Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / 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
- AgileSafeNativeMemoryHandle.cs
- CommonDialog.cs
- AutoResetEvent.cs
- CodeMemberMethod.cs
- SimpleType.cs
- DashStyle.cs
- ProfileWorkflowElement.cs
- x509utils.cs
- XmlSchema.cs
- HTMLTagNameToTypeMapper.cs
- MethodToken.cs
- SynchronizedPool.cs
- GeneralTransformGroup.cs
- ToolBarOverflowPanel.cs
- SelectionWordBreaker.cs
- StringTraceRecord.cs
- DelayedRegex.cs
- EntityTypeBase.cs
- formatstringdialog.cs
- LogEntrySerializationException.cs
- WeakReferenceList.cs
- AnonymousIdentificationSection.cs
- Queue.cs
- EventBookmark.cs
- AssemblyAssociatedContentFileAttribute.cs
- X509Utils.cs
- complextypematerializer.cs
- LexicalChunk.cs
- Win32Native.cs
- WindowsGraphics2.cs
- ZipIOCentralDirectoryBlock.cs
- CommandManager.cs
- DesignerSerializerAttribute.cs
- ConfigurationValue.cs
- WindowsGraphics2.cs
- PersistenceException.cs
- SchemaSetCompiler.cs
- Padding.cs
- BlurBitmapEffect.cs
- RTLAwareMessageBox.cs
- FontStyleConverter.cs
- Transform3DGroup.cs
- BaseComponentEditor.cs
- TextCharacters.cs
- ObjectConverter.cs
- TypeSource.cs
- XmlParserContext.cs
- TokenBasedSetEnumerator.cs
- NumberAction.cs
- _HeaderInfoTable.cs
- DataGridViewBindingCompleteEventArgs.cs
- VisualTreeHelper.cs
- TreeNodeConverter.cs
- ActivityCodeDomSerializationManager.cs
- InsufficientMemoryException.cs
- QilVisitor.cs
- DefinitionBase.cs
- ConstructorNeedsTagAttribute.cs
- LineSegment.cs
- TreeNodeStyleCollection.cs
- MouseOverProperty.cs
- NonVisualControlAttribute.cs
- LogLogRecordEnumerator.cs
- ScriptingRoleServiceSection.cs
- AnimationException.cs
- XPathAxisIterator.cs
- CallInfo.cs
- RowUpdatingEventArgs.cs
- ResolveNameEventArgs.cs
- RotationValidation.cs
- DropShadowBitmapEffect.cs
- peersecuritysettings.cs
- DotNetATv1WindowsLogEntrySerializer.cs
- DataGridPreparingCellForEditEventArgs.cs
- WindowsStartMenu.cs
- MouseActionConverter.cs
- ValidationHelper.cs
- QueryModel.cs
- DiscoveryClientChannelBase.cs
- TemplateNameScope.cs
- CaseInsensitiveOrdinalStringComparer.cs
- ExclusiveTcpListener.cs
- CodeIdentifiers.cs
- ExpressionNormalizer.cs
- CharAnimationUsingKeyFrames.cs
- AppSettingsExpressionBuilder.cs
- XmlSchemaSearchPattern.cs
- Model3D.cs
- ParseNumbers.cs
- StrongNameUtility.cs
- HttpServerVarsCollection.cs
- SqlGatherProducedAliases.cs
- ZipIOCentralDirectoryFileHeader.cs
- ObjectParameter.cs
- LifetimeServices.cs
- SerializationSectionGroup.cs
- Int16AnimationBase.cs
- Label.cs
- XmlSchemaAppInfo.cs
- Error.cs