Interlocked.CompareExchange Method (IntPtr%, IntPtr, IntPtr)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Compares two platform-specific handles or pointers for equality and, if they are equal, replaces one of them.
Assembly: mscorlib (in mscorlib.dll)
'Declaration Public Shared Function CompareExchange ( _ ByRef location1 As IntPtr, _ value As IntPtr, _ comparand As IntPtr _ ) As IntPtr
Parameters
- location1
- Type:
System.IntPtr
%
The destination IntPtr, whose value is compared with the value of comparand and possibly replaced by value.
- value
- Type: System.IntPtr
The IntPtr that replaces the destination value if the comparison results in equality.
- comparand
- Type: System.IntPtr
The IntPtr that is compared to the value at location1.
| Exception | Condition |
|---|---|
| NullReferenceException | The address of location1 is a null pointer. |
If comparand and the value in location1 are equal, then value is stored in location1. Otherwise, no operation is performed. The compare and exchange operations are performed as an atomic operation. The return value of this method is the original value in location1, whether or not the exchange takes place.
Note: |
|---|
IntPtr is a platform-specific type. |
Note: