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CallConvFastcall Class

This calling convention is not supported in this version of the .NET Framework.

Namespace: System.Runtime.CompilerServices
Assembly: mscorlib (in mscorlib.dll)

[ComVisibleAttribute(true)] 
public class CallConvFastcall
/** @attribute ComVisibleAttribute(true) */ 
public class CallConvFastcall
ComVisibleAttribute(true) 
public class CallConvFastcall
Not applicable.

The __fastcall calling convention specifies that arguments to functions be passed in registers, when possible.

The classes in System.Runtime.CompilerServices are for compiler writers' use only.

Compilers emit custom modifiers within metadata to change the way that the just-in-time (JIT) compiler handles values when the default behavior is not appropriate. When the JIT compiler encounters a custom modifier, it handles the value in the way that the modifier specifies. Compilers can apply custom modifiers to methods, parameters, and return values. The JIT compiler must respond to required modifiers but can ignore optional modifiers. A C++ compiler could emit a custom modifier to describe how a byte should be treated in cases where the JIT compiler treats bytes in manner that is not compatible with C++ by default.

You can emit custom modifiers into metadata using one of the following techniques:

System.Object
  System.Runtime.CompilerServices.CallConvFastcall

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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