Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Sys / System / Threading / Semaphore.cs / 1 / Semaphore.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace System.Threading { using System.IO; using System.IO.Ports; using Microsoft.Win32; using Microsoft.Win32.SafeHandles; using System.Runtime.InteropServices; using System.Threading; using System.Security.Permissions; #if !FEATURE_PAL using System.Security.AccessControl; #endif using System.Runtime.Versioning; using System.Runtime.ConstrainedExecution; [HostProtection(Synchronization=true, ExternalThreading=true)] [ComVisibleAttribute(false)] public sealed class Semaphore: WaitHandle { private static int MAX_PATH = 260; // creates a nameless semaphore object // Win32 only takes maximum count of Int32.MaxValue [ResourceExposure(ResourceScope.None)] [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)] public Semaphore(int initialCount, int maximumCount) : this(initialCount,maximumCount,null){} [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public Semaphore(int initialCount, int maximumCount, string name) { if (initialCount < 0) { throw new ArgumentOutOfRangeException("initialCount", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if (maximumCount < 1) { throw new ArgumentOutOfRangeException("maximumCount", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if (initialCount > maximumCount) { throw new ArgumentException(SR.GetString(SR.Argument_SemaphoreInitialMaximum)); } if(null != name && MAX_PATH < name.Length) { throw new ArgumentException(SR.GetString(SR.Argument_WaitHandleNameTooLong)); } SafeWaitHandle myHandle = SafeNativeMethods.CreateSemaphore(null, initialCount, maximumCount, name); if (myHandle.IsInvalid) { int errorCode = Marshal.GetLastWin32Error(); if(null != name && 0 != name.Length && NativeMethods.ERROR_INVALID_HANDLE == errorCode) throw new WaitHandleCannotBeOpenedException(SR.GetString(SR.WaitHandleCannotBeOpenedException_InvalidHandle,name)); InternalResources.WinIOError(); } this.SafeWaitHandle = myHandle; } [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public Semaphore(int initialCount, int maximumCount, string name, out bool createdNew) #if !FEATURE_PAL : this(initialCount, maximumCount, name, out createdNew, null) { } [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public unsafe Semaphore(int initialCount, int maximumCount, string name, out bool createdNew, SemaphoreSecurity semaphoreSecurity) #endif { if (initialCount < 0) { throw new ArgumentOutOfRangeException("initialCount", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if (maximumCount < 1) { throw new ArgumentOutOfRangeException("maximumCount", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if (initialCount > maximumCount) { throw new ArgumentException(SR.GetString(SR.Argument_SemaphoreInitialMaximum)); } if(null != name && MAX_PATH < name.Length) { throw new ArgumentException(SR.GetString(SR.Argument_WaitHandleNameTooLong)); } SafeWaitHandle myHandle; #if !FEATURE_PAL // For ACL's, get the security descriptor from the SemaphoreSecurity. if (semaphoreSecurity != null) { NativeMethods.SECURITY_ATTRIBUTES secAttrs = null; secAttrs = new NativeMethods.SECURITY_ATTRIBUTES(); secAttrs.nLength = (int)Marshal.SizeOf(secAttrs); byte[] sd = semaphoreSecurity.GetSecurityDescriptorBinaryForm(); fixed(byte* pSecDescriptor = sd) { secAttrs.lpSecurityDescriptor = new SafeLocalMemHandle((IntPtr) pSecDescriptor, false); myHandle = SafeNativeMethods.CreateSemaphore(secAttrs, initialCount, maximumCount, name); } } else { #endif myHandle = SafeNativeMethods.CreateSemaphore(null, initialCount, maximumCount, name); #if !FEATURE_PAL } #endif int errorCode = Marshal.GetLastWin32Error(); if (myHandle.IsInvalid) { if(null != name && 0 != name.Length && NativeMethods.ERROR_INVALID_HANDLE == errorCode) throw new WaitHandleCannotBeOpenedException(SR.GetString(SR.WaitHandleCannotBeOpenedException_InvalidHandle,name)); InternalResources.WinIOError(); } createdNew = errorCode != NativeMethods.ERROR_ALREADY_EXISTS; this.SafeWaitHandle = myHandle; } private Semaphore(SafeWaitHandle handle) { this.SafeWaitHandle = handle; } [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public static Semaphore OpenExisting(string name) { #if !FEATURE_PAL return OpenExisting(name, SemaphoreRights.Modify | SemaphoreRights.Synchronize); } [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public static Semaphore OpenExisting(string name, SemaphoreRights rights) { #endif // !FEATURE_PAL if (name == null) { throw new ArgumentNullException("name"); } if(name.Length == 0) { throw new ArgumentException(SR.GetString(SR.InvalidNullEmptyArgument, "name"), "name"); } if(null != name && MAX_PATH < name.Length) { throw new ArgumentException(SR.GetString(SR.Argument_WaitHandleNameTooLong)); } //Pass false to OpenSemaphore to prevent inheritedHandles #if FEATURE_PAL SafeWaitHandle myHandle = SafeNativeMethods.OpenSemaphore(Win32Native.SEMAPHORE_MODIFY_STATE | Win32Native.SYNCHRONIZE, false, name); #else SafeWaitHandle myHandle = SafeNativeMethods.OpenSemaphore((int) rights, false, name); #endif if (myHandle.IsInvalid) { int errorCode = Marshal.GetLastWin32Error(); if (NativeMethods.ERROR_FILE_NOT_FOUND == errorCode || NativeMethods.ERROR_INVALID_NAME == errorCode) throw new WaitHandleCannotBeOpenedException(); if (null != name && 0 != name.Length && NativeMethods.ERROR_INVALID_HANDLE == errorCode) throw new WaitHandleCannotBeOpenedException(SR.GetString(SR.WaitHandleCannotBeOpenedException_InvalidHandle,name)); //this is for passed through NativeMethods Errors InternalResources.WinIOError(); } return new Semaphore(myHandle); } // increase the count on a semaphore, returns previous count [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] [PrePrepareMethod] public int Release() { return Release(1); } // increase the count on a semaphore, returns previous count [ResourceExposure(ResourceScope.None)] [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] public int Release(int releaseCount) { if (releaseCount < 1) { throw new ArgumentOutOfRangeException("releaseCount", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } int previousCount; //If ReleaseSempahore returns false when the specified value would cause // the semaphore's count to exceed the maximum count set when Semaphore was created //Non-Zero return if (!SafeNativeMethods.ReleaseSemaphore(SafeWaitHandle, releaseCount, out previousCount)) { throw new SemaphoreFullException(); } return previousCount; } #if !FEATURE_PAL public SemaphoreSecurity GetAccessControl() { return new SemaphoreSecurity(SafeWaitHandle, AccessControlSections.Access | AccessControlSections.Owner | AccessControlSections.Group); } public void SetAccessControl(SemaphoreSecurity semaphoreSecurity) { if (semaphoreSecurity == null) throw new ArgumentNullException("semaphoreSecurity"); semaphoreSecurity.Persist(SafeWaitHandle); } #endif } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== namespace System.Threading { using System.IO; using System.IO.Ports; using Microsoft.Win32; using Microsoft.Win32.SafeHandles; using System.Runtime.InteropServices; using System.Threading; using System.Security.Permissions; #if !FEATURE_PAL using System.Security.AccessControl; #endif using System.Runtime.Versioning; using System.Runtime.ConstrainedExecution; [HostProtection(Synchronization=true, ExternalThreading=true)] [ComVisibleAttribute(false)] public sealed class Semaphore: WaitHandle { private static int MAX_PATH = 260; // creates a nameless semaphore object // Win32 only takes maximum count of Int32.MaxValue [ResourceExposure(ResourceScope.None)] [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)] public Semaphore(int initialCount, int maximumCount) : this(initialCount,maximumCount,null){} [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public Semaphore(int initialCount, int maximumCount, string name) { if (initialCount < 0) { throw new ArgumentOutOfRangeException("initialCount", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if (maximumCount < 1) { throw new ArgumentOutOfRangeException("maximumCount", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if (initialCount > maximumCount) { throw new ArgumentException(SR.GetString(SR.Argument_SemaphoreInitialMaximum)); } if(null != name && MAX_PATH < name.Length) { throw new ArgumentException(SR.GetString(SR.Argument_WaitHandleNameTooLong)); } SafeWaitHandle myHandle = SafeNativeMethods.CreateSemaphore(null, initialCount, maximumCount, name); if (myHandle.IsInvalid) { int errorCode = Marshal.GetLastWin32Error(); if(null != name && 0 != name.Length && NativeMethods.ERROR_INVALID_HANDLE == errorCode) throw new WaitHandleCannotBeOpenedException(SR.GetString(SR.WaitHandleCannotBeOpenedException_InvalidHandle,name)); InternalResources.WinIOError(); } this.SafeWaitHandle = myHandle; } [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public Semaphore(int initialCount, int maximumCount, string name, out bool createdNew) #if !FEATURE_PAL : this(initialCount, maximumCount, name, out createdNew, null) { } [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public unsafe Semaphore(int initialCount, int maximumCount, string name, out bool createdNew, SemaphoreSecurity semaphoreSecurity) #endif { if (initialCount < 0) { throw new ArgumentOutOfRangeException("initialCount", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if (maximumCount < 1) { throw new ArgumentOutOfRangeException("maximumCount", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } if (initialCount > maximumCount) { throw new ArgumentException(SR.GetString(SR.Argument_SemaphoreInitialMaximum)); } if(null != name && MAX_PATH < name.Length) { throw new ArgumentException(SR.GetString(SR.Argument_WaitHandleNameTooLong)); } SafeWaitHandle myHandle; #if !FEATURE_PAL // For ACL's, get the security descriptor from the SemaphoreSecurity. if (semaphoreSecurity != null) { NativeMethods.SECURITY_ATTRIBUTES secAttrs = null; secAttrs = new NativeMethods.SECURITY_ATTRIBUTES(); secAttrs.nLength = (int)Marshal.SizeOf(secAttrs); byte[] sd = semaphoreSecurity.GetSecurityDescriptorBinaryForm(); fixed(byte* pSecDescriptor = sd) { secAttrs.lpSecurityDescriptor = new SafeLocalMemHandle((IntPtr) pSecDescriptor, false); myHandle = SafeNativeMethods.CreateSemaphore(secAttrs, initialCount, maximumCount, name); } } else { #endif myHandle = SafeNativeMethods.CreateSemaphore(null, initialCount, maximumCount, name); #if !FEATURE_PAL } #endif int errorCode = Marshal.GetLastWin32Error(); if (myHandle.IsInvalid) { if(null != name && 0 != name.Length && NativeMethods.ERROR_INVALID_HANDLE == errorCode) throw new WaitHandleCannotBeOpenedException(SR.GetString(SR.WaitHandleCannotBeOpenedException_InvalidHandle,name)); InternalResources.WinIOError(); } createdNew = errorCode != NativeMethods.ERROR_ALREADY_EXISTS; this.SafeWaitHandle = myHandle; } private Semaphore(SafeWaitHandle handle) { this.SafeWaitHandle = handle; } [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public static Semaphore OpenExisting(string name) { #if !FEATURE_PAL return OpenExisting(name, SemaphoreRights.Modify | SemaphoreRights.Synchronize); } [SecurityPermissionAttribute(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)] [ResourceExposure(ResourceScope.Machine)] [ResourceConsumption(ResourceScope.Machine)] public static Semaphore OpenExisting(string name, SemaphoreRights rights) { #endif // !FEATURE_PAL if (name == null) { throw new ArgumentNullException("name"); } if(name.Length == 0) { throw new ArgumentException(SR.GetString(SR.InvalidNullEmptyArgument, "name"), "name"); } if(null != name && MAX_PATH < name.Length) { throw new ArgumentException(SR.GetString(SR.Argument_WaitHandleNameTooLong)); } //Pass false to OpenSemaphore to prevent inheritedHandles #if FEATURE_PAL SafeWaitHandle myHandle = SafeNativeMethods.OpenSemaphore(Win32Native.SEMAPHORE_MODIFY_STATE | Win32Native.SYNCHRONIZE, false, name); #else SafeWaitHandle myHandle = SafeNativeMethods.OpenSemaphore((int) rights, false, name); #endif if (myHandle.IsInvalid) { int errorCode = Marshal.GetLastWin32Error(); if (NativeMethods.ERROR_FILE_NOT_FOUND == errorCode || NativeMethods.ERROR_INVALID_NAME == errorCode) throw new WaitHandleCannotBeOpenedException(); if (null != name && 0 != name.Length && NativeMethods.ERROR_INVALID_HANDLE == errorCode) throw new WaitHandleCannotBeOpenedException(SR.GetString(SR.WaitHandleCannotBeOpenedException_InvalidHandle,name)); //this is for passed through NativeMethods Errors InternalResources.WinIOError(); } return new Semaphore(myHandle); } // increase the count on a semaphore, returns previous count [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] [PrePrepareMethod] public int Release() { return Release(1); } // increase the count on a semaphore, returns previous count [ResourceExposure(ResourceScope.None)] [ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] public int Release(int releaseCount) { if (releaseCount < 1) { throw new ArgumentOutOfRangeException("releaseCount", SR.GetString(SR.ArgumentOutOfRange_NeedNonNegNumRequired)); } int previousCount; //If ReleaseSempahore returns false when the specified value would cause // the semaphore's count to exceed the maximum count set when Semaphore was created //Non-Zero return if (!SafeNativeMethods.ReleaseSemaphore(SafeWaitHandle, releaseCount, out previousCount)) { throw new SemaphoreFullException(); } return previousCount; } #if !FEATURE_PAL public SemaphoreSecurity GetAccessControl() { return new SemaphoreSecurity(SafeWaitHandle, AccessControlSections.Access | AccessControlSections.Owner | AccessControlSections.Group); } public void SetAccessControl(SemaphoreSecurity semaphoreSecurity) { if (semaphoreSecurity == null) throw new ArgumentNullException("semaphoreSecurity"); semaphoreSecurity.Persist(SafeWaitHandle); } #endif } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ExpressionBuilderCollection.cs
- OdbcParameter.cs
- ManagementObject.cs
- RequiredFieldValidator.cs
- WebBrowser.cs
- PasswordPropertyTextAttribute.cs
- ViewStateAttachedPropertyFeature.cs
- MdiWindowListStrip.cs
- DeviceFiltersSection.cs
- EventRecordWrittenEventArgs.cs
- UniqueConstraint.cs
- DoubleLink.cs
- UrlMappingCollection.cs
- StrongNameMembershipCondition.cs
- MsmqHostedTransportManager.cs
- WebPartConnectionsConnectVerb.cs
- HtmlPageAdapter.cs
- RuntimeConfigLKG.cs
- Help.cs
- HtmlTableRow.cs
- RichTextBoxAutomationPeer.cs
- CryptoKeySecurity.cs
- ProcessProtocolHandler.cs
- ObjectDataSourceWizardForm.cs
- GeneratedView.cs
- CssClassPropertyAttribute.cs
- InputLanguageProfileNotifySink.cs
- GifBitmapEncoder.cs
- TextFormatterContext.cs
- ListItemConverter.cs
- TaiwanLunisolarCalendar.cs
- LoginUtil.cs
- TrackingAnnotationCollection.cs
- AssemblyName.cs
- ByteStorage.cs
- PersonalizableTypeEntry.cs
- NamespaceQuery.cs
- SolidColorBrush.cs
- StringResourceManager.cs
- OlePropertyStructs.cs
- Int32Storage.cs
- ToolStripPanelCell.cs
- ClientSideProviderDescription.cs
- ActivityDesigner.cs
- ArrangedElementCollection.cs
- TextTreeUndo.cs
- AlternationConverter.cs
- JsonStringDataContract.cs
- And.cs
- TreeViewImageIndexConverter.cs
- HandlerBase.cs
- SecurityElement.cs
- Model3DGroup.cs
- ContractNamespaceAttribute.cs
- DbConnectionHelper.cs
- WorkflowElementDialog.cs
- LabelExpression.cs
- DeviceContexts.cs
- MimeFormatter.cs
- CharacterBuffer.cs
- ArgumentOutOfRangeException.cs
- TemplateXamlParser.cs
- XmlnsDefinitionAttribute.cs
- XmlNamespaceDeclarationsAttribute.cs
- SizeConverter.cs
- ToolboxBitmapAttribute.cs
- TraceListeners.cs
- QueueProcessor.cs
- XPathDocument.cs
- _NetRes.cs
- XPathScanner.cs
- BrushMappingModeValidation.cs
- SqlRowUpdatingEvent.cs
- AmbiguousMatchException.cs
- SqlTransaction.cs
- SoapObjectInfo.cs
- DbMetaDataFactory.cs
- ClientApiGenerator.cs
- RequestTimeoutManager.cs
- CacheRequest.cs
- baseshape.cs
- LayoutEngine.cs
- HtmlInputHidden.cs
- PropertyTabChangedEvent.cs
- HandlerWithFactory.cs
- AlgoModule.cs
- SingleAnimationBase.cs
- ValueHandle.cs
- SlipBehavior.cs
- SessionStateModule.cs
- FrameworkTextComposition.cs
- ServiceModelEnumValidatorAttribute.cs
- Context.cs
- CalendarSelectionChangedEventArgs.cs
- OdbcConnectionHandle.cs
- CharAnimationBase.cs
- ExpandoObject.cs
- ReflectPropertyDescriptor.cs
- InputLanguageManager.cs
- FrameworkRichTextComposition.cs