moel@344: /*
moel@344:  
moel@344:   This Source Code Form is subject to the terms of the Mozilla Public
moel@344:   License, v. 2.0. If a copy of the MPL was not distributed with this
moel@344:   file, You can obtain one at http://mozilla.org/MPL/2.0/.
moel@344:  
moel@432:   Copyright (C) 2010-2014 Michael Möller <mmoeller@openhardwaremonitor.org>
moel@344: 	
moel@238: */
moel@238: 
moel@238: using System;
moel@238: using System.Runtime.InteropServices;
moel@238: 
moel@238: namespace OpenHardwareMonitor.Hardware {
moel@238:   
moel@238:   internal static class ThreadAffinity {
moel@238:   
moel@238:     public static ulong Set(ulong mask) { 
moel@238:       if (mask == 0)
moel@238:         return 0;
moel@238:         
moel@238:       int p = (int)Environment.OSVersion.Platform;
moel@238:       if ((p == 4) || (p == 128)) { // Unix
moel@238:         ulong result = 0;
moel@238:         if (NativeMethods.sched_getaffinity(0, (IntPtr)Marshal.SizeOf(result), 
moel@238:           ref result) != 0)          
moel@238:           return 0;
moel@238:         if (NativeMethods.sched_setaffinity(0, (IntPtr)Marshal.SizeOf(mask), 
moel@238:           ref mask) != 0)
moel@238:           return 0;
moel@238:         return result;
moel@432:       } else { // Windows
moel@432:         UIntPtr uIntPtrMask;
moel@432:         try {
moel@432:           uIntPtrMask = (UIntPtr)mask;
moel@432:         } catch (OverflowException) {
moel@432:           throw new ArgumentOutOfRangeException("mask");
moel@432:         }
moel@432:         return (ulong)NativeMethods.SetThreadAffinityMask(
moel@432:           NativeMethods.GetCurrentThread(), uIntPtrMask);
moel@238:       }
moel@238:     }
moel@238:   
moel@238:     private static class NativeMethods {      
moel@238:       private const string KERNEL = "kernel32.dll";
moel@238: 
moel@238:       [DllImport(KERNEL, CallingConvention = CallingConvention.Winapi)]
moel@238:       public static extern UIntPtr
moel@238:         SetThreadAffinityMask(IntPtr handle, UIntPtr mask);
moel@238: 
moel@238:       [DllImport(KERNEL, CallingConvention = CallingConvention.Winapi)]
moel@238:       public static extern IntPtr GetCurrentThread();       
moel@238:       
moel@238:       private const string LIBC = "libc";
moel@238:       
moel@238:       [DllImport(LIBC)]
moel@238:       public static extern int sched_getaffinity(int pid, IntPtr maskSize,
moel@238:         ref ulong mask);
moel@238:       
moel@238:       [DllImport(LIBC)]
moel@238:       public static extern int sched_setaffinity(int pid, IntPtr maskSize,
moel@238:         ref ulong mask);  
moel@238:     }  
moel@238:   }
moel@238: }
moel@238: