using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using Mono.Interop;

namespace System
{
	// Token: 0x020006C3 RID: 1731
	internal class __ComObject : MarshalByRefObject
	{
		// Token: 0x06004184 RID: 16772 RVA: 0x000DE718 File Offset: 0x000DC918
		public __ComObject()
		{
			this.Initialize(base.GetType());
		}

		// Token: 0x06004185 RID: 16773 RVA: 0x000DE72C File Offset: 0x000DC92C
		internal __ComObject(Type t)
		{
			this.Initialize(t);
		}

		// Token: 0x06004186 RID: 16774 RVA: 0x000DE73C File Offset: 0x000DC93C
		internal __ComObject(IntPtr pItf)
		{
			Guid iid_IUnknown = __ComObject.IID_IUnknown;
			int num = Marshal.QueryInterface(pItf, ref iid_IUnknown, out this.iunknown);
			Marshal.ThrowExceptionForHR(num);
		}

		// Token: 0x06004187 RID: 16775
		[MethodImpl(MethodImplOptions.InternalCall)]
		internal static extern __ComObject CreateRCW(Type t);

		// Token: 0x06004188 RID: 16776
		[MethodImpl(MethodImplOptions.InternalCall)]
		private extern void ReleaseInterfaces();

		// Token: 0x06004189 RID: 16777 RVA: 0x000DE76C File Offset: 0x000DC96C
		~__ComObject()
		{
			this.ReleaseInterfaces();
		}

		// Token: 0x0600418A RID: 16778 RVA: 0x000DE7A8 File Offset: 0x000DC9A8
		internal void Initialize(Type t)
		{
			if (this.iunknown != IntPtr.Zero)
			{
				return;
			}
			ObjectCreationDelegate objectCreationCallback = ExtensibleClassFactory.GetObjectCreationCallback(t);
			if (objectCreationCallback != null)
			{
				this.iunknown = objectCreationCallback(IntPtr.Zero);
				if (this.iunknown == IntPtr.Zero)
				{
					throw new COMException(string.Format("ObjectCreationDelegate for type {0} failed to return a valid COM object", t));
				}
			}
			else
			{
				int num = __ComObject.CoCreateInstance(__ComObject.GetCLSID(t), IntPtr.Zero, 21U, __ComObject.IID_IUnknown, out this.iunknown);
				Marshal.ThrowExceptionForHR(num);
			}
		}

		// Token: 0x0600418B RID: 16779 RVA: 0x000DE838 File Offset: 0x000DCA38
		private static Guid GetCLSID(Type t)
		{
			if (t.IsImport)
			{
				return t.GUID;
			}
			for (Type type = t.BaseType; type != typeof(object); type = type.BaseType)
			{
				if (type.IsImport)
				{
					return type.GUID;
				}
			}
			throw new COMException("Could not find base COM type for type " + t.ToString());
		}

		// Token: 0x0600418C RID: 16780
		[MethodImpl(MethodImplOptions.InternalCall)]
		internal extern IntPtr GetInterfaceInternal(Type t, bool throwException);

		// Token: 0x0600418D RID: 16781 RVA: 0x000DE8A4 File Offset: 0x000DCAA4
		internal IntPtr GetInterface(Type t, bool throwException)
		{
			this.CheckIUnknown();
			return this.GetInterfaceInternal(t, throwException);
		}

		// Token: 0x0600418E RID: 16782 RVA: 0x000DE8B4 File Offset: 0x000DCAB4
		internal IntPtr GetInterface(Type t)
		{
			return this.GetInterface(t, true);
		}

		// Token: 0x0600418F RID: 16783 RVA: 0x000DE8C0 File Offset: 0x000DCAC0
		private void CheckIUnknown()
		{
			if (this.iunknown == IntPtr.Zero)
			{
				throw new InvalidComObjectException("COM object that has been separated from its underlying RCW cannot be used.");
			}
		}

		// Token: 0x17000C13 RID: 3091
		// (get) Token: 0x06004190 RID: 16784 RVA: 0x000DE8F0 File Offset: 0x000DCAF0
		internal IntPtr IUnknown
		{
			get
			{
				if (this.iunknown == IntPtr.Zero)
				{
					throw new InvalidComObjectException("COM object that has been separated from its underlying RCW cannot be used.");
				}
				return this.iunknown;
			}
		}

		// Token: 0x17000C14 RID: 3092
		// (get) Token: 0x06004191 RID: 16785 RVA: 0x000DE924 File Offset: 0x000DCB24
		internal IntPtr IDispatch
		{
			get
			{
				IntPtr @interface = this.GetInterface(typeof(IDispatch));
				if (@interface == IntPtr.Zero)
				{
					throw new InvalidComObjectException("COM object that has been separated from its underlying RCW cannot be used.");
				}
				return @interface;
			}
		}

		// Token: 0x17000C15 RID: 3093
		// (get) Token: 0x06004192 RID: 16786 RVA: 0x000DE960 File Offset: 0x000DCB60
		internal static Guid IID_IUnknown
		{
			get
			{
				return new Guid("00000000-0000-0000-C000-000000000046");
			}
		}

		// Token: 0x17000C16 RID: 3094
		// (get) Token: 0x06004193 RID: 16787 RVA: 0x000DE96C File Offset: 0x000DCB6C
		internal static Guid IID_IDispatch
		{
			get
			{
				return new Guid("00020400-0000-0000-C000-000000000046");
			}
		}

		// Token: 0x06004194 RID: 16788 RVA: 0x000DE978 File Offset: 0x000DCB78
		public override bool Equals(object obj)
		{
			this.CheckIUnknown();
			if (obj == null)
			{
				return false;
			}
			__ComObject _ComObject = obj as __ComObject;
			return _ComObject != null && this.iunknown == _ComObject.IUnknown;
		}

		// Token: 0x06004195 RID: 16789 RVA: 0x000DE9B4 File Offset: 0x000DCBB4
		public override int GetHashCode()
		{
			this.CheckIUnknown();
			return this.iunknown.ToInt32();
		}

		// Token: 0x06004196 RID: 16790
		[DllImport("ole32.dll", CallingConvention = CallingConvention.StdCall, ExactSpelling = true)]
		private static extern int CoCreateInstance([MarshalAs(UnmanagedType.LPStruct)] [In] Guid rclsid, IntPtr pUnkOuter, uint dwClsContext, [MarshalAs(UnmanagedType.LPStruct)] [In] Guid riid, out IntPtr pUnk);

		// Token: 0x04001A42 RID: 6722
		private IntPtr iunknown;

		// Token: 0x04001A43 RID: 6723
		private IntPtr hash_table;
	}
}