avoid unnecessary requests for signatures to remote process

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@29652 72102866-910b-0410-8b05-ffd578937521

ChangeLog

@@ -1,3 +1,9 @@
+2010-02-16 Richard Frith-Macdonald <rfm@gnu.org>
+
+	* Source/NSDistantObject.m:
+	Cache method signatures to avoid asking remote end for them
+	repeatedly.
+
 2010-02-16  Wolfgang Lux  <wolfgang.lux@gmail.com>
 
 	* Source/Additions/Unicode.m (GSToUnicode): Fix bug where

Headers/Foundation/NSDistantObject.h

@@ -44,7 +44,7 @@ extern "C" {
   unsigned	_handle;
   Protocol	*_protocol;
   unsigned	_counter;
-  void		*_unused;
+  void		*_sigs;
 #endif
 }
 

Source/NSDistantObject.m

@@ -32,6 +32,7 @@
 #import "GNUstepBase/DistributedObjects.h"
 #import "GNUstepBase/GSObjCRuntime.h"
 #import "Foundation/NSDebug.h"
+#import "Foundation/NSDictionary.h"
 #import "Foundation/NSLock.h"
 #import "Foundation/NSPort.h"
 #import "Foundation/NSMethodSignature.h"
@@ -467,6 +468,7 @@ enum proxyLocation
 - (void) dealloc
 {
   [self finalize];
+  if (_sigs != 0) [(NSMutableDictionary*)_sigs release];
   [super dealloc];
 }
 
@@ -752,6 +754,15 @@ enum proxyLocation
 	    return [NSMethodSignature signatureWithObjCTypes: types];
 	}
 
+      if (_sigs != 0)
+	{
+	  NSMutableDictionary	*d = (NSMutableDictionary*)_sigs;
+	  NSString		*s = NSStringFromSelector(aSelector);
+	  NSMethodSignature	*m = [d objectForKey: s];
+
+	  if (m != nil) return m;
+	}
+
 	{
 	  id		m = nil;
 	  id		inv;
@@ -768,6 +779,18 @@ enum proxyLocation
 	       */
 	      m = [NSMethodSignature signatureWithObjCTypes: types];
 	    }
+	  if (m != nil)
+	    {
+	      NSMutableDictionary	*d = (NSMutableDictionary*)_sigs;
+	      NSString			*s = NSStringFromSelector(aSelector);
+
+	      if (d == nil)
+		{
+		  d = [NSMutableDictionary new];
+		  _sigs = (void*)d;
+		}
+	      [d setObject: m forKey: s];
+	    }
 	  return m;
 	}
     }