Interlocked.cs source code in C# .NET

                        
Code:
                         / Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / clr / src / BCL / System / Threading / Interlocked.cs / 1 / Interlocked.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
namespace System.Threading {
    using System; 
    using System.Security.Permissions; 
    using System.Runtime.CompilerServices;
    using System.Runtime.ConstrainedExecution; 

    // After much discussion, we decided the Interlocked class doesn't need
    // any HPA's for synchronization or external threading.  They hurt C#'s
    // codegen for the yield keyword, and arguably they didn't protect much. 
    // Instead, they penalized people (and compilers) for writing threadsafe
    // code. 
    public static class Interlocked 
    {
        /****************************** 
         * Increment
         *   Implemented: int
         *                        long
         *****************************/ 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        public static extern int Increment(ref int location);
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        public static extern long Increment(ref long location);

        /****************************** 
         * Decrement
         *   Implemented: int 
         *                        long 
         *****************************/
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public static extern int Decrement(ref int location);
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        public static extern long Decrement(ref long location); 
 
        /******************************
         * Exchange 
         *   Implemented: int
         *                        long
         *                        float
         *                        double 
         *                        Object
         *                        IntPtr 
         *****************************/ 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public static extern int Exchange(ref int location1, int value);

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        public static extern long Exchange(ref long location1, long value);
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        public static extern float Exchange(ref float location1, float value);
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        public static extern double Exchange(ref double location1, double value);

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public static extern Object Exchange(ref Object location1, Object value); 
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        public static extern IntPtr Exchange(ref IntPtr location1, IntPtr value);

        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        [System.Runtime.InteropServices.ComVisible(false)] 
        public static T Exchange(ref T location1, T value) where T : class
        { 
            _Exchange(__makeref(location1), __makeref(value)); 
            //Since value is a local we use trash its data on return
            //  The Exchange replaces the data with new data 
            //  so after the return "value" contains the original location1
            //See ExchangeGeneric for more details
            return value;
        } 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        private static extern void _Exchange(TypedReference location1, TypedReference value);
 
        /******************************
         * CompareExchange
         *    Implemented: int
         *                         long 
         *                         float
         *                         double 
         *                         Object 
         *                         IntPtr
         *****************************/ 

        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public static extern int CompareExchange(ref int location1, int value, int comparand); 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        public static extern long CompareExchange(ref long location1, long value, long comparand); 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        public static extern float CompareExchange(ref float location1, float value, float comparand);

        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        public static extern double CompareExchange(ref double location1, double value, double comparand); 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        public static extern Object CompareExchange(ref Object location1, Object value, Object comparand);
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public static extern IntPtr CompareExchange(ref IntPtr location1, IntPtr value, IntPtr comparand);
 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        [System.Runtime.InteropServices.ComVisible(false)] 
        public static T CompareExchange(ref T location1, T value, T comparand) where T : class 
        {
            _CompareExchange(__makeref(location1), __makeref(value), comparand); 
            //Since value is a local we use trash its data on return
            //  The Exchange replaces the data with new data
            //  so after the return "value" contains the original location1
            //See CompareExchangeGeneric for more details 
            return value;
        } 
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        private static extern void _CompareExchange(TypedReference location1, TypedReference value, Object comparand);

        /******************************
         * Add 
         *    Implemented: int
         *                         long 
         *****************************/ 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        internal static extern int ExchangeAdd(ref int location1, int value);

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        internal static extern long ExchangeAdd(ref long location1, long value);
 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        public static int Add(ref int location1, int value)
        { 
            return ExchangeAdd(ref location1, value) + value;
        }

 	 [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        public static long Add(ref long location1, long value)
        { 
            return ExchangeAdd(ref location1, value) + value; 
        }
	 
        /******************************
         * Read
         *****************************/
 
        public static long Read(ref long location)
        { 
            return Interlocked.CompareExchange(ref location,0,0); 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
namespace System.Threading {
    using System; 
    using System.Security.Permissions; 
    using System.Runtime.CompilerServices;
    using System.Runtime.ConstrainedExecution; 

    // After much discussion, we decided the Interlocked class doesn't need
    // any HPA's for synchronization or external threading.  They hurt C#'s
    // codegen for the yield keyword, and arguably they didn't protect much. 
    // Instead, they penalized people (and compilers) for writing threadsafe
    // code. 
    public static class Interlocked 
    {
        /****************************** 
         * Increment
         *   Implemented: int
         *                        long
         *****************************/ 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        public static extern int Increment(ref int location);
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        public static extern long Increment(ref long location);

        /****************************** 
         * Decrement
         *   Implemented: int 
         *                        long 
         *****************************/
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public static extern int Decrement(ref int location);
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        public static extern long Decrement(ref long location); 
 
        /******************************
         * Exchange 
         *   Implemented: int
         *                        long
         *                        float
         *                        double 
         *                        Object
         *                        IntPtr 
         *****************************/ 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public static extern int Exchange(ref int location1, int value);

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        public static extern long Exchange(ref long location1, long value);
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        public static extern float Exchange(ref float location1, float value);
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        public static extern double Exchange(ref double location1, double value);

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public static extern Object Exchange(ref Object location1, Object value); 
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        public static extern IntPtr Exchange(ref IntPtr location1, IntPtr value);

        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        [System.Runtime.InteropServices.ComVisible(false)] 
        public static T Exchange(ref T location1, T value) where T : class
        { 
            _Exchange(__makeref(location1), __makeref(value)); 
            //Since value is a local we use trash its data on return
            //  The Exchange replaces the data with new data 
            //  so after the return "value" contains the original location1
            //See ExchangeGeneric for more details
            return value;
        } 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        private static extern void _Exchange(TypedReference location1, TypedReference value);
 
        /******************************
         * CompareExchange
         *    Implemented: int
         *                         long 
         *                         float
         *                         double 
         *                         Object 
         *                         IntPtr
         *****************************/ 

        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public static extern int CompareExchange(ref int location1, int value, int comparand); 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        public static extern long CompareExchange(ref long location1, long value, long comparand); 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        public static extern float CompareExchange(ref float location1, float value, float comparand);

        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        public static extern double CompareExchange(ref double location1, double value, double comparand); 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        public static extern Object CompareExchange(ref Object location1, Object value, Object comparand);
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        public static extern IntPtr CompareExchange(ref IntPtr location1, IntPtr value, IntPtr comparand);
 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        [System.Runtime.InteropServices.ComVisible(false)] 
        public static T CompareExchange(ref T location1, T value, T comparand) where T : class 
        {
            _CompareExchange(__makeref(location1), __makeref(value), comparand); 
            //Since value is a local we use trash its data on return
            //  The Exchange replaces the data with new data
            //  so after the return "value" contains the original location1
            //See CompareExchangeGeneric for more details 
            return value;
        } 
 
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        private static extern void _CompareExchange(TypedReference location1, TypedReference value, Object comparand);

        /******************************
         * Add 
         *    Implemented: int
         *                         long 
         *****************************/ 

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)]
        internal static extern int ExchangeAdd(ref int location1, int value);

        [MethodImplAttribute(MethodImplOptions.InternalCall)] 
        internal static extern long ExchangeAdd(ref long location1, long value);
 
        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        public static int Add(ref int location1, int value)
        { 
            return ExchangeAdd(ref location1, value) + value;
        }

 	 [ReliabilityContract(Consistency.WillNotCorruptState, Cer.Success)] 
        public static long Add(ref long location1, long value)
        { 
            return ExchangeAdd(ref location1, value) + value; 
        }
	 
        /******************************
         * Read
         *****************************/
 
        public static long Read(ref long location)
        { 
            return Interlocked.CompareExchange(ref location,0,0); 
        }
    } 
}

// 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

• DefaultTypeArgumentAttribute.cs
• ControlAdapter.cs
• ContractMapping.cs
• HostProtectionException.cs
• ClientOperationFormatterProvider.cs
• UrlParameterWriter.cs
• IndexedEnumerable.cs
• DeflateStreamAsyncResult.cs
• CodeCatchClause.cs
• ScriptResourceInfo.cs
• ScanQueryOperator.cs
• PropertyNames.cs
• TemplateControl.cs
• SupportingTokenSecurityTokenResolver.cs
• LoginCancelEventArgs.cs
• ConfigurationValidatorBase.cs
• ProcessInputEventArgs.cs
• CalendarTable.cs
• IPipelineRuntime.cs
• XamlPoint3DCollectionSerializer.cs
• EntityProviderFactory.cs
• TimeSpanMinutesOrInfiniteConverter.cs
• storepermissionattribute.cs
• TraceContext.cs
• RemoteWebConfigurationHostServer.cs
• EntityContainerEntitySet.cs
• DateTime.cs
• Cursors.cs
• Timeline.cs
• CookieHandler.cs
• TrackingProfileDeserializationException.cs
• ExpressionLexer.cs
• SqlCacheDependencySection.cs
• XmlArrayItemAttribute.cs
• TextEndOfParagraph.cs
• ColorAnimationBase.cs
• RestHandler.cs
• ValidateNames.cs
• SizeIndependentAnimationStorage.cs
• Size3DConverter.cs
• DynamicUpdateCommand.cs
• AttributeProviderAttribute.cs
• NullableDecimalMinMaxAggregationOperator.cs
• TextElementEnumerator.cs
• SQLSingle.cs
• Icon.cs
• DataSourceSelectArguments.cs
• RSAPKCS1KeyExchangeDeformatter.cs
• VectorAnimationBase.cs
• SafeCryptHandles.cs
• OracleColumn.cs
• AdditionalEntityFunctions.cs
• ExpressionBinding.cs
• ToolStripItemImageRenderEventArgs.cs
• MobileUserControlDesigner.cs
• OleDbRowUpdatedEvent.cs
• sqlser.cs
• RecordBuilder.cs
• OdbcException.cs
• TagNameToTypeMapper.cs
• UIElementParagraph.cs
• Header.cs
• _Rfc2616CacheValidators.cs
• XomlDesignerLoader.cs
• SubMenuStyle.cs
• BaseHashHelper.cs
• serverconfig.cs
• ellipse.cs
• SweepDirectionValidation.cs
• Hyperlink.cs
• AliasGenerator.cs
• DragDropHelper.cs
• RichTextBoxAutomationPeer.cs
• DocumentScope.cs
• graph.cs
• DoubleCollection.cs
• RequiredFieldValidator.cs
• LogArchiveSnapshot.cs
• TextElement.cs
• BaseValidatorDesigner.cs
• TextParaLineResult.cs
• DataServiceRequestOfT.cs
• SettingsBindableAttribute.cs
• VisualStyleTypesAndProperties.cs
• GenericTypeParameterBuilder.cs
• OdbcPermission.cs
• LinearGradientBrush.cs
• UnsafeNativeMethods.cs
• BindableTemplateBuilder.cs
• AttributeCollection.cs
• OneOf.cs
• SQLInt16.cs
• RoutedEvent.cs
• StyleCollection.cs
• FormViewInsertEventArgs.cs
• FilterableAttribute.cs
• _Connection.cs
• ReceiveMessageRecord.cs
• OdbcCommand.cs
• DataGridViewCellToolTipTextNeededEventArgs.cs