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Diffstat (limited to 'gstreamer-sharp/glib-sharp/DestroyNotify.cs')
| -rw-r--r-- | gstreamer-sharp/glib-sharp/DestroyNotify.cs | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/gstreamer-sharp/glib-sharp/DestroyNotify.cs b/gstreamer-sharp/glib-sharp/DestroyNotify.cs new file mode 100644 index 0000000..f11dbc5 --- /dev/null +++ b/gstreamer-sharp/glib-sharp/DestroyNotify.cs @@ -0,0 +1,52 @@ +// GLib.DestroyNotify.cs - internal DestroyNotify helper +// +// Author: Mike Kestner <mkestner@novell.com> +// +// Copyright (c) 2005 Novell, Inc. +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of version 2 of the Lesser GNU General +// Public License as published by the Free Software Foundation. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this program; if not, write to the +// Free Software Foundation, Inc., 59 Temple Place - Suite 330, +// Boston, MA 02111-1307, USA. + +namespace GLib { + + using System; + using System.Runtime.InteropServices; + + [UnmanagedFunctionPointer (CallingConvention.Cdecl)] + public delegate void DestroyNotify (IntPtr data); + + public class DestroyHelper { + + private DestroyHelper () {} + + static void ReleaseGCHandle (IntPtr data) + { + if (data == IntPtr.Zero) + return; + GCHandle gch = (GCHandle) data; + gch.Free (); + } + + static DestroyNotify release_gchandle; + + public static DestroyNotify NotifyHandler { + get { + if (release_gchandle == null) + release_gchandle = new DestroyNotify (ReleaseGCHandle); + return release_gchandle; + } + } + } +} + |