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Update string marshallers to V2 shape#71849

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jkotas merged 8 commits intodotnet:mainfrom
AaronRobinsonMSFT:update_strings
Jul 10, 2022
Merged

Update string marshallers to V2 shape#71849
jkotas merged 8 commits intodotnet:mainfrom
AaronRobinsonMSFT:update_strings

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@AaronRobinsonMSFT AaronRobinsonMSFT commented Jul 8, 2022 •
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This updates the marshallers and the built-in system and NativeAOT's use of them.

/cc @elinor-fung @jkoritzinsky @jkotas

Generated code examples

UTF-16

[System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Interop.LibraryImportGenerator", "42.42.42.42")]
[System.Runtime.CompilerServices.SkipLocalsInitAttribute]
public static partial string Strings(string a1, in string a2, ref string a3, out string a4)
{
    System.Runtime.CompilerServices.Unsafe.SkipInit(out a4);
    ushort* __a2_native = default;
    ushort* __a3_native = default;
    ushort* __a4_native = default;
    string __retVal;
    ushort* __retVal_native = default;
    try
    {
        // Marshal - Convert managed data to native data.
        __a2_native = global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.ConvertToUnmanaged(a2);
        __a3_native = global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.ConvertToUnmanaged(a3);
        // Pin - Pin data in preparation for calling the P/Invoke.
        fixed (void* __a1_native = &global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.GetPinnableReference(a1))
        {
            __retVal_native = __PInvoke((ushort*)__a1_native, &__a2_native, &__a3_native, &__a4_native);
        }

        // Unmarshal - Convert native data to managed data.
        __retVal = global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.ConvertToManaged(__retVal_native);
        a4 = global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.ConvertToManaged(__a4_native);
        a3 = global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.ConvertToManaged(__a3_native);
    }
    finally
    {
        // Cleanup - Perform required cleanup.
        global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.Free(__retVal_native);
        global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.Free(__a2_native);
        global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.Free(__a3_native);
        global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.Free(__a4_native);
    }

    return __retVal;
    // Local P/Invoke
    [System.Runtime.InteropServices.DllImportAttribute("Microsoft.Interop.Tests.NativeExportsNE", EntryPoint = "Strings", ExactSpelling = true)]
    static extern unsafe ushort* __PInvoke(ushort* a1, ushort** a2, ushort** a3, ushort** a4);
}

UTF-8

[System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Interop.LibraryImportGenerator", "42.42.42.42")]
[System.Runtime.CompilerServices.SkipLocalsInitAttribute]
public static partial string Strings(string a1, in string a2, ref string a3, out string a4)
{
    System.Runtime.CompilerServices.Unsafe.SkipInit(out a4);
    byte* __a1_native = default;
    byte* __a2_native = default;
    byte* __a3_native = default;
    byte* __a4_native = default;
    string __retVal;
    byte* __retVal_native = default;
    // Setup - Perform required setup.
    global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn __a1_native__marshaller = new();
    global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn __a2_native__marshaller = new();
    try
    {
        // Marshal - Convert managed data to native data.
        byte* __a1_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a1_native__marshaller.FromManaged(a1, new System.Span<byte>(__a1_native__stackptr, global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn.BufferSize));
        byte* __a2_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a2_native__marshaller.FromManaged(a2, new System.Span<byte>(__a2_native__stackptr, global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn.BufferSize));
        __a3_native = global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ConvertToUnmanaged(a3);
        {
            // PinnedMarshal - Convert managed data to native data that requires the managed data to be pinned.
            __a1_native = __a1_native__marshaller.ToUnmanaged();
            __a2_native = __a2_native__marshaller.ToUnmanaged();
            __retVal_native = __PInvoke(__a1_native, &__a2_native, &__a3_native, &__a4_native);
        }

        // Unmarshal - Convert native data to managed data.
        __retVal = global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ConvertToManaged(__retVal_native);
        a4 = global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ConvertToManaged(__a4_native);
        a3 = global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ConvertToManaged(__a3_native);
    }
    finally
    {
        // Cleanup - Perform required cleanup.
        global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.Free(__retVal_native);
        __a1_native__marshaller.Free();
        __a2_native__marshaller.Free();
        global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.Free(__a3_native);
        global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.Free(__a4_native);
    }

    return __retVal;
    // Local P/Invoke
    [System.Runtime.InteropServices.DllImportAttribute("Microsoft.Interop.Tests.NativeExportsNE", EntryPoint = "Strings", ExactSpelling = true)]
    static extern unsafe byte* __PInvoke(byte* a1, byte** a2, byte** a3, byte** a4);
}

ANSI

[System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Interop.LibraryImportGenerator", "42.42.42.42")]
[System.Runtime.CompilerServices.SkipLocalsInitAttribute]
public static partial string Strings(string a1, in string a2, ref string a3, out string a4)
{
    System.Runtime.CompilerServices.Unsafe.SkipInit(out a4);
    byte* __a1_native = default;
    byte* __a2_native = default;
    byte* __a3_native = default;
    byte* __a4_native = default;
    string __retVal;
    byte* __retVal_native = default;
    // Setup - Perform required setup.
    global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn __a1_native__marshaller = new();
    global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn __a2_native__marshaller = new();
    try
    {
        // Marshal - Convert managed data to native data.
        byte* __a1_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a1_native__marshaller.FromManaged(a1, new System.Span<byte>(__a1_native__stackptr, global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn.BufferSize));
        byte* __a2_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a2_native__marshaller.FromManaged(a2, new System.Span<byte>(__a2_native__stackptr, global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn.BufferSize));
        __a3_native = global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ConvertToUnmanaged(a3);
        {
            // PinnedMarshal - Convert managed data to native data that requires the managed data to be pinned.
            __a1_native = __a1_native__marshaller.ToUnmanaged();
            __a2_native = __a2_native__marshaller.ToUnmanaged();
            __retVal_native = __PInvoke(__a1_native, &__a2_native, &__a3_native, &__a4_native);
        }

        // Unmarshal - Convert native data to managed data.
        __retVal = global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ConvertToManaged(__retVal_native);
        a4 = global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ConvertToManaged(__a4_native);
        a3 = global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ConvertToManaged(__a3_native);
    }
    finally
    {
        // Cleanup - Perform required cleanup.
        global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.Free(__retVal_native);
        __a1_native__marshaller.Free();
        __a2_native__marshaller.Free();
        global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.Free(__a3_native);
        global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.Free(__a4_native);
    }

    return __retVal;
    // Local P/Invoke
    [System.Runtime.InteropServices.DllImportAttribute("Microsoft.Interop.Tests.NativeExportsNE", EntryPoint = "Strings", ExactSpelling = true)]
    static extern unsafe byte* __PInvoke(byte* a1, byte** a2, byte** a3, byte** a4);
}

BSTR

[System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Interop.LibraryImportGenerator", "42.42.42.42")]
[System.Runtime.CompilerServices.SkipLocalsInitAttribute]
public static partial string Strings(string a1, in string a2, ref string a3, out string a4)
{
    System.Runtime.CompilerServices.Unsafe.SkipInit(out a4);
    ushort* __a1_native = default;
    ushort* __a2_native = default;
    ushort* __a3_native = default;
    ushort* __a4_native = default;
    string __retVal;
    ushort* __retVal_native = default;
    // Setup - Perform required setup.
    global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.ManagedToUnmanagedIn __a1_native__marshaller = new();
    global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.ManagedToUnmanagedIn __a2_native__marshaller = new();
    try
    {
        // Marshal - Convert managed data to native data.
        byte* __a1_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a1_native__marshaller.FromManaged(a1, new System.Span<byte>(__a1_native__stackptr, global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.ManagedToUnmanagedIn.BufferSize));
        byte* __a2_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a2_native__marshaller.FromManaged(a2, new System.Span<byte>(__a2_native__stackptr, global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.ManagedToUnmanagedIn.BufferSize));
        __a3_native = global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.ConvertToUnmanaged(a3);
        {
            // PinnedMarshal - Convert managed data to native data that requires the managed data to be pinned.
            __a1_native = __a1_native__marshaller.ToUnmanaged();
            __a2_native = __a2_native__marshaller.ToUnmanaged();
            __retVal_native = __PInvoke(__a1_native, &__a2_native, &__a3_native, &__a4_native);
        }

        // Unmarshal - Convert native data to managed data.
        __retVal = global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.ConvertToManaged(__retVal_native);
        a4 = global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.ConvertToManaged(__a4_native);
        a3 = global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.ConvertToManaged(__a3_native);
    }
    finally
    {
        // Cleanup - Perform required cleanup.
        global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.Free(__retVal_native);
        __a1_native__marshaller.Free();
        __a2_native__marshaller.Free();
        global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.Free(__a3_native);
        global::System.Runtime.InteropServices.Marshalling.BStrStringMarshaller.Free(__a4_native);
    }

    return __retVal;
    // Local P/Invoke
    [System.Runtime.InteropServices.DllImportAttribute("Microsoft.Interop.Tests.NativeExportsNE", EntryPoint = "Strings", ExactSpelling = true)]
    static extern unsafe ushort* __PInvoke(ushort* a1, ushort** a2, ushort** a3, ushort** a4);
}

@AaronRobinsonMSFT AaronRobinsonMSFT added this to the 7.0.0 milestone Jul 8, 2022
@ghost
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ghost commented Jul 8, 2022

Note regarding the new-api-needs-documentation label:

This serves as a reminder for when your PR is modifying a ref *.cs file and adding/modifying public APIs, to please make sure the API implementation in the src *.cs file is documented with triple slash comments, so the PR reviewers can sign off that change.

@ghost
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ghost commented Jul 8, 2022

Tagging subscribers to this area: @dotnet/interop-contrib
See info in area-owners.md if you want to be subscribed.

Issue Details

This updates the marshallers and the built-in system and NativeAOT's use of them.

Generated code examples

UTF-16

[System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Interop.LibraryImportGenerator", "42.42.42.42")]
[System.Runtime.CompilerServices.SkipLocalsInitAttribute]
public static partial string Strings(string a1, in string a2, ref string a3, out string a4)
{
    System.Runtime.CompilerServices.Unsafe.SkipInit(out a4);
    ushort* __a2_native = default;
    ushort* __a3_native = default;
    ushort* __a4_native = default;
    string __retVal;
    ushort* __retVal_native = default;
    try
    {
        // Marshal - Convert managed data to native data.
        __a2_native = global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.ConvertToUnmanaged(a2);
        __a3_native = global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.ConvertToUnmanaged(a3);
        // Pin - Pin data in preparation for calling the P/Invoke.
        fixed (void* __a1_native = &global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.GetPinnableReference(a1))
        {
            __retVal_native = __PInvoke((ushort*)__a1_native, &__a2_native, &__a3_native, &__a4_native);
        }

        // Unmarshal - Convert native data to managed data.
        __retVal = global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.ConvertToManaged(__retVal_native);
        a4 = global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.ConvertToManaged(__a4_native);
        a3 = global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.ConvertToManaged(__a3_native);
    }
    finally
    {
        // Cleanup - Perform required cleanup.
        global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.Free(__retVal_native);
        global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.Free(__a2_native);
        global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.Free(__a3_native);
        global::System.Runtime.InteropServices.Marshalling.Utf16StringMarshaller.Free(__a4_native);
    }

    return __retVal;
    // Local P/Invoke
    [System.Runtime.InteropServices.DllImportAttribute("Microsoft.Interop.Tests.NativeExportsNE", EntryPoint = "Strings", ExactSpelling = true)]
    static extern unsafe ushort* __PInvoke(ushort* a1, ushort** a2, ushort** a3, ushort** a4);
}

UTF-8

[System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Interop.LibraryImportGenerator", "42.42.42.42")]
[System.Runtime.CompilerServices.SkipLocalsInitAttribute]
public static partial string Strings(string a1, in string a2, ref string a3, out string a4)
{
    System.Runtime.CompilerServices.Unsafe.SkipInit(out a4);
    byte* __a1_native = default;
    byte* __a2_native = default;
    byte* __a3_native = default;
    byte* __a4_native = default;
    string __retVal;
    byte* __retVal_native = default;
    // Setup - Perform required setup.
    global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn __a1_native__marshaller = new();
    global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn __a2_native__marshaller = new();
    try
    {
        // Marshal - Convert managed data to native data.
        byte* __a1_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a1_native__marshaller.FromManaged(a1, new System.Span<byte>(__a1_native__stackptr, global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn.BufferSize));
        byte* __a2_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a2_native__marshaller.FromManaged(a2, new System.Span<byte>(__a2_native__stackptr, global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ManagedToUnmanagedIn.BufferSize));
        __a3_native = global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ConvertToUnmanaged(a3);
        {
            // PinnedMarshal - Convert managed data to native data that requires the managed data to be pinned.
            __a1_native = __a1_native__marshaller.ToUnmanaged();
            __a2_native = __a2_native__marshaller.ToUnmanaged();
            __retVal_native = __PInvoke(__a1_native, &__a2_native, &__a3_native, &__a4_native);
        }

        // Unmarshal - Convert native data to managed data.
        __retVal = global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ConvertToManaged(__retVal_native);
        a4 = global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ConvertToManaged(__a4_native);
        a3 = global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.ConvertToManaged(__a3_native);
    }
    finally
    {
        // Cleanup - Perform required cleanup.
        global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.Free(__retVal_native);
        __a1_native__marshaller.Free();
        __a2_native__marshaller.Free();
        global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.Free(__a3_native);
        global::System.Runtime.InteropServices.Marshalling.Utf8StringMarshaller.Free(__a4_native);
    }

    return __retVal;
    // Local P/Invoke
    [System.Runtime.InteropServices.DllImportAttribute("Microsoft.Interop.Tests.NativeExportsNE", EntryPoint = "Strings", ExactSpelling = true)]
    static extern unsafe byte* __PInvoke(byte* a1, byte** a2, byte** a3, byte** a4);
}

ANSI

[System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Interop.LibraryImportGenerator", "42.42.42.42")]
[System.Runtime.CompilerServices.SkipLocalsInitAttribute]
public static partial string Strings(string a1, in string a2, ref string a3, out string a4)
{
    System.Runtime.CompilerServices.Unsafe.SkipInit(out a4);
    byte* __a1_native = default;
    byte* __a2_native = default;
    byte* __a3_native = default;
    byte* __a4_native = default;
    string __retVal;
    byte* __retVal_native = default;
    // Setup - Perform required setup.
    global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn __a1_native__marshaller = new();
    global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn __a2_native__marshaller = new();
    try
    {
        // Marshal - Convert managed data to native data.
        byte* __a1_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a1_native__marshaller.FromManaged(a1, new System.Span<byte>(__a1_native__stackptr, global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn.BufferSize));
        byte* __a2_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a2_native__marshaller.FromManaged(a2, new System.Span<byte>(__a2_native__stackptr, global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ManagedToUnmanagedIn.BufferSize));
        __a3_native = global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ConvertToUnmanaged(a3);
        {
            // PinnedMarshal - Convert managed data to native data that requires the managed data to be pinned.
            __a1_native = __a1_native__marshaller.ToUnmanaged();
            __a2_native = __a2_native__marshaller.ToUnmanaged();
            __retVal_native = __PInvoke(__a1_native, &__a2_native, &__a3_native, &__a4_native);
        }

        // Unmarshal - Convert native data to managed data.
        __retVal = global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ConvertToManaged(__retVal_native);
        a4 = global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ConvertToManaged(__a4_native);
        a3 = global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.ConvertToManaged(__a3_native);
    }
    finally
    {
        // Cleanup - Perform required cleanup.
        global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.Free(__retVal_native);
        __a1_native__marshaller.Free();
        __a2_native__marshaller.Free();
        global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.Free(__a3_native);
        global::System.Runtime.InteropServices.Marshalling.AnsiStringMarshaller.Free(__a4_native);
    }

    return __retVal;
    // Local P/Invoke
    [System.Runtime.InteropServices.DllImportAttribute("Microsoft.Interop.Tests.NativeExportsNE", EntryPoint = "Strings", ExactSpelling = true)]
    static extern unsafe byte* __PInvoke(byte* a1, byte** a2, byte** a3, byte** a4);
}

BSTR

[System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.Interop.LibraryImportGenerator", "42.42.42.42")]
[System.Runtime.CompilerServices.SkipLocalsInitAttribute]
public static partial string Strings(string a1, in string a2, ref string a3, out string a4)
{
    System.Runtime.CompilerServices.Unsafe.SkipInit(out a4);
    ushort* __a1_native = default;
    ushort* __a2_native = default;
    ushort* __a3_native = default;
    ushort* __a4_native = default;
    string __retVal;
    ushort* __retVal_native = default;
    // Setup - Perform required setup.
    global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.ManagedToUnmanagedIn __a1_native__marshaller = new();
    global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.ManagedToUnmanagedIn __a2_native__marshaller = new();
    try
    {
        // Marshal - Convert managed data to native data.
        byte* __a1_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a1_native__marshaller.FromManaged(a1, new System.Span<byte>(__a1_native__stackptr, global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.ManagedToUnmanagedIn.BufferSize));
        byte* __a2_native__stackptr = stackalloc byte[global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.ManagedToUnmanagedIn.BufferSize];
        __a2_native__marshaller.FromManaged(a2, new System.Span<byte>(__a2_native__stackptr, global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.ManagedToUnmanagedIn.BufferSize));
        __a3_native = global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.ConvertToUnmanaged(a3);
        {
            // PinnedMarshal - Convert managed data to native data that requires the managed data to be pinned.
            __a1_native = __a1_native__marshaller.ToUnmanaged();
            __a2_native = __a2_native__marshaller.ToUnmanaged();
            __retVal_native = __PInvoke(__a1_native, &__a2_native, &__a3_native, &__a4_native);
        }

        // Unmarshal - Convert native data to managed data.
        __retVal = global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.ConvertToManaged(__retVal_native);
        a4 = global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.ConvertToManaged(__a4_native);
        a3 = global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.ConvertToManaged(__a3_native);
    }
    finally
    {
        // Cleanup - Perform required cleanup.
        global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.Free(__retVal_native);
        __a1_native__marshaller.Free();
        __a2_native__marshaller.Free();
        global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.Free(__a3_native);
        global::System.Runtime.InteropServices.Marshalling.BstrStringMarshaller.Free(__a4_native);
    }

    return __retVal;
    // Local P/Invoke
    [System.Runtime.InteropServices.DllImportAttribute("Microsoft.Interop.Tests.NativeExportsNE", EntryPoint = "Strings", ExactSpelling = true)]
    static extern unsafe ushort* __PInvoke(ushort* a1, ushort** a2, ushort** a3, ushort** a4);
}
Author: AaronRobinsonMSFT
Assignees: -
Labels:

area-System.Runtime.InteropServices
Milestone: 7.0.0

jkotas
jkotas reviewed Jul 8, 2022
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jkotas
jkotas reviewed Jul 8, 2022
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jkotas
jkotas reviewed Jul 8, 2022
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@AaronRobinsonMSFT
Use NativeMemory.Alloc/Free where possible.
3b560fb 
Avoid initialization of marshaller when not used.
Remove unneccessary unmanaged->managed APIs for In marshallers.
@AaronRobinsonMSFT
Add a ClassLoader::LoadTypeByNameThrowing overload
3d73a44 
  that can be used to load nested classes.
jkotas
jkotas approved these changes Jul 9, 2022
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LGTM. Thank you!

@jkotas jkotas merged commit 1af8727 into dotnet:main Jul 10, 2022
@AaronRobinsonMSFT AaronRobinsonMSFT deleted the update_strings branch July 10, 2022 02:28
@karelz karelz mentioned this pull request Jul 21, 2022
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@jkotas jkotas jkotas approved these changes

@elinor-fung elinor-fung elinor-fung approved these changes

@MichalStrehovsky MichalStrehovsky Awaiting requested review from MichalStrehovsky MichalStrehovsky is a code owner

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area-System.Runtime.InteropServices new-api-needs-documentation

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