GetDllImportCustomAttribute()

static DllImportAttribute System.Reflection.PseudoCustomAttribute.GetDllImportCustomAttribute ( RuntimeMethodInfo method )

inlinestaticprivate

Definition at line 216 of file PseudoCustomAttribute.cs.

    {
        if ((method.Attributes & MethodAttributes.PinvokeImpl) == 0)
        {
            return null;
        }
        MetadataImport metadataImport = ModuleHandle.GetMetadataImport(method.Module.ModuleHandle.GetRuntimeModule());
        int metadataToken = method.MetadataToken;
        metadataImport.GetPInvokeMap(metadataToken, out var attributes, out var importName, out var importDll);
        CharSet charSet = CharSet.None;
        switch (attributes & PInvokeAttributes.CharSetMask)
        {
        case PInvokeAttributes.CharSetNotSpec:
            charSet = CharSet.None;
            break;
        case PInvokeAttributes.CharSetAnsi:
            charSet = CharSet.Ansi;
            break;
        case PInvokeAttributes.CharSetUnicode:
            charSet = CharSet.Unicode;
            break;
        case PInvokeAttributes.CharSetMask:
            charSet = CharSet.Auto;
            break;
        }
        CallingConvention callingConvention = CallingConvention.Cdecl;
        switch (attributes & PInvokeAttributes.CallConvMask)
        {
        case PInvokeAttributes.CallConvWinapi:
            callingConvention = CallingConvention.Winapi;
            break;
        case PInvokeAttributes.CallConvCdecl:
            callingConvention = CallingConvention.Cdecl;
            break;
        case PInvokeAttributes.CallConvStdcall:
            callingConvention = CallingConvention.StdCall;
            break;
        case PInvokeAttributes.CallConvThiscall:
            callingConvention = CallingConvention.ThisCall;
            break;
        case PInvokeAttributes.CallConvFastcall:
            callingConvention = CallingConvention.FastCall;
            break;
        }
        DllImportAttribute dllImportAttribute = new DllImportAttribute(importDll);
        dllImportAttribute.EntryPoint = importName;
        dllImportAttribute.CharSet = charSet;
        dllImportAttribute.SetLastError = (attributes & PInvokeAttributes.SupportsLastError) != 0;
        dllImportAttribute.ExactSpelling = (attributes & PInvokeAttributes.NoMangle) != 0;
        dllImportAttribute.PreserveSig = (method.GetMethodImplementationFlags() & MethodImplAttributes.PreserveSig) != 0;
        dllImportAttribute.CallingConvention = callingConvention;
        dllImportAttribute.BestFitMapping = (attributes & PInvokeAttributes.BestFitMask) == PInvokeAttributes.BestFitEnabled;
        dllImportAttribute.ThrowOnUnmappableChar = (attributes & PInvokeAttributes.ThrowOnUnmappableCharMask) == PInvokeAttributes.ThrowOnUnmappableCharEnabled;
        return dllImportAttribute;
    }

References System.ModuleHandle.GetMetadataImport().

Referenced by System.Reflection.PseudoCustomAttribute.GetCustomAttributes().