Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / Util / SystemInfo.cs / 1 / SystemInfo.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Web.Util { internal static class SystemInfo { static int _trueNumberOfProcessors; static internal int GetNumProcessCPUs() { if (_trueNumberOfProcessors == 0) { UnsafeNativeMethods.SYSTEM_INFO si; UnsafeNativeMethods.GetSystemInfo(out si); if (si.dwNumberOfProcessors == 1) { _trueNumberOfProcessors = 1; } else { // KERNEL32.DLL:GetCurrentProcess() always returns -1 under NT // Note: not really a handle (no need to CloseHandle()) IntPtr processHandle = UnsafeNativeMethods.INVALID_HANDLE_VALUE; IntPtr processAffinityMask; IntPtr systemAffinityMask; int returnCode = UnsafeNativeMethods.GetProcessAffinityMask( processHandle, out processAffinityMask, out systemAffinityMask); if (returnCode == 0) { _trueNumberOfProcessors = 1; } else { // if cpu affinity is set to a single processor busy waiting is a waste of time int numProcessors = 0; if (IntPtr.Size == 4) { uint mask = (uint) processAffinityMask; for (; mask != 0; mask >>= 1) { if ((mask & 1) == 1) { ++numProcessors; } } } else { ulong mask = (ulong) processAffinityMask; for (; mask != 0; mask >>= 1) { if ((mask & 1) == 1) { ++numProcessors; } } } _trueNumberOfProcessors = numProcessors; } } } Debug.Assert(_trueNumberOfProcessors > 0); return _trueNumberOfProcessors; } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- DefaultParameterValueAttribute.cs
- TripleDESCryptoServiceProvider.cs
- ListViewContainer.cs
- QilTargetType.cs
- Size3D.cs
- LazyTextWriterCreator.cs
- HtmlWindowCollection.cs
- SendMessageRecord.cs
- CalendarItem.cs
- PointKeyFrameCollection.cs
- InputLangChangeRequestEvent.cs
- QilParameter.cs
- AnimatedTypeHelpers.cs
- AssociationSetEnd.cs
- GeneratedCodeAttribute.cs
- CreateParams.cs
- HighContrastHelper.cs
- ConsoleCancelEventArgs.cs
- ISAPIApplicationHost.cs
- MetadataUtilsSmi.cs
- SoapIgnoreAttribute.cs
- XmlIlTypeHelper.cs
- PackWebRequest.cs
- EncodingNLS.cs
- TypeSystemHelpers.cs
- XpsSerializationException.cs
- GrammarBuilderRuleRef.cs
- DataPager.cs
- DEREncoding.cs
- AdornerHitTestResult.cs
- DateTimeOffsetAdapter.cs
- ReferenceConverter.cs
- EntryPointNotFoundException.cs
- SecurityPermission.cs
- PropertyTab.cs
- LockRenewalTask.cs
- xmlfixedPageInfo.cs
- FixUpCollection.cs
- JoinElimination.cs
- HyperLink.cs
- WebPartsSection.cs
- HttpRequest.cs
- ListViewDeletedEventArgs.cs
- SpecialFolderEnumConverter.cs
- HttpFileCollection.cs
- DataView.cs
- HtmlFormParameterReader.cs
- TimeoutTimer.cs
- RequiredAttributeAttribute.cs
- ImageListDesigner.cs
- DesignerValidationSummaryAdapter.cs
- TCPClient.cs
- BitmapEffectInputConnector.cs
- StdValidatorsAndConverters.cs
- HttpModuleActionCollection.cs
- GlobalizationSection.cs
- FormsIdentity.cs
- DbFunctionCommandTree.cs
- TargetConverter.cs
- Processor.cs
- ColorContext.cs
- GenerateTemporaryTargetAssembly.cs
- FlowStep.cs
- ProviderConnectionPoint.cs
- TempFiles.cs
- NameTable.cs
- DropShadowBitmapEffect.cs
- Rectangle.cs
- BamlLocalizabilityResolver.cs
- Binding.cs
- MenuDesigner.cs
- MembershipUser.cs
- MatrixAnimationUsingKeyFrames.cs
- ShaderEffect.cs
- AttributeExtensions.cs
- BaseValidator.cs
- DbInsertCommandTree.cs
- TemplateApplicationHelper.cs
- NullableFloatSumAggregationOperator.cs
- ADConnectionHelper.cs
- PageFunction.cs
- Point4D.cs
- ServiceOperationUIEditor.cs
- ConnectorMovedEventArgs.cs
- SQLConvert.cs
- EdmConstants.cs
- StateMachineWorkflow.cs
- XsdBuilder.cs
- HierarchicalDataSourceConverter.cs
- ApplicationFileCodeDomTreeGenerator.cs
- EventHandlersStore.cs
- PointUtil.cs
- RoutedCommand.cs
- latinshape.cs
- NativeMethodsOther.cs
- TaskHelper.cs
- MouseDevice.cs
- WeakEventTable.cs
- PartialTrustHelpers.cs
- BasicHttpSecurity.cs