Created
February 6, 2021 07:38
-
-
Save lazalong/241a34bef0b04a0c0a8cf428958e869b to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| /* | |
| * C# Thread Helper | |
| * Copyright (c) 2021 Steven 'lazalong' Gay | |
| * | |
| * Permission is hereby granted, free of charge, to any person obtaining a copy | |
| * of this software and associated documentation files (the "Software"), to deal | |
| * in the Software without restriction, including without limitation the rights | |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| * copies of the Software, and to permit persons to whom the Software is | |
| * furnished to do so, subject to the following conditions: | |
| * | |
| * The above copyright notice and this permission notice shall be included in all | |
| * copies or substantial portions of the Software. | |
| * | |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
| * SOFTWARE. | |
| */ | |
| using System; | |
| using System.Diagnostics; | |
| using System.Linq; | |
| using System.Runtime.InteropServices; | |
| namespace NetServer | |
| { | |
| public static class ThreadHelper | |
| { | |
| [DllImport("kernel32.dll")] | |
| public static extern int GetCurrentThreadId(); | |
| static readonly Process _currentProcess = null; | |
| static ThreadHelper() | |
| { | |
| if (_currentProcess == null) | |
| _currentProcess = Process.GetCurrentProcess(); | |
| } | |
| // Can be used as offset for subsequent created threads | |
| public static int GetNbThreads() | |
| { | |
| _currentProcess.Refresh(); | |
| return _currentProcess.Threads.Count; | |
| } | |
| public static int GetNbLogicalCores() | |
| { | |
| return Environment.ProcessorCount; | |
| } | |
| // Set the affinity of a thread | |
| // Bind the thread to the 'processNb' process [1-8] in a 8 cores machine | |
| // process.Threads[i + offset].ProcessorAffinity = (IntPtr)(1L << i); | |
| public static void SetAffinity(int threadIndex, int processIndex) | |
| { | |
| Assert.Check(processIndex >= 0 && processIndex <= Environment.ProcessorCount); | |
| #pragma warning disable CA1416 | |
| _currentProcess.Threads[threadIndex].IdealProcessor = processIndex; | |
| if (processIndex == 0) | |
| _currentProcess.Threads[threadIndex].ProcessorAffinity = (IntPtr)(1); | |
| else | |
| _currentProcess.Threads[threadIndex].ProcessorAffinity = (IntPtr)(1L << processIndex); | |
| #pragma warning restore CA1416 | |
| } | |
| public static int GetThreadIndex(int id) | |
| { | |
| int nb = GetNbThreads(); | |
| for (int i = 0; i < nb; i++) | |
| { | |
| if (_currentProcess.Threads[i].Id == id) | |
| return i; | |
| } | |
| return -1; | |
| } | |
| public static ProcessThread CurrentThread | |
| { | |
| get | |
| { | |
| int id = GetCurrentThreadId(); | |
| return | |
| (from ProcessThread th in Process.GetCurrentProcess().Threads | |
| where th.Id == id | |
| select th).Single(); | |
| } | |
| } | |
| public static void PrintAllThreads(int max = 10) | |
| { | |
| int nb = GetNbThreads(); | |
| if (nb > max) nb = max; | |
| Console.WriteLine("Threads:"); | |
| for (int i = 0; i < nb; i++) | |
| { | |
| Console.WriteLine($" {i} : {_currentProcess.Threads[i].Id}"); | |
| } | |
| } | |
| } | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment