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Shockwaver
Shockwaver

Reputation: 401

VB.NET Using System.Threading.Volatile.Write on Enum var types

I am in need of performing a volatile write on a variable that is an Enum type derived from Byte, but I am stucked.

This is my (example) code:

Public Class MyOwnClass
    Friend Enum MyEnum As Byte
        Val1
        Val2
    End Enum

    Private MyEnumVar As MyEnum = MyEnum.Val1

    Friend Sub SetMyEnumVar(ByVal value As MyEnum)
        System.Threading.Volatile.Write(MyEnumVar, value) 'Error!
    End Sub
End Class

Since Threading.Volatile.Write is not provided with a signature with those arguments I get this error

  Error 1   Overload resolution failed because no accessible Write can be called without a narrowing conversion:

With the list of all the overloads of the method.

CTyping the first argument is not working, because CType returns a casted value of course not with the same reference as MyEnumVar where the method gets the first parameter abviously ByRef instead.

CObject that would return a reference is also not viable because the method also hasn't got the overload for an object type other than Write(Of T)(T, T) where Tmust be a class type.

So how can I accomplish my purpose?

Thanks.

Upvotes: 2

Views: 213

Answers (1)

Bjørn-Roger Kringsjå
Bjørn-Roger Kringsjå

Reputation: 9991

You can use the Write(Of T) overload where T is the type of Enum.

System.Threading.Volatile.Write(Of [Enum])(MyEnumVar, value)

Upvotes: 1

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