LockCookie.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Threading / LockCookie.cs / 1 / LockCookie.cs
                        

                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class:    LockCookie 
**
** 
** Purpose: Defines the lock that implements
**          single-writer/multiple-reader semantics
**
** 
===========================================================*/
 
namespace System.Threading { 

    using System; 
    [System.Runtime.InteropServices.ComVisible(true)]
    public struct LockCookie
    {
        private int _dwFlags; 
        private int _dwWriterSeqNum;
        private int _wReaderAndWriterLevel; 
        private int _dwThreadID; 

        public override int GetHashCode() 
        {
            // review - [....]!
            return _dwFlags + _dwWriterSeqNum + _wReaderAndWriterLevel + _dwThreadID;
        } 

        public override bool Equals(Object obj) 
        { 
            if (obj is LockCookie)
                return Equals((LockCookie)obj); 
            else
                return false;
        }
 
        public bool Equals(LockCookie obj)
        { 
            return obj._dwFlags == _dwFlags && obj._dwWriterSeqNum == _dwWriterSeqNum && 
                obj._wReaderAndWriterLevel == _wReaderAndWriterLevel && obj._dwThreadID == _dwThreadID;
        } 

        public static bool operator ==(LockCookie a, LockCookie b)
        {
            return a.Equals(b); 
        }
 
        public static bool operator !=(LockCookie a, LockCookie b) 
        {
            return !(a == b); 
        }
    }
}

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