Interlocked.Increment Method (Int64%)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Increments a specified 64-bit signed integer variable and stores the result, as an atomic operation.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- location
- Type:
System.Int64
%
The variable whose value is to be incremented.
| Exception | Condition |
|---|---|
| NullReferenceException | The address of location is a null pointer. |
This method handles an overflow condition by wrapping: If location = Int64.MaxValue, location + 1 = Int64.MinValue. No exception is thrown.
The 64-bit overloads of the Increment, Decrement, and Add methods are truly atomic only on systems where a System.IntPtr is 64 bits long. On other systems, these methods are atomic with respect to each other, but not with respect to other means of accessing the data. Thus, to be thread safe on 32-bit systems, any access to a 64-bit value must be made through the members of the Interlocked class.