82 lines
2.5 KiB
C#
82 lines
2.5 KiB
C#
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using System;
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using System.Runtime.InteropServices;
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namespace PCL.Core.Utils.WinRT;
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public static partial class WinRTInterop
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{
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// roapi.h
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[LibraryImport("combase.dll")]
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private static unsafe partial int RoGetActivationFactory(IntPtr activatableClassId, Guid* iid, IntPtr* factory);
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[LibraryImport("combase.dll")]
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private static unsafe partial int RoActivateInstance(IntPtr activatableClassId, IntPtr* instance);
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public static unsafe IntPtr ActivateInstance(ReadOnlySpan<char> activatableClassId)
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{
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var instance = IntPtr.Zero;
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fixed (char* pName = activatableClassId)
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{
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HStringHeader header;
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IntPtr hstring;
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Marshal.ThrowExceptionForHR(
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WindowsCreateStringReference(
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(ushort*)pName,
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activatableClassId.Length,
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(IntPtr*)&header,
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&hstring));
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Marshal.ThrowExceptionForHR(
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RoActivateInstance(
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hstring,
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&instance));
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}
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return instance;
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}
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public static unsafe IntPtr GetActivationFactory(ReadOnlySpan<char> activatableClassId, Guid iid)
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{
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var factory = IntPtr.Zero;
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fixed (char* pName = activatableClassId)
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{
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HStringHeader header;
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IntPtr hstring;
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Marshal.ThrowExceptionForHR(
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WindowsCreateStringReference(
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(ushort*)pName,
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activatableClassId.Length,
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(IntPtr*)&header,
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&hstring));
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Marshal.ThrowExceptionForHR(
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RoGetActivationFactory(
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hstring,
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&iid,
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&factory));
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}
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return factory;
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}
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// winstring.h
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[LibraryImport("combase.dll")]
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internal static unsafe partial int WindowsCreateString(ushort* sourceString, int length, IntPtr* hstring);
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[LibraryImport("combase.dll")]
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internal static unsafe partial int WindowsCreateStringReference(ushort* sourceString, int length,
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IntPtr* hstringHeader, IntPtr* hstring);
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[LibraryImport("combase.dll")]
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internal static unsafe partial int WindowsDeleteString(IntPtr hstring);
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[LibraryImport("combase.dll")]
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internal static unsafe partial char* WindowsGetStringRawBuffer(IntPtr hstring, uint* length);
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// hstring.h
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[StructLayout(LayoutKind.Sequential)]
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internal unsafe struct HStringHeader
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{
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private fixed byte _data[24];
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}
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}
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