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Interlocked::Read Method

Returns a 64-bit value, loaded as an atomic operation.

Namespace:  System.Threading
Assembly:  mscorlib (in mscorlib.dll)

public:
static long long Read(
	long long% location
)

Parameters

location
Type: System::Int64%

The 64-bit value to be loaded.

Return Value

Type: System::Int64
The loaded value.

The Read method is unnecessary on 64-bit systems, because 64-bit read operations are already atomic. On 32-bit systems, 64-bit read operations are not atomic unless performed using Read.

The Read method and 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.

NoteNote

IntPtr is a platform-specific type.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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