diff options
Diffstat (limited to 'src/mscorlib/src/System/Runtime/InteropServices/ComEventsInfo.cs')
-rw-r--r-- | src/mscorlib/src/System/Runtime/InteropServices/ComEventsInfo.cs | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/Runtime/InteropServices/ComEventsInfo.cs b/src/mscorlib/src/System/Runtime/InteropServices/ComEventsInfo.cs new file mode 100644 index 0000000000..6feb52445d --- /dev/null +++ b/src/mscorlib/src/System/Runtime/InteropServices/ComEventsInfo.cs @@ -0,0 +1,92 @@ +// Licensed to the .NET Foundation under one or more agreements. +// The .NET Foundation licenses this file to you under the MIT license. +// See the LICENSE file in the project root for more information. + + +/*============================================================ +** +** +** Purpose: part of ComEventHelpers APIs which allow binding +** managed delegates to COM's connection point based events. +** +**/ + +namespace System.Runtime.InteropServices { + + using System; + using ComTypes = System.Runtime.InteropServices.ComTypes; + + // see code:ComEventsHelper#ComEventsArchitecture + [System.Security.SecurityCritical] + internal class ComEventsInfo { + + +#region fields + + private ComEventsSink _sinks; + private object _rcw; + +#endregion + + +#region ctor/dtor + + ComEventsInfo(object rcw) { + _rcw = rcw; + } + + [System.Security.SecuritySafeCritical] + ~ComEventsInfo() { + // see code:ComEventsHelper#ComEventsFinalization + _sinks = ComEventsSink.RemoveAll(_sinks); + } + +#endregion + + +#region static methods + + [System.Security.SecurityCritical] + internal static ComEventsInfo Find(object rcw) { + return (ComEventsInfo)Marshal.GetComObjectData(rcw, typeof(ComEventsInfo)); + } + + // it is caller's responsibility to call this method under lock(rcw) + [System.Security.SecurityCritical] + internal static ComEventsInfo FromObject(object rcw) { + ComEventsInfo eventsInfo = Find(rcw); + if (eventsInfo == null) { + eventsInfo = new ComEventsInfo(rcw); + Marshal.SetComObjectData(rcw, typeof(ComEventsInfo), eventsInfo); + } + return eventsInfo; + } + +#endregion + + +#region internal methods + + internal ComEventsSink FindSink(ref Guid iid) { + return ComEventsSink.Find(_sinks, ref iid); + } + + // it is caller's responsibility to call this method under lock(rcw) + internal ComEventsSink AddSink(ref Guid iid) { + ComEventsSink sink = new ComEventsSink(_rcw, iid); + _sinks = ComEventsSink.Add(_sinks, sink); + + return _sinks; + } + + // it is caller's responsibility to call this method under lock(rcw) + [System.Security.SecurityCritical] + internal ComEventsSink RemoveSink(ComEventsSink sink) { + _sinks = ComEventsSink.Remove(_sinks, sink); + return _sinks; + } + +#endregion + + } +} |