835 lines
26 KiB
C
835 lines
26 KiB
C
/* GNU Objective C Runtime initialization
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Copyright (C) 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
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Contributed by Kresten Krab Thorup
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+load support contributed by Ovidiu Predescu <ovidiu@net-community.com>
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 2, or (at your option) any later version.
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GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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GNU CC; see the file COPYING. If not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* As a special exception, if you link this library with files compiled with
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GCC to produce an executable, this does not cause the resulting executable
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to be covered by the GNU General Public License. This exception does not
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however invalidate any other reasons why the executable file might be
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covered by the GNU General Public License. */
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#include "runtime.h"
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/* The version number of this runtime. This must match the number
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defined in gcc (objc-act.c) */
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#define OBJC_VERSION 8
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#define PROTOCOL_VERSION 2
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/* This list contains all modules currently loaded into the runtime */
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static struct objc_list* __objc_module_list = 0; /* !T:MUTEX */
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/* This list contains all proto_list's not yet assigned class links */
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static struct objc_list* unclaimed_proto_list = 0; /* !T:MUTEX */
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/* List of unresolved static instances. */
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static struct objc_list *uninitialized_statics = 0; /* !T:MUTEX */
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/* Global runtime "write" mutex. */
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objc_mutex_t __objc_runtime_mutex = 0;
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/* Number of threads that are alive. */
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int __objc_runtime_threads_alive = 1; /* !T:MUTEX */
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/* Check compiler vs runtime version */
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static void init_check_module_version (Module_t);
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/* Assign isa links to protos */
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static void __objc_init_protocols (struct objc_protocol_list* protos);
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/* Add protocol to class */
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static void __objc_class_add_protocols (Class, struct objc_protocol_list*);
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/* This is a hook which is called by __objc_exec_class every time a class
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or a category is loaded into the runtime. This may e.g. help a
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dynamic loader determine the classes that have been loaded when
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an object file is dynamically linked in */
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void (*_objc_load_callback)(Class class, Category* category); /* !T:SAFE */
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/* Is all categories/classes resolved? */
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BOOL __objc_dangling_categories = NO; /* !T:UNUSED */
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extern SEL
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__sel_register_typed_name (const char *name, const char *types,
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struct objc_selector *orig, BOOL is_const);
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/* Sends +load to all classes and categories in certain situations. */
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static void objc_send_load (void);
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/* Inserts all the classes defined in module in a tree of classes that
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resembles the class hierarchy. This tree is traversed in preorder and the
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classes in its nodes receive the +load message if these methods were not
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executed before. The algorithm ensures that when the +load method of a class
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is executed all the superclasses have been already received the +load
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message. */
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static void __objc_create_classes_tree (Module_t module);
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static void __objc_call_callback (Module_t module);
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/* A special version that works only before the classes are completely
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installed in the runtime. */
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static BOOL class_is_subclass_of_class (Class class, Class superclass);
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typedef struct objc_class_tree {
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Class class;
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struct objc_list *subclasses; /* `head' is pointer to an objc_class_tree */
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} objc_class_tree;
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/* This is a linked list of objc_class_tree trees. The head of these trees
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are root classes (their super class is Nil). These different trees
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represent different class hierarchies. */
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static struct objc_list *__objc_class_tree_list = NULL;
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/* Keeps the +load methods who have been already executed. This hash should
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not be destroyed during the execution of the program. */
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static cache_ptr __objc_load_methods = NULL;
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/* Creates a tree of classes whose topmost class is directly inherited from
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`upper' and the bottom class in this tree is `bottom_class'. The classes
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in this tree are super classes of `bottom_class'. `subclasses' member
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of each tree node point to the next subclass tree node. */
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static objc_class_tree *
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create_tree_of_subclasses_inherited_from (Class bottom_class, Class upper)
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{
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Class superclass = bottom_class->super_class ?
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objc_lookup_class ((char*)bottom_class->super_class)
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: Nil;
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objc_class_tree *tree, *prev;
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DEBUG_PRINTF ("create_tree_of_subclasses_inherited_from:");
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DEBUG_PRINTF ("bottom_class = %s, upper = %s\n",
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(bottom_class ? bottom_class->name : NULL),
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(upper ? upper->name : NULL));
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tree = prev = objc_calloc (1, sizeof (objc_class_tree));
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prev->class = bottom_class;
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while (superclass != upper)
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{
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tree = objc_calloc (1, sizeof (objc_class_tree));
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tree->class = superclass;
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tree->subclasses = list_cons (prev, tree->subclasses);
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superclass = (superclass->super_class ?
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objc_lookup_class ((char*)superclass->super_class)
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: Nil);
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prev = tree;
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}
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return tree;
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}
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/* Insert the `class' into the proper place in the `tree' class hierarchy. This
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function returns a new tree if the class has been successfully inserted into
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the tree or NULL if the class is not part of the classes hierarchy described
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by `tree'. This function is private to objc_tree_insert_class(), you should
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not call it directly. */
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static objc_class_tree *
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__objc_tree_insert_class (objc_class_tree *tree, Class class)
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{
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DEBUG_PRINTF ("__objc_tree_insert_class: tree = %x, class = %s\n",
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tree, class->name);
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if (tree == NULL)
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return create_tree_of_subclasses_inherited_from (class, NULL);
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else if (class == tree->class)
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{
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/* `class' has been already inserted */
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DEBUG_PRINTF ("1. class %s was previously inserted\n", class->name);
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return tree;
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}
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else if ((class->super_class ?
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objc_lookup_class ((char*)class->super_class)
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: Nil)
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== tree->class)
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{
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/* If class is a direct subclass of tree->class then add class to the
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list of subclasses. First check to see if it wasn't already
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inserted. */
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struct objc_list *list = tree->subclasses;
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objc_class_tree *node;
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while (list)
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{
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/* Class has been already inserted; do nothing just return
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the tree. */
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if (((objc_class_tree*)list->head)->class == class)
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{
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DEBUG_PRINTF ("2. class %s was previously inserted\n",
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class->name);
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return tree;
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}
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list = list->tail;
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}
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/* Create a new node class and insert it into the list of subclasses */
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node = objc_calloc (1, sizeof (objc_class_tree));
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node->class = class;
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tree->subclasses = list_cons (node, tree->subclasses);
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DEBUG_PRINTF ("3. class %s inserted\n", class->name);
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return tree;
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}
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else
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{
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/* The class is not a direct subclass of tree->class. Search for class's
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superclasses in the list of subclasses. */
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struct objc_list *subclasses = tree->subclasses;
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/* Precondition: the class must be a subclass of tree->class; otherwise
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return NULL to indicate our caller that it must take the next tree. */
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if (!class_is_subclass_of_class (class, tree->class))
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return NULL;
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for (; subclasses != NULL; subclasses = subclasses->tail)
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{
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Class aClass = ((objc_class_tree*)(subclasses->head))->class;
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if (class_is_subclass_of_class (class, aClass))
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{
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/* If we found one of class's superclasses we insert the class
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into its subtree and return the original tree since nothing
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has been changed. */
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subclasses->head
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= __objc_tree_insert_class (subclasses->head, class);
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DEBUG_PRINTF ("4. class %s inserted\n", class->name);
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return tree;
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}
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}
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/* We haven't found a subclass of `class' in the `subclasses' list.
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Create a new tree of classes whose topmost class is a direct subclass
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of tree->class. */
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{
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objc_class_tree *new_tree
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= create_tree_of_subclasses_inherited_from (class, tree->class);
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tree->subclasses = list_cons (new_tree, tree->subclasses);
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DEBUG_PRINTF ("5. class %s inserted\n", class->name);
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return tree;
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}
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}
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}
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/* This function inserts `class' in the right tree hierarchy classes. */
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static void
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objc_tree_insert_class (Class class)
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{
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struct objc_list *list_node;
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objc_class_tree *tree;
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list_node = __objc_class_tree_list;
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while (list_node)
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{
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tree = __objc_tree_insert_class (list_node->head, class);
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if (tree)
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{
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list_node->head = tree;
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break;
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}
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else
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list_node = list_node->tail;
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}
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/* If the list was finished but the class hasn't been inserted, insert it
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here. */
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if (!list_node)
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{
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__objc_class_tree_list = list_cons (NULL, __objc_class_tree_list);
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__objc_class_tree_list->head = __objc_tree_insert_class (NULL, class);
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}
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}
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/* Traverse tree in preorder. Used to send +load. */
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static void
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objc_preorder_traverse (objc_class_tree *tree,
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int level,
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void (*function)(objc_class_tree*, int))
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{
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struct objc_list *node;
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(*function) (tree, level);
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for (node = tree->subclasses; node; node = node->tail)
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objc_preorder_traverse (node->head, level + 1, function);
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}
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/* Traverse tree in postorder. Used to destroy a tree. */
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static void
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objc_postorder_traverse (objc_class_tree *tree,
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int level,
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void (*function)(objc_class_tree*, int))
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{
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struct objc_list *node;
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for (node = tree->subclasses; node; node = node->tail)
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objc_postorder_traverse (node->head, level + 1, function);
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(*function) (tree, level);
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}
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/* Used to print a tree class hierarchy. */
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#ifdef DEBUG
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static void
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__objc_tree_print (objc_class_tree *tree, int level)
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{
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int i;
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for (i = 0; i < level; i++)
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printf (" ");
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printf ("%s\n", tree->class->name);
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}
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#endif
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/* Walks on a linked list of methods in the reverse order and executes all
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the methods corresponding to `op' selector. Walking in the reverse order
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assures the +load of class is executed first and then +load of categories
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because of the way in which categories are added to the class methods. */
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static void
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__objc_send_message_in_list (MethodList_t method_list, Class class, SEL op)
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{
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int i;
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if (!method_list)
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return;
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/* First execute the `op' message in the following method lists */
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__objc_send_message_in_list (method_list->method_next, class, op);
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/* Search the method list. */
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for (i = 0; i < method_list->method_count; i++)
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{
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Method_t mth = &method_list->method_list[i];
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if (mth->method_name && sel_eq (mth->method_name, op)
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&& !hash_is_key_in_hash (__objc_load_methods, mth->method_imp))
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{
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/* Add this method into the +load hash table */
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hash_add (&__objc_load_methods, mth->method_imp, mth->method_imp);
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DEBUG_PRINTF ("sending +load in class: %s\n", class->name);
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/* The method was found and wasn't previously executed. */
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(*mth->method_imp) ((id)class, mth->method_name);
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break;
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}
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}
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}
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static void
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__objc_send_load (objc_class_tree *tree, int level)
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{
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static SEL load_sel = 0;
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Class class = tree->class;
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MethodList_t method_list = class->class_pointer->methods;
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if (!load_sel)
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load_sel = sel_register_name ("load");
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__objc_send_message_in_list (method_list, class, load_sel);
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}
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static void
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__objc_destroy_class_tree_node (objc_class_tree *tree, int level)
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{
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objc_free (tree);
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}
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/* This is used to check if the relationship between two classes before the
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runtime completely installs the classes. */
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static BOOL
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class_is_subclass_of_class (Class class, Class superclass)
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{
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for (; class != Nil;)
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{
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if (class == superclass)
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return YES;
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class = (class->super_class ?
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objc_lookup_class ((char*)class->super_class)
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: Nil);
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}
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return NO;
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}
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/* This list contains all the classes in the runtime system for whom their
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superclasses are not yet know to the runtime. */
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static struct objc_list* unresolved_classes = 0;
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/* Extern function used to reference the Object and NXConstantString classes.
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*/
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extern void __objc_force_linking (void);
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void
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__objc_force_linking (void)
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{
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extern void __objc_linking (void);
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__objc_linking ();
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}
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/* Run through the statics list, removing modules as soon as all its statics
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have been initialized. */
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static void
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objc_init_statics (void)
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{
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struct objc_list **cell = &uninitialized_statics;
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struct objc_static_instances **statics_in_module;
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objc_mutex_lock(__objc_runtime_mutex);
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while (*cell)
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{
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int module_initialized = 1;
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for (statics_in_module = (*cell)->head;
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*statics_in_module; statics_in_module++)
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{
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struct objc_static_instances *statics = *statics_in_module;
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Class class = objc_lookup_class (statics->class_name);
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if (!class)
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module_initialized = 0;
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/* Actually, the static's class_pointer will be NULL when we
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haven't been here before. However, the comparison is to be
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reminded of taking into account class posing and to think about
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possible semantics... */
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else if (class != statics->instances[0]->class_pointer)
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{
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id *inst;
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for (inst = &statics->instances[0]; *inst; inst++)
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{
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(*inst)->class_pointer = class;
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/* ??? Make sure the object will not be freed. With
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refcounting, invoke `-retain'. Without refcounting, do
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nothing and hope that `-free' will never be invoked. */
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/* ??? Send the object an `-initStatic' or something to
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that effect now or later on? What are the semantics of
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statically allocated instances, besides the trivial
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NXConstantString, anyway? */
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}
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}
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}
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if (module_initialized)
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{
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/* Remove this module from the uninitialized list. */
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struct objc_list *this = *cell;
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*cell = this->tail;
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objc_free(this);
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}
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else
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cell = &(*cell)->tail;
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}
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objc_mutex_unlock(__objc_runtime_mutex);
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} /* objc_init_statics */
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/* This function is called by constructor functions generated for each
|
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module compiled. (_GLOBAL_$I$...) The purpose of this function is to
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gather the module pointers so that they may be processed by the
|
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initialization routines as soon as possible */
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void
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__objc_exec_class (Module_t module)
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{
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|
/* Have we processed any constructors previously? This flag is used to
|
|
indicate that some global data structures need to be built. */
|
|
static BOOL previous_constructors = 0;
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|
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static struct objc_list* unclaimed_categories = 0;
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|
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/* The symbol table (defined in objc-api.h) generated by gcc */
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|
Symtab_t symtab = module->symtab;
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|
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/* The statics in this module */
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struct objc_static_instances **statics
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= symtab->defs[symtab->cls_def_cnt + symtab->cat_def_cnt];
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|
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/* Entry used to traverse hash lists */
|
|
struct objc_list** cell;
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|
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/* The table of selector references for this module */
|
|
SEL selectors = symtab->refs;
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|
|
/* dummy counter */
|
|
int i;
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|
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DEBUG_PRINTF ("received module: %s\n", module->name);
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|
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/* check gcc version */
|
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init_check_module_version(module);
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|
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/* On the first call of this routine, initialize some data structures. */
|
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if (!previous_constructors)
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{
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/* Initialize thread-safe system */
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__objc_init_thread_system();
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__objc_runtime_threads_alive = 1;
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__objc_runtime_mutex = objc_mutex_allocate();
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__objc_init_selector_tables();
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__objc_init_class_tables();
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__objc_init_dispatch_tables();
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__objc_class_tree_list = list_cons (NULL, __objc_class_tree_list);
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__objc_load_methods
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= hash_new (128, (hash_func_type)hash_ptr, compare_ptrs);
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previous_constructors = 1;
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}
|
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|
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/* Save the module pointer for later processing. (not currently used) */
|
|
objc_mutex_lock(__objc_runtime_mutex);
|
|
__objc_module_list = list_cons(module, __objc_module_list);
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|
|
|
/* Replace referenced selectors from names to SEL's. */
|
|
if (selectors)
|
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{
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for (i = 0; selectors[i].sel_id; ++i)
|
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{
|
|
const char *name, *type;
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name = (char*)selectors[i].sel_id;
|
|
type = (char*)selectors[i].sel_types;
|
|
/* Constructors are constant static data so we can safely store
|
|
pointers to them in the runtime structures. is_const == YES */
|
|
__sel_register_typed_name (name, type,
|
|
(struct objc_selector*)&(selectors[i]),
|
|
YES);
|
|
}
|
|
}
|
|
|
|
/* Parse the classes in the load module and gather selector information. */
|
|
DEBUG_PRINTF ("gathering selectors from module: %s\n", module->name);
|
|
for (i = 0; i < symtab->cls_def_cnt; ++i)
|
|
{
|
|
Class class = (Class) symtab->defs[i];
|
|
const char* superclass = (char*)class->super_class;
|
|
|
|
/* Make sure we have what we think. */
|
|
assert (CLS_ISCLASS(class));
|
|
assert (CLS_ISMETA(class->class_pointer));
|
|
DEBUG_PRINTF ("phase 1, processing class: %s\n", class->name);
|
|
|
|
/* Initialize the subclass list to be NULL.
|
|
In some cases it isn't and this crashes the program. */
|
|
class->subclass_list = NULL;
|
|
|
|
/* Store the class in the class table and assign class numbers. */
|
|
__objc_add_class_to_hash (class);
|
|
|
|
/* Register all of the selectors in the class and meta class. */
|
|
__objc_register_selectors_from_class (class);
|
|
__objc_register_selectors_from_class ((Class) class->class_pointer);
|
|
|
|
/* Install the fake dispatch tables */
|
|
__objc_install_premature_dtable(class);
|
|
__objc_install_premature_dtable(class->class_pointer);
|
|
|
|
/* Register the instance methods as class methods, this is
|
|
only done for root classes. */
|
|
__objc_register_instance_methods_to_class(class);
|
|
|
|
if (class->protocols)
|
|
__objc_init_protocols (class->protocols);
|
|
|
|
/* Check to see if the superclass is known in this point. If it's not
|
|
add the class to the unresolved_classes list. */
|
|
if (superclass && !objc_lookup_class (superclass))
|
|
unresolved_classes = list_cons (class, unresolved_classes);
|
|
}
|
|
|
|
/* Process category information from the module. */
|
|
for (i = 0; i < symtab->cat_def_cnt; ++i)
|
|
{
|
|
Category_t category = symtab->defs[i + symtab->cls_def_cnt];
|
|
Class class = objc_lookup_class (category->class_name);
|
|
|
|
/* If the class for the category exists then append its methods. */
|
|
if (class)
|
|
{
|
|
|
|
DEBUG_PRINTF ("processing categories from (module,object): %s, %s\n",
|
|
module->name,
|
|
class->name);
|
|
|
|
/* Do instance methods. */
|
|
if (category->instance_methods)
|
|
class_add_method_list (class, category->instance_methods);
|
|
|
|
/* Do class methods. */
|
|
if (category->class_methods)
|
|
class_add_method_list ((Class) class->class_pointer,
|
|
category->class_methods);
|
|
|
|
if (category->protocols)
|
|
{
|
|
__objc_init_protocols (category->protocols);
|
|
__objc_class_add_protocols (class, category->protocols);
|
|
}
|
|
|
|
/* Register the instance methods as class methods, this is
|
|
only done for root classes. */
|
|
__objc_register_instance_methods_to_class(class);
|
|
}
|
|
else
|
|
{
|
|
/* The object to which the category methods belong can't be found.
|
|
Save the information. */
|
|
unclaimed_categories = list_cons(category, unclaimed_categories);
|
|
}
|
|
}
|
|
|
|
if (statics)
|
|
uninitialized_statics = list_cons (statics, uninitialized_statics);
|
|
if (uninitialized_statics)
|
|
objc_init_statics ();
|
|
|
|
/* Scan the unclaimed category hash. Attempt to attach any unclaimed
|
|
categories to objects. */
|
|
for (cell = &unclaimed_categories; *cell; )
|
|
{
|
|
Category_t category = (*cell)->head;
|
|
Class class = objc_lookup_class (category->class_name);
|
|
|
|
if (class)
|
|
{
|
|
DEBUG_PRINTF ("attaching stored categories to object: %s\n",
|
|
class->name);
|
|
|
|
list_remove_head (cell);
|
|
|
|
if (category->instance_methods)
|
|
class_add_method_list (class, category->instance_methods);
|
|
|
|
if (category->class_methods)
|
|
class_add_method_list ((Class) class->class_pointer,
|
|
category->class_methods);
|
|
|
|
if (category->protocols)
|
|
{
|
|
__objc_init_protocols (category->protocols);
|
|
__objc_class_add_protocols (class, category->protocols);
|
|
}
|
|
|
|
/* Register the instance methods as class methods, this is
|
|
only done for root classes. */
|
|
__objc_register_instance_methods_to_class(class);
|
|
}
|
|
else
|
|
cell = &(*cell)->tail;
|
|
}
|
|
|
|
if (unclaimed_proto_list && objc_lookup_class ("Protocol"))
|
|
{
|
|
list_mapcar (unclaimed_proto_list,(void(*)(void*))__objc_init_protocols);
|
|
list_free (unclaimed_proto_list);
|
|
unclaimed_proto_list = 0;
|
|
}
|
|
|
|
objc_send_load ();
|
|
|
|
objc_mutex_unlock(__objc_runtime_mutex);
|
|
}
|
|
|
|
static void objc_send_load (void)
|
|
{
|
|
if (!__objc_module_list)
|
|
return;
|
|
|
|
/* Try to find out if all the classes loaded so far also have their
|
|
superclasses known to the runtime. We suppose that the objects that are
|
|
allocated in the +load method are in general of a class declared in the
|
|
same module. */
|
|
if (unresolved_classes)
|
|
{
|
|
Class class = unresolved_classes->head;
|
|
|
|
while (objc_lookup_class ((char*)class->super_class))
|
|
{
|
|
list_remove_head (&unresolved_classes);
|
|
if (unresolved_classes)
|
|
class = unresolved_classes->head;
|
|
else
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If we still have classes for whom we don't have yet their super
|
|
* classes known to the runtime we don't send the +load messages.
|
|
*/
|
|
if (unresolved_classes)
|
|
return;
|
|
}
|
|
|
|
/* Special check to allow creating and sending messages to constant strings
|
|
in +load methods. If these classes are not yet known, even if all the
|
|
other classes are known, delay sending of +load. */
|
|
if (!objc_lookup_class ("NXConstantString") ||
|
|
!objc_lookup_class ("Object"))
|
|
return;
|
|
|
|
/* Iterate over all modules in the __objc_module_list and call on them the
|
|
__objc_create_classes_tree function. This function creates a tree of
|
|
classes that resembles the class hierarchy. */
|
|
list_mapcar (__objc_module_list, (void(*)(void*))__objc_create_classes_tree);
|
|
|
|
while (__objc_class_tree_list)
|
|
{
|
|
#ifdef DEBUG
|
|
objc_preorder_traverse (__objc_class_tree_list->head,
|
|
0, __objc_tree_print);
|
|
#endif
|
|
objc_preorder_traverse (__objc_class_tree_list->head,
|
|
0, __objc_send_load);
|
|
objc_postorder_traverse (__objc_class_tree_list->head,
|
|
0, __objc_destroy_class_tree_node);
|
|
list_remove_head (&__objc_class_tree_list);
|
|
}
|
|
|
|
list_mapcar (__objc_module_list, (void(*)(void*))__objc_call_callback);
|
|
list_free (__objc_module_list);
|
|
__objc_module_list = NULL;
|
|
}
|
|
|
|
static void
|
|
__objc_create_classes_tree (Module_t module)
|
|
{
|
|
/* The runtime mutex is locked in this point */
|
|
|
|
Symtab_t symtab = module->symtab;
|
|
int i;
|
|
|
|
/* Iterate thru classes defined in this module and insert them in the classes
|
|
tree hierarchy. */
|
|
for (i = 0; i < symtab->cls_def_cnt; i++)
|
|
{
|
|
Class class = (Class) symtab->defs[i];
|
|
|
|
objc_tree_insert_class (class);
|
|
}
|
|
}
|
|
|
|
static void
|
|
__objc_call_callback (Module_t module)
|
|
{
|
|
/* The runtime mutex is locked in this point */
|
|
|
|
Symtab_t symtab = module->symtab;
|
|
int i;
|
|
|
|
/* Iterate thru classes defined in this module and call the callback for
|
|
each one. */
|
|
for (i = 0; i < symtab->cls_def_cnt; i++)
|
|
{
|
|
Class class = (Class) symtab->defs[i];
|
|
|
|
/* Call the _objc_load_callback for this class. */
|
|
if (_objc_load_callback)
|
|
_objc_load_callback(class, 0);
|
|
}
|
|
|
|
/* Call the _objc_load_callback for categories. Don't register the instance
|
|
methods as class methods for categories to root classes since they were
|
|
already added in the class. */
|
|
for (i = 0; i < symtab->cat_def_cnt; i++)
|
|
{
|
|
Category_t category = symtab->defs[i + symtab->cls_def_cnt];
|
|
Class class = objc_lookup_class (category->class_name);
|
|
|
|
if (_objc_load_callback)
|
|
_objc_load_callback(class, category);
|
|
}
|
|
}
|
|
|
|
/* Sanity check the version of gcc used to compile `module'*/
|
|
static void init_check_module_version(Module_t module)
|
|
{
|
|
if ((module->version != OBJC_VERSION) || (module->size != sizeof (Module)))
|
|
{
|
|
int code;
|
|
|
|
if(module->version > OBJC_VERSION)
|
|
code = OBJC_ERR_OBJC_VERSION;
|
|
else if (module->version < OBJC_VERSION)
|
|
code = OBJC_ERR_GCC_VERSION;
|
|
else
|
|
code = OBJC_ERR_MODULE_SIZE;
|
|
|
|
objc_error(nil, code, "Module %s version %d doesn't match runtime %d\n",
|
|
module->name, (int)module->version, OBJC_VERSION);
|
|
}
|
|
}
|
|
|
|
static void
|
|
__objc_init_protocols (struct objc_protocol_list* protos)
|
|
{
|
|
int i;
|
|
static Class proto_class = 0;
|
|
|
|
if (! protos)
|
|
return;
|
|
|
|
objc_mutex_lock(__objc_runtime_mutex);
|
|
|
|
if (!proto_class)
|
|
proto_class = objc_lookup_class("Protocol");
|
|
|
|
if (!proto_class)
|
|
{
|
|
unclaimed_proto_list = list_cons (protos, unclaimed_proto_list);
|
|
objc_mutex_unlock(__objc_runtime_mutex);
|
|
return;
|
|
}
|
|
|
|
#if 0
|
|
assert (protos->next == 0); /* only single ones allowed */
|
|
#endif
|
|
|
|
for(i = 0; i < protos->count; i++)
|
|
{
|
|
struct objc_protocol* aProto = protos->list[i];
|
|
if (((size_t)aProto->class_pointer) == PROTOCOL_VERSION)
|
|
{
|
|
/* assign class pointer */
|
|
aProto->class_pointer = proto_class;
|
|
|
|
/* init super protocols */
|
|
__objc_init_protocols (aProto->protocol_list);
|
|
}
|
|
else if (protos->list[i]->class_pointer != proto_class)
|
|
{
|
|
objc_error(nil, OBJC_ERR_PROTOCOL_VERSION,
|
|
"Version %d doesn't match runtime protocol version %d\n",
|
|
(int)((char*)protos->list[i]->class_pointer-(char*)0),
|
|
PROTOCOL_VERSION);
|
|
}
|
|
}
|
|
|
|
objc_mutex_unlock(__objc_runtime_mutex);
|
|
}
|
|
|
|
static void __objc_class_add_protocols (Class class,
|
|
struct objc_protocol_list* protos)
|
|
{
|
|
/* Well... */
|
|
if (! protos)
|
|
return;
|
|
|
|
/* Add it... */
|
|
protos->next = class->protocols;
|
|
class->protocols = protos;
|
|
}
|