added OSX convenience method

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@36966 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,10 @@
+2013-08-12  Richard Frith-Macdonald <rfm@gnu.org>
+
+        * Headers/Foundation/NSThread.h:
+        * Source/NSThread.m:
+        Added ([-performSelectorInBackground:withObject:]) convenience method
+        from OSX 10.5
+
 2013-08-10  Ivan Vucica <ivan@vucica.net>
 
 	* Source/NSPathUtilities.m:

Headers/Foundation/NSThread.h

@@ -315,6 +315,13 @@ extern "C" {
                 onThread: (NSThread*)aThread
               withObject: (id)anObject
            waitUntilDone: (BOOL)aFlag;
+
+/**
+ * Creates and runs a new background thread sending aSelector to the receiver
+ * and passing anObject (which may be nil) as the argument.
+ */
+- (void) performSelectorInBackground: (SEL)aSelector
+                          withObject: (id)anObject; 
 #endif
 @end
 

Source/NSThread.m

@@ -1303,6 +1303,15 @@ GSRunLoopInfoForThread(NSThread *aThread)
           waitUntilDone: aFlag
                   modes: commonModes()];
 }
+
+- (void) performSelectorInBackground: (SEL)aSelector 
+                          withObject: (id)anObject
+{
+  [NSThread detachNewThreadSelector: aSelector
+                           toTarget: self
+                         withObject: anObject];
+}
+
 @end
 
 /**