mirror of
https://github.com/fadden/6502bench.git
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200 lines
6.7 KiB
C#
200 lines
6.7 KiB
C#
/*
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* Copyright 2018 faddenSoft
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Text;
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namespace CommonUtil {
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/// <summary>
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/// Collects timestamps from a series of events. Events may be nested, but may not overlap.
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/// A summary of task durations can be written to a log.
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/// </summary>
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public class TaskTimer {
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// TODO(maybe): create a start/end pair that works with a "using" directive to ensure
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// that a given item is always closed.
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/// <summary>
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/// Timed task info.
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/// </summary>
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private class TimedItem {
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public string mTag;
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public int mIndentLevel;
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public DateTime mStartWhen;
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public DateTime mEndWhen;
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public TimedItem(string tag, int indentLevel) {
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mTag = tag;
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mIndentLevel = indentLevel;
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mStartWhen = DateTime.Now;
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}
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}
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/// <summary>
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/// List of items. They are ordered by when the tasks ended.
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/// </summary>
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private List<TimedItem> mItems = new List<TimedItem>();
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/// <summary>
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/// Indentation level. Cosmetic.
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/// </summary>
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private int mIndentLevel = 0;
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/// <summary>
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/// Place where next record is to be inserted.
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///
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/// We keep inserting records ahead of whatever we inserted last, only advancing
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/// the insertion point when we close a record. Essentially a stack that moves
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/// forward when you pop() instead of removing the element. This lets us handle
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/// nested tasks correctly.
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/// </summary>
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private int mInsertPoint = 0;
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/// <summary>
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/// Resets object to initial state.
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/// </summary>
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public void Clear() {
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mItems.Clear();
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mIndentLevel = mInsertPoint = 0;
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}
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/// <summary>
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/// Adds a start record for a task.
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/// </summary>
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/// <param name="tag">Task tag.</param>
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public void StartTask(string tag) {
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TimedItem ti = new TimedItem(tag, mIndentLevel);
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mItems.Insert(mInsertPoint, ti);
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mIndentLevel++;
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}
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/// <summary>
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/// Closes out a record. The tag must match the most recently started task.
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/// </summary>
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/// <param name="tag">Task tag.</param>
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public void EndTask(string tag) {
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TimedItem lastItem = mItems[mInsertPoint];
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if (lastItem.mTag != tag) {
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Debug.WriteLine("ERROR: tag mismatch: " + tag + " vs. " + lastItem.mTag);
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Debug.Assert(false);
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return;
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}
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lastItem.mEndWhen = DateTime.Now;
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mIndentLevel--;
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mInsertPoint++;
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Debug.Assert(mIndentLevel >= 0);
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}
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/// <summary>
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/// Prints the timing data into a log object.
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/// </summary>
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/// <param name="log">Output destination.</param>
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/// <param name="msg">Header message.</param>
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public void DumpTimes(string msg, DebugLog log) {
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if (mItems.Count == 0) {
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return;
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}
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if (!string.IsNullOrEmpty(msg)) {
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log.LogI(msg);
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}
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StringBuilder sb = new StringBuilder();
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int lastIndent = 0;
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foreach (TimedItem ti in mItems) {
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sb.Clear();
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FormatItem(ti, ref lastIndent, sb);
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log.LogI(sb.ToString());
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}
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//DateTime firstStart = mItems[0].mStartWhen;
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//DateTime lastEnd = mItems[mItems.Count - 1].mEndWhen;
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//log.LogI(" Total: " + (lastEnd - firstStart).TotalMilliseconds + " ms");
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}
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/// <summary>
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/// Prints the timing data into the debug log.
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/// </summary>
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/// <param name="msg">Header message.</param>
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public void DumpTimes(string msg) {
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if (mItems.Count == 0) {
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return;
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}
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if (!string.IsNullOrEmpty(msg)) {
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Debug.WriteLine(msg);
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}
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StringBuilder sb = new StringBuilder();
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int lastIndent = 0;
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foreach (TimedItem ti in mItems) {
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sb.Clear();
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FormatItem(ti, ref lastIndent, sb);
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Debug.WriteLine(sb.ToString());
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}
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}
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/// <summary>
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/// Prints the timing data into a string with newlines.
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/// </summary>
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/// <param name="log">Output destination.</param>
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/// <param name="msg">Header message.</param>
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public string DumpToString(string msg) {
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if (mItems.Count == 0) {
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return msg;
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}
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StringBuilder sb = new StringBuilder();
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#if DEBUG
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sb.Append("[NOTE: debug build -- assertions and extra checks are enabled]\r\n\r\n");
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#endif
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if (!string.IsNullOrEmpty(msg)) {
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sb.Append(msg);
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sb.Append("\r\n\r\n");
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}
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int lastIndent = 0;
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foreach (TimedItem ti in mItems) {
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FormatItem(ti, ref lastIndent, sb);
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sb.Append("\r\n");
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}
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return sb.ToString();
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}
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/// <summary>
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/// Formats the specified item, appending it to the StringBuilder.
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/// </summary>
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/// <param name="ti">Item to format.</param>
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/// <param name="lastIndent">Previous indentation level.</param>
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/// <param name="sb">StringBuilder to append to.</param>
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private void FormatItem(TimedItem ti, ref int lastIndent, StringBuilder sb) {
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for (int i = 0; i <= ti.mIndentLevel - 1; i++) {
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sb.Append("| ");
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}
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if (lastIndent < ti.mIndentLevel) {
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//sb.Append("/-");
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sb.Append("/ ");
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} else /*if (lastIndent == ti.mIndentLevel)*/ {
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sb.Append("| ");
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}
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sb.Append(ti.mTag);
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sb.Append(": ");
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sb.Append((ti.mEndWhen - ti.mStartWhen).TotalMilliseconds.ToString());
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sb.Append(" ms");
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lastIndent = ti.mIndentLevel;
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}
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}
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}
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