OpCodes.Volatile Field
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Specifies that an address currently atop the evaluation stack might be volatile, and the results of reading that location cannot be cached or that multiple stores to that location cannot be suppressed.
Namespace: System.Reflection.Emit
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Shared ReadOnly Volatile As OpCode
public static readonly OpCode Volatile
Remarks
The following table lists the instruction's hexadecimal and Microsoft intermediate language (MSIL) assembly format, along with a brief reference summary:
Format |
Assembly Format |
Description |
|---|---|---|
FE 13 |
volatile. |
Indicates that the subsequent pointer reference is volatile. |
The stack transitional behavior, in sequential order, is:
- An address is pushed onto the stack.
volatile. specifies that the address is a volatile address (that is, it can be referenced externally to the current thread of execution) and the results of reading that location cannot be cached or that multiple stores to that location cannot be suppressed. Marking an access as volatile affects only that single access; other accesses to the same location must be marked separately. Access to volatile locations need not be performed atomically.
The Unaligned and volatile prefixes can be combined in either order. They must immediately precede a ldind, stind, ldfld, stfld, ldobj, stobj, initblk, or cpblk instruction. Only the volatile prefix is allowed for the Ldsfld and Stsfld instructions.
The following Emit method overload can use the volatile opcode:
- ILGenerator.Emit(OpCode)
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.