Vlc.DotNet处理过WPF停止死锁和扩张了Public函数的代码/Vlc.DotNet.Core.Interops/VlcManager.Dialogs.cs

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using System;
using System.Runtime.InteropServices;
using Vlc.DotNet.Core.Interops.Signatures;

namespace Vlc.DotNet.Core.Interops
{
    public sealed partial class VlcManager
    {
        private DialogCallbacks? dialogCallbacks;

        private IntPtr dialogCallbacksPointer;

        /// <summary>
        /// Register callbacks in order to handle VLC dialogs. LibVLC 3.0.0 and later.
        /// </summary>
        public void SetDialogCallbacks(DialogCallbacks? callbacks, IntPtr data)
        {
            if (VlcVersionNumber.Major < 3)
            {
                throw new InvalidOperationException($"You need VLC version 3.0 or higher to be able to use {nameof(SetDialogCallbacks)}");
            }

            if (this.dialogCallbacks.HasValue)
            {
                Marshal.FreeHGlobal(this.dialogCallbacksPointer);
                this.dialogCallbacksPointer = IntPtr.Zero;
            }

            this.dialogCallbacks = callbacks;
            if (this.dialogCallbacks.HasValue)
            {
                this.dialogCallbacksPointer = Marshal.AllocHGlobal(MarshalHelper.SizeOf<DialogCallbacks>());
                Marshal.StructureToPtr(this.dialogCallbacks.Value, this.dialogCallbacksPointer, false);
            }

            myLibraryLoader.GetInteropDelegate<SetDialogCallbacks>().Invoke(this.myVlcInstance, this.dialogCallbacksPointer, data);
        }

        /// <summary>
        /// Associate an opaque pointer with the dialog id
        /// </summary>
        public void SetDialogContext(IntPtr dialogId, IntPtr data)
        {
            if (VlcVersionNumber.Major < 3)
            {
                throw new InvalidOperationException($"You need VLC version 3.0 or higher to be able to use {nameof(SetDialogContext)}");
            }

            myLibraryLoader.GetInteropDelegate<SetDialogContext>().Invoke(dialogId, data);
        }


        /// <summary>
        /// Return the opaque pointer associated with the dialog id
        /// </summary>
        public IntPtr GetDialogContext(IntPtr dialogId)
        {
            if (VlcVersionNumber.Major < 3)
            {
                throw new InvalidOperationException($"You need VLC version 3.0 or higher to be able to use {nameof(GetDialogContext)}");