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*
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* - block
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* - pass
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* - candidate
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*
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* One block node exists for each compressed block in the image. One pass node exists for each major
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* pass (N partition, M planes, O components) applied to a block. One candidate node exists for each
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* encoding candidate trialed for a pass.
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*
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* Each node contains both the hierarchy but also a number of attributes which explain the behavior.
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* For example, the block node contains the block coordinates in the image, the pass explains the
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* pass configuration, and the candidate will explain the candidate encoding such as weight
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* decimation, refinement error, etc.
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*
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* Trace Nodes are designed as scope-managed C++ objects with stack-like push/pop behavior.
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* Constructing a trace node on the stack will automatically add it to the current node as a child,
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* and then make it the current node. Destroying the current node will pop the stack and set the
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* parent to the current node. This provides a robust mechanism for ensuring reliable nesting in the
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* tree structure.
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*
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* A set of utility macros are provided to add attribute annotations to the current trace node.
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*
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* Usage
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* =====
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*
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* Create Trace Nodes on the stack using the @c TRACE_NODE() macro. This will compile-out completely
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* in builds with diagnostics disabled.
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*
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* Add annotations to the current trace node using the @c trace_add_data() macro. This will
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* similarly compile out completely in builds with diagnostics disabled.
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*
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* If you need to add additional code to support diagnostics-only behavior wrap
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* it in preprocessor guards:
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*
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* #if defined(ASTCENC_DIAGNOSTICS)
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* #endif
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*/
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#ifndef ASTCENC_DIAGNOSTIC_TRACE_INCLUDED
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#define ASTCENC_DIAGNOSTIC_TRACE_INCLUDED
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#if defined(ASTCENC_DIAGNOSTICS)
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#include <iostream>
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#include <fstream>
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#include <vector>
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/**
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* @brief Class representing a single node in the trace hierarchy.
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*/
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class TraceNode
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{
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public:
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/**
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* @brief Construct a new node.
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*
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* Constructing a node will push to the the top of the stack, automatically making it a child of
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* the current node, and then setting it to become the current node.
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*
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* @param format The format template for the node name.
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* @param ... The format parameters.
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*/
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TraceNode(const char* format, ...);
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/**
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* @brief Add an attribute to this node.
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*
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* Note that no quoting is applied to the @c value, so if quoting is needed it must be done by
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* the caller.
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*
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* @param type The type of the attribute.
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* @param key The key of the attribute.
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* @param value The value of the attribute.
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*/
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void add_attrib(std::string type, std::string key, std::string value);
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/**
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* @brief Destroy this node.
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*
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* Destroying a node will pop it from the top of the stack, making its parent the current node.
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* It is invalid behavior to destroy a node that is not the current node; usage must conform to
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* stack push-pop semantics.
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*/
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~TraceNode();
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/**
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* @brief The number of attributes and child nodes in this node.
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*/
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unsigned int m_attrib_count { 0 };
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};
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/**
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* @brief Class representing the trace log file being written.
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*/
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class TraceLog
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{
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public:
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/**
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* @brief Create a new trace log.
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*
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* The trace log is global; there can be only one at a time.
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*
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* @param file_name The name of the file to write.
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*/
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TraceLog(const char* file_name);
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/**
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* @brief Detroy the trace log.
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*
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* Trace logs MUST be cleanly destroyed to ensure the file gets written.
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*/
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~TraceLog();
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/**
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* @brief Get the current child node.
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*
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* @return The current leaf node.
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*/
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TraceNode* get_current_leaf();
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/**
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* @brief Get the stack depth of the current child node.
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*
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* @return The current leaf node stack depth.
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*/
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size_t get_depth();
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/**
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* @brief The file stream to write to.
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*/
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std::ofstream m_file;
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/**
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* @brief The stack of nodes (newest at the back).
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*/
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std::vector<TraceNode*> m_stack;
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private:
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/**
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* @brief The root node in the JSON file.
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*/
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TraceNode* m_root;
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};
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/**
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* @brief Utility macro to create a trace node on the stack.
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*
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* @param name The variable name to use.
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* @param ... The name template and format parameters.
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*/
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#define TRACE_NODE(name, ...) TraceNode name(__VA_ARGS__);
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/**
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* @brief Add a string annotation to the current node.
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*
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* @param key The name of the attribute.
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* @param format The format template for the attribute value.
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* @param ... The format parameters.
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*/
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void trace_add_data(const char* key, const char* format, ...);
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/**
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* @brief Add a float annotation to the current node.
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*
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* @param key The name of the attribute.
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* @param value The value of the attribute.
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*/
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void trace_add_data(const char* key, float value);
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/**
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* @brief Add an integer annotation to the current node.
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*
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* @param key The name of the attribute.
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* @param value The value of the attribute.
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*/
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void trace_add_data(const char* key, int value);
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/**
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* @brief Add an unsigned integer annotation to the current node.
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*
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* @param key The name of the attribute.
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* @param value The value of the attribute.
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*/
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void trace_add_data(const char* key, unsigned int value);
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#else
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#define TRACE_NODE(name, ...)
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#define trace_add_data(...)
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#endif
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#endif
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