Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -50,10 +50,13 @@
 	AC_DEFINE(OF_APPLE_RUNTIME, 1, [Whether we use the Apple ObjC runtime])
 	AC_SUBST(RUNTIME_DEF, "-DOF_APPLE_RUNTIME")
 	objc_runtime="Apple"])
 AC_MSG_RESULT($objc_runtime)
 
+AC_CHECK_FUNC(objc_getProperty,, [
+	AC_SUBST(OBJC_PROPERTIES_M, "objc_properties.m")])
+
 AC_CHECK_FUNC(objc_enumerationMutation, [
 	AC_DEFINE(HAVE_OBJC_ENUMERATIONMUTATION, 1,
 		[Whether we have objc_enumerationMutation])])
 
 BUILDSYS_LIB

Index: extra.mk.in
==================================================================
--- extra.mk.in
+++ extra.mk.in
@@ -1,8 +1,9 @@
 ASPRINTF_M = @ASPRINTF_M@
+OBJC_PROPERTIES_M = @OBJC_PROPERTIES_M@
 OBJC_SYNC_M = @OBJC_SYNC_M@
 OFPLUGIN_M = @OFPLUGIN_M@
 OFTHREAD_M = @OFTHREAD_M@
 TESTPLUGIN = @TESTPLUGIN@
 TESTS = @TESTS@
 TEST_LAUNCHER = @TEST_LAUNCHER@
 THREADING_H = @THREADING_H@

Index: src/Makefile
==================================================================
--- src/Makefile
+++ src/Makefile
@@ -36,15 +36,16 @@
 	    ObjFW.h		\
 	    asprintf.h		\
 	    objfw-defs.h	\
 	    ${THREADING_H}
 
-SRCS += ${OBJC_SYNC_M}	\
-	${ASPRINTF_M}	\
-	iso_8859_15.m	\
-	windows_1252.m
+SRCS += ${AS_PRINTF_M} 		\
+	iso_8859_15.m		\
+	windows_1252.m		\
+	${OBJC_PROPERTIES_M}	\
+	${OBJC_SYNC_M}
 
 include ../buildsys.mk
 
 CPPFLAGS += -I..
 OBJCFLAGS += ${LIB_CFLAGS}
 LD = ${OBJC}

ADDED   src/objc_properties.m
Index: src/objc_properties.m
==================================================================
--- src/objc_properties.m
+++ src/objc_properties.m
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2008 - 2009
+ *   Jonathan Schleifer <js@webkeks.org>
+ *
+ * All rights reserved.
+ *
+ * This file is part of ObjFW. It may be distributed under the terms of the
+ * Q Public License 1.0, which can be found in the file LICENSE included in
+ * the packaging of this file.
+ */
+
+#include "config.h"
+
+#import <objc/objc.h>
+
+#import "OFExceptions.h"
+
+id
+objc_getProperty(id self, SEL _cmd, ptrdiff_t offset, BOOL atomic)
+{
+	if (atomic) {
+		@synchronized (self) {
+			id ptr = *(id*)((char*)self + offset);
+			return [[ptr retain] autorelease];
+		}
+	}
+
+	return [[*(id*)((char*)self + offset) retain] autorelease];
+}
+
+void
+objc_setProperty(id self, SEL _cmd, ptrdiff_t offset, id value, BOOL atomic,
+    BOOL copy)
+{
+	if (atomic) {
+		@synchronized ((atomic ? self : nil)) {
+			id *ptr = (id*)((char*)self + offset);
+			id old = *ptr;
+
+			*ptr = (copy ? [value copy] : [value retain]);
+			[old release];
+		}
+	}
+
+	id *ptr = (id*)((char*)self + offset);
+	id old = *ptr;
+
+	*ptr = (copy ? [value copy] : [value retain]);
+	[old release];
+}