X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=avahi-sharp%2FHostNameResolver.cs;h=d522cea66425594164784853b41254b979d55f6d;hb=264700bf97de2e4430494cb41201950162fba020;hp=62f4149e0572063f079b1e4db5523a4e92690435;hpb=ba12decc4413dedf22c06545d1ec5938efa8954a;p=catta

diff --git a/avahi-sharp/HostNameResolver.cs b/avahi-sharp/HostNameResolver.cs
index 62f4149..d522cea 100644
--- a/avahi-sharp/HostNameResolver.cs
+++ b/avahi-sharp/HostNameResolver.cs
@@ -1,3 +1,24 @@
+/* $Id$ */
+
+/***
+  This file is part of avahi.
+
+  avahi is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+
+  avahi 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 avahi; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
 using System;
 using System.Collections;
 using System.Net;
@@ -19,6 +40,7 @@ namespace Avahi
         private Protocol proto;
         private string hostname;
         private Protocol aproto;
+        private HostNameResolverCallback cb;
 
         private IPAddress currentAddress;
         private string currentHost;
@@ -81,6 +103,7 @@ namespace Avahi
             this.proto = proto;
             this.hostname = hostname;
             this.aproto = aproto;
+            cb = OnHostNameResolverCallback;
         }
 
         ~HostNameResolver ()
@@ -95,20 +118,29 @@ namespace Avahi
 
         private void Start ()
         {
-            if (handle != IntPtr.Zero || (foundListeners.Count == 0 && timeoutListeners.Count == 0))
+            if (client.Handle == IntPtr.Zero || handle != IntPtr.Zero ||
+                (foundListeners.Count == 0 && timeoutListeners.Count == 0))
                 return;
 
             IntPtr hostPtr = Utility.StringToPtr (hostname);
-            handle = avahi_host_name_resolver_new (client.Handle, iface, proto, hostPtr, aproto,
-                                                   OnHostNameResolverCallback, IntPtr.Zero);
+
+            lock (client) {
+                handle = avahi_host_name_resolver_new (client.Handle, iface, proto, hostPtr, aproto,
+                                                       cb, IntPtr.Zero);
+            }
+            
             Utility.Free (hostPtr);
         }
 
         private void Stop (bool force)
         {
-            if (handle != IntPtr.Zero && (force || (foundListeners.Count == 0 && timeoutListeners.Count == 0))) {
-                avahi_host_name_resolver_free (handle);
-                handle = IntPtr.Zero;
+            if (client.Handle != IntPtr.Zero && handle != IntPtr.Zero &&
+                (force || (foundListeners.Count == 0 && timeoutListeners.Count == 0))) {
+
+                lock (client) {
+                    avahi_host_name_resolver_free (handle);
+                    handle = IntPtr.Zero;
+                }
             }
         }