InterlockedCF 1.0, ECMA 1.0

System.Threading (mscorlib.dll)sealed class

The static members of this class provide thread safety for common built-in arithmetic operations, such as increasing and decreasing a variable by one, and exchanging variables.

If two threads increment the same variable, one thread could be interrupted after both have retrieved the initial value of the variable. If this happens, then both operations store the same value, meaning that the variable has been incremented once instead of twice. The Interlocked methods protect against this kind of error. Increment( ) and Decrement( ) increase and decrease a variable by one, respectively, and Exchange( ) switches two variables. CompareExchange( ) compares the first two variables and, if true, assigns the third value to the first variable.

public sealed class Interlocked {
// Public Static Methods
   public static int CompareExchange(ref int location1, int value, int comparand);
   public static object CompareExchange(ref object location1, object value, object comparand);
   public static float CompareExchange(ref float location1, float value, float comparand);
   public static int Decrement(ref int location);
   public static long Decrement(ref long location);
   public static int Exchange(ref int location1, int value);
   public static object Exchange(ref object location1, object value);
   public static float Exchange(ref float location1, float value);
   public static int Increment(ref int location);
   public static long Increment(ref long location);

    Part II: Programming with the .NET Framework
    Part IV: API Quick Reference
    Chapter 26. System

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