Compares two 64-bit signed integers for equality and, if they are equal, replaces one of the values.
Namespace:
System.Threading
Assembly:
mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
Public Shared Function CompareExchange ( _
ByRef location1 As Long, _
value As Long, _
comparand As Long _
) As Long
Dim location1 As Long
Dim value As Long
Dim comparand As Long
Dim returnValue As Long
returnValue = Interlocked.CompareExchange(location1, _
value, comparand)
public static long CompareExchange(
ref long location1,
long value,
long comparand
)
public:
static long long CompareExchange(
long long% location1,
long long value,
long long comparand
)
public static function CompareExchange(
location1 : long,
value : long,
comparand : long
) : long
Parameters
- location1
- Type: System..::.Int64%
The destination, whose value is compared with comparand and possibly replaced.
- value
- Type: System..::.Int64
The value that replaces the destination value if the comparison results in equality.
- comparand
- Type: System..::.Int64
The value that is compared to the value at location1.
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 CompareExchange is the original value in location1, whether or not the exchange takes place.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0
Reference
Other Resources