[banshee] [Hyena] Add ThreadAssist.BlockingProxyToMain func

[Gabriel Burt <gburt src gnome org>]

commit e19b757ae3144defcf4f130fb7a74660e199741a
Author: Gabriel Burt <gabriel burt gmail com>
Date:   Fri Nov 27 16:21:02 2009 -0800

    [Hyena] Add ThreadAssist.BlockingProxyToMain func

 .../Banshee.Services/Banshee.Base/ThreadAssist.cs  |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/src/Core/Banshee.Services/Banshee.Base/ThreadAssist.cs b/src/Core/Banshee.Services/Banshee.Base/ThreadAssist.cs
index 9344230..43fad7c 100644
--- a/src/Core/Banshee.Services/Banshee.Base/ThreadAssist.cs
+++ b/src/Core/Banshee.Services/Banshee.Base/ThreadAssist.cs
@@ -69,6 +69,25 @@ namespace Banshee.Base
             }
         }
 
+        public static void BlockingProxyToMain (InvokeHandler handler)
+        {
+            if (!InMainThread) {
+                var reset_event = new System.Threading.ManualResetEvent (false);
+
+                Banshee.ServiceStack.Application.Invoke (delegate {
+                    try {
+                        handler ();
+                    } finally {
+                        reset_event.Set ();
+                    }
+                });
+
+                reset_event.WaitOne ();
+            } else {
+                handler ();
+            }
+        }
+
         public static void ProxyToMain (InvokeHandler handler)
         {
             if (!InMainThread) {