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Thread.VolatileWrite Method (Single, Single)

Writes a value to a field immediately, so that the value is visible to all processors in the computer.

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

public static void VolatileWrite(
	ref float address,
	float value
)

Parameters

address
Type: System.Single

The field to which the value is to be written.

value
Type: System.Single

The value to be written.

VolatileRead and VolatileWrite are for special cases of synchronization. Under normal circumstances, the C# lock statement, the Visual Basic SyncLock statement, and the Monitor class provide easier alternatives.

On a multiprocessor system, VolatileWrite ensures that a value written to a memory location is immediately visible to all processors. This might require flushing processor caches.

Even on a uniprocessor system, VolatileRead and VolatileWrite ensure that a value is read or written to memory, and not cached (for example, in a processor register). Thus, you can use them to synchronize access to a field that can be updated by another thread, or by hardware.

Calling this method affects only a single memory access. To provide effective synchronization for a field, all access to the field must use VolatileRead or VolatileWrite.

NoteNote

In C#, using the volatile modifier on a field guarantees that all access to that field uses VolatileRead or VolatileWrite.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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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