In libobjc/:

2010-10-15  Nicola Pero  <nicola.pero@meta-innovation.com>

        * objc-private/runtime.h (__objc_update_classes_with_methods): New.
        * class.c (__objc_update_classes_with_methods): New.
        (objc_getClassList): Do not lock the class lock.
        * methods.c (method_exchangeImplementations): New.
        (method_setImplementation): New.
        * objc/runtime.h (method_setImplementation): New.
        (method_exchangeImplementations): New.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@165525 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 20 insertions, 1 deletions

diff --git a/libobjc/objc/runtime.h b/libobjc/objc/runtime.h
index 938033148ae..bb241acd5b3 100644
--- a/libobjc/objc/runtime.h
+++ b/libobjc/objc/runtime.h
@@ -545,7 +545,26 @@ objc_EXPORT void method_getReturnType (Method method, char *returnValue,
 objc_EXPORT void method_getArgumentType (Method method, unsigned int argumentNumber,
 					 char *returnValue, size_t returnValueSize);
 
-
+/* Change the implementation of the method.  It also searches all
+   classes for any class implementing the method, and replaces the
+   existing implementation with the new one.  For that to work,
+   'method' must be a method returned by class_getInstanceMethod() or
+   class_getClassMethod() as the matching is done by comparing the
+   pointers; in that case, only the implementation in the class is
+   modified.  Return the previous implementation that has been
+   replaced.  If method or implementation is NULL, do nothing and
+   return NULL.  */
+objc_EXPORT IMP
+method_setImplementation (Method method, IMP implementation);
+
+/* Swap the implementation of two methods in a single, atomic
+   operation.  This is equivalent to getting the implementation of
+   each method and then calling method_setImplementation() on the
+   other one.  For this to work, the two methods must have been
+   returned by class_getInstanceMethod() or class_getClassMethod().
+   If 'method_a' or 'method_b' is NULL, do nothing.  */
+objc_EXPORT void
+method_exchangeImplementations (Method method_a, Method method_b);
 
 /** Implementation: the following functions are in protocols.c.  */