Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Threading / Monitor.cs / 1 / Monitor.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== /*============================================================================== ** ** Class: Monitor ** ** ** Purpose: Synchronizes access to a shared resource or region of code in a multi-threaded ** program. ** ** =============================================================================*/ namespace System.Threading { using System; using System.Security.Permissions; using System.Runtime.Remoting; using System.Threading; using System.Runtime.CompilerServices; using System.Runtime.ConstrainedExecution; [HostProtection(Synchronization=true, ExternalThreading=true)] [System.Runtime.InteropServices.ComVisible(true)] public static class Monitor { /*========================================================================= ** Obtain the monitor lock of obj. Will block if another thread holds the lock ** Will not block if the current thread holds the lock, ** however the caller must ensure that the same number of Exit ** calls are made as there were Enter calls. ** ** Exceptions: ArgumentNullException if object is null. =========================================================================*/ [MethodImplAttribute(MethodImplOptions.InternalCall)] public static extern void Enter(Object obj); // This should be made public in a future version. // Use a ref bool instead of out to ensure that unverifiable code must // initialize this value to something. If we used out, the value // could be uninitialized if we threw an exception in our prolog. [MethodImplAttribute(MethodImplOptions.InternalCall)] internal static extern void ReliableEnter(Object obj, ref bool tookLock); /*========================================================================= ** Release the monitor lock. If one or more threads are waiting to acquire the ** lock, and the current thread has executed as many Exits as ** Enters, one of the threads will be unblocked and allowed to proceed. ** ** Exceptions: ArgumentNullException if object is null. ** SynchronizationLockException if the current thread does not ** own the lock. =========================================================================*/ [MethodImplAttribute(MethodImplOptions.InternalCall)] [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] public static extern void Exit(Object obj); /*========================================================================= ** Similar to Enter, but will never block. That is, if the current thread can ** acquire the monitor lock without blocking, it will do so and TRUE will ** be returned. Otherwise FALSE will be returned. ** ** Exceptions: ArgumentNullException if object is null. =========================================================================*/ public static bool TryEnter(Object obj) { return TryEnterTimeout(obj, 0); } /*========================================================================== ** Version of TryEnter that will block, but only up to a timeout period ** expressed in milliseconds. If timeout == Timeout.Infinite the method ** becomes equivalent to Enter. ** ** Exceptions: ArgumentNullException if object is null. ** ArgumentException if timeout < 0. =========================================================================*/ public static bool TryEnter(Object obj, int millisecondsTimeout) { return TryEnterTimeout(obj, millisecondsTimeout); } public static bool TryEnter(Object obj, TimeSpan timeout) { long tm = (long)timeout.TotalMilliseconds; if (tm < -1 || tm > (long) Int32.MaxValue) throw new ArgumentOutOfRangeException("timeout", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegOrNegative1")); return TryEnterTimeout(obj, (int)tm); } [MethodImplAttribute(MethodImplOptions.InternalCall)] private static extern bool TryEnterTimeout(Object obj, int timeout); /*======================================================================= ** Waits for notification from the object (via a Pulse/PulseAll). ** timeout indicates how long to wait before the method returns. ** This method acquires the monitor waithandle for the object ** If this thread holds the monitor lock for the object, it releases it. ** On exit from the method, it obtains the monitor lock back. ** If exitContext is true then the synchronization domain for the context ** (if in a synchronized context) is exited before the wait and reacquired ** ** Exceptions: ArgumentNullException if object is null. ========================================================================*/ [MethodImplAttribute(MethodImplOptions.InternalCall)] private static extern bool ObjWait(bool exitContext, int millisecondsTimeout,Object obj); public static bool Wait(Object obj, int millisecondsTimeout, bool exitContext) { if (obj == null) throw (new ArgumentNullException("obj")); return ObjWait(exitContext, millisecondsTimeout, obj); } public static bool Wait(Object obj, TimeSpan timeout, bool exitContext) { long tm = (long)timeout.TotalMilliseconds; if (tm < -1 || tm > (long) Int32.MaxValue) throw new ArgumentOutOfRangeException("timeout", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegOrNegative1")); return Wait(obj, (int)tm, exitContext); } public static bool Wait(Object obj, int millisecondsTimeout) { return Wait(obj,millisecondsTimeout,false); } public static bool Wait(Object obj, TimeSpan timeout) { long tm = (long)timeout.TotalMilliseconds; if (tm < -1 || tm > (long) Int32.MaxValue) throw new ArgumentOutOfRangeException("timeout", Environment.GetResourceString("ArgumentOutOfRange_NeedNonNegOrNegative1")); return Wait(obj,(int)tm,false); } public static bool Wait(Object obj) { return Wait(obj,Timeout.Infinite,false); } /*======================================================================== ** Sends a notification to a single waiting object. * Exceptions: SynchronizationLockException if this method is not called inside * a synchronized block of code. ========================================================================*/ [MethodImplAttribute(MethodImplOptions.InternalCall)] private static extern void ObjPulse(Object obj); public static void Pulse(Object obj) { if (obj==null) { throw new ArgumentNullException("obj"); } ObjPulse(obj); } /*======================================================================== ** Sends a notification to all waiting objects. ========================================================================*/ [MethodImplAttribute(MethodImplOptions.InternalCall)] private static extern void ObjPulseAll(Object obj); public static void PulseAll(Object obj) { if (obj==null) { throw new ArgumentNullException("obj"); } ObjPulseAll(obj); } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ExceptionUtil.cs
- SqlUserDefinedAggregateAttribute.cs
- SmiTypedGetterSetter.cs
- ConfigViewGenerator.cs
- BaseCollection.cs
- Nodes.cs
- UnsafeNativeMethods.cs
- ParserExtension.cs
- Bold.cs
- WebPartConnectVerb.cs
- SubMenuStyleCollection.cs
- NamespaceInfo.cs
- AssociationSetEnd.cs
- TextAnchor.cs
- NextPreviousPagerField.cs
- HMACMD5.cs
- SpellCheck.cs
- InfoCardCryptoHelper.cs
- CustomDictionarySources.cs
- StdRegProviderWrapper.cs
- TraceContextEventArgs.cs
- SignedXml.cs
- ToolStripPanelRenderEventArgs.cs
- CalendarDateRangeChangingEventArgs.cs
- SapiGrammar.cs
- ExpressionCopier.cs
- SizeLimitedCache.cs
- OutputCacheProfile.cs
- CodeRegionDirective.cs
- XMLDiffLoader.cs
- TransactionManager.cs
- OracleInternalConnection.cs
- DecimalAnimationUsingKeyFrames.cs
- RawStylusInput.cs
- XmlSchemaCompilationSettings.cs
- HandoffBehavior.cs
- UriWriter.cs
- CodeCompileUnit.cs
- WebPartDeleteVerb.cs
- StrongNameMembershipCondition.cs
- TemplateXamlTreeBuilder.cs
- EqualityComparer.cs
- OdbcEnvironment.cs
- ToolStripSettings.cs
- SoapReflector.cs
- Helpers.cs
- EntityTemplateFactory.cs
- BindingMemberInfo.cs
- ButtonField.cs
- HttpServerVarsCollection.cs
- UIElementParaClient.cs
- RunClient.cs
- ListViewItem.cs
- DataGridViewComboBoxColumn.cs
- TreeViewEvent.cs
- ResourceSetExpression.cs
- TextRunProperties.cs
- PerfCounterSection.cs
- EncryptedPackage.cs
- AlphabeticalEnumConverter.cs
- _ConnectionGroup.cs
- EntityDescriptor.cs
- DecoderReplacementFallback.cs
- ListViewItem.cs
- TableLayout.cs
- Debug.cs
- NonSerializedAttribute.cs
- XmlTextReaderImplHelpers.cs
- SortQuery.cs
- StrongNameUtility.cs
- ConnectionPoolManager.cs
- SHA1CryptoServiceProvider.cs
- FieldToken.cs
- WebServiceParameterData.cs
- ValidationResult.cs
- ReadOnlyDictionary.cs
- WebRequestModuleElement.cs
- MainMenu.cs
- ToolboxComponentsCreatingEventArgs.cs
- SiteMapNodeItem.cs
- ProfessionalColors.cs
- WebPartZoneAutoFormat.cs
- CompareValidator.cs
- XmlSchemaChoice.cs
- Array.cs
- Binding.cs
- DbDataAdapter.cs
- NamespaceExpr.cs
- AssemblyUtil.cs
- _LazyAsyncResult.cs
- AnnotationResource.cs
- BaseCodePageEncoding.cs
- HttpListenerResponse.cs
- Section.cs
- XmlMembersMapping.cs
- RegexBoyerMoore.cs
- LifetimeServices.cs
- SessionPageStateSection.cs
- ServicePoint.cs
- BamlLocalizationDictionary.cs