From 3170b6d37b051f42fe0b28ba2dfa54344e1c85e6 Mon Sep 17 00:00:00 2001
From: Matthias Benkard <code@mail.matthias.benkard.de>
Date: Sun, 10 Feb 2008 14:46:54 +0100
Subject: Add NSObject category ObjectiveCLWrapperLink.

darcs-hash:0a90de7a76127351a989662a577b5688fe39654c
---
 Objective-C/GNUmakefile                       |  2 +-
 Objective-C/NSObject-ObjectiveCLWrapperLink.h | 22 +++++++++++++
 Objective-C/NSObject-ObjectiveCLWrapperLink.m | 47 +++++++++++++++++++++++++++
 Objective-C/libobjcl.m                        | 39 ++++++++++++++--------
 4 files changed, 95 insertions(+), 15 deletions(-)
 create mode 100644 Objective-C/NSObject-ObjectiveCLWrapperLink.h
 create mode 100644 Objective-C/NSObject-ObjectiveCLWrapperLink.m

diff --git a/Objective-C/GNUmakefile b/Objective-C/GNUmakefile
index 598c79f..2680426 100644
--- a/Objective-C/GNUmakefile
+++ b/Objective-C/GNUmakefile
@@ -33,7 +33,7 @@ LIBRARY_NAME = libobjcl
 RPM_DISABLE_RELOCATABLE = YES
 ADDITIONAL_OBJCFLAGS = -Wall -g -DVERSION=\"$(VERSION)\" -I/usr/local/include
 
-libobjcl_OBJC_FILES = JIGS/ObjcRuntimeUtilities2.m libobjcl.m PyObjC/objc_support.m PyObjC/objc-runtime-apple.m PyObjC/objc-runtime-gnu.m PyObjC/objc-runtime-compat.m
+libobjcl_OBJC_FILES = JIGS/ObjcRuntimeUtilities2.m libobjcl.m NSObject-ObjectiveCLWrapperLink.m PyObjC/objc_support.m PyObjC/objc-runtime-apple.m PyObjC/objc-runtime-gnu.m PyObjC/objc-runtime-compat.m
 libobjcl_C_FILES = JIGS/ObjcRuntimeUtilities.c
 LIBRARIES_DEPEND_UPON = $(FND_LIBS) $(GUI_LIBS) $(OBJC_LIBS) $(SYSTEM_LIBS) $(CONFIG_SYSTEM_LIBS)
 
diff --git a/Objective-C/NSObject-ObjectiveCLWrapperLink.h b/Objective-C/NSObject-ObjectiveCLWrapperLink.h
new file mode 100644
index 0000000..9bdf902
--- /dev/null
+++ b/Objective-C/NSObject-ObjectiveCLWrapperLink.h
@@ -0,0 +1,22 @@
+/* -*- mode: objc; coding: utf-8 -*- */
+
+#import <Foundation/NSObject.h>
+
+void
+objcl_initialise_instance_wrappers (void);
+
+void
+objcl_shutdown_instance_wrappers (void);
+
+@interface NSObject (ObjectiveCLWrapperLink)
+-(const char *) __objectiveCLWrapperID;
+-(void) __setObjectiveCLWrapperID: (const char *)wrapper_id;
+-(void) __removeObjectiveCLWrapperID;
+
+/* Classes can't be wrapped at the moment. */
+/*
++(const char *) __objectiveCLWrapperID;
++(const char *) __setObjectiveCLWrapperID: (const char *)wrapper_id;
++(const char *) __removeObjectiveCLWrapperID;
+*/
+@end /* NSObject (ObjectiveCL) */
diff --git a/Objective-C/NSObject-ObjectiveCLWrapperLink.m b/Objective-C/NSObject-ObjectiveCLWrapperLink.m
new file mode 100644
index 0000000..5dac3a7
--- /dev/null
+++ b/Objective-C/NSObject-ObjectiveCLWrapperLink.m
@@ -0,0 +1,47 @@
+/* -*- mode: objc; coding: utf-8 -*- */
+
+#import "NSObject-ObjectiveCLWrapperLink.h"
+#import <Foundation/NSDictionary.h>
+#import <Foundation/NSObject.h>
+#import <Foundation/NSString.h>
+
+static NSMutableDictionary *instance_wrappers = NULL;
+
+void
+objcl_initialise_instance_wrappers (void)
+{
+  if (!instance_wrappers)
+    instance_wrappers = [[NSMutableDictionary alloc] init];
+}
+
+void
+objcl_shutdown_instance_wrappers (void)
+{
+  if (instance_wrappers)
+    {
+      [instance_wrappers release];
+      instance_wrappers = NULL;
+    }
+}
+
+@implementation NSObject (ObjectiveCLWrapperLink)
+-(const char *) __objectiveCLWrapperID
+{
+  NSString *string = [instance_wrappers objectForKey: self];
+  if (string != nil)
+    return [string UTF8String];
+  else
+    return NULL;
+}
+
+-(void) __setObjectiveCLWrapperID: (const char *)wrapper_id
+{
+  [instance_wrappers setObject: [NSString stringWithUTF8String: wrapper_id]
+                     forKey: self];
+}
+
+-(void) __removeObjectiveCLWrapperID
+{
+  [instance_wrappers removeObjectForKey: self];
+}
+@end /* NSObject (ObjectiveCL) */
diff --git a/Objective-C/libobjcl.m b/Objective-C/libobjcl.m
index c75ebea..94a3663 100644
--- a/Objective-C/libobjcl.m
+++ b/Objective-C/libobjcl.m
@@ -18,6 +18,7 @@
  */
 
 #import "libobjcl.h"
+#import "NSObject-ObjectiveCLWrapperLink.h"
 #import "PyObjC/libffi_support.h"
 #import "JIGS/ObjcRuntimeUtilities.h"
 
@@ -79,25 +80,33 @@ objcl_initialise_runtime (void)
 
   if (!method_list_lengths)
     method_list_lengths = [[NSMutableDictionary alloc] init];
+
+  objcl_initialise_instance_wrappers ();
 }
 
 
-void
-objcl_shutdown_runtime (void)
+static void
+release_unless_null (id *object)
 {
-  if (objcl_autorelease_pool)
+  if (*object)
     {
-      [objcl_autorelease_pool release];
-      objcl_autorelease_pool = NULL;
-    }
-  if (objcl_oom_exception)
-    {
-      [objcl_oom_exception release];
-      objcl_oom_exception = NULL;
+      [*object release];
+      *object = NULL;
     }
 }
 
 
+void
+objcl_shutdown_runtime (void)
+{
+  release_unless_null (&objcl_autorelease_pool);
+  release_unless_null (&objcl_oom_exception);
+  release_unless_null (&method_lists);
+  release_unless_null (&method_list_lengths);
+  objcl_shutdown_instance_wrappers ();
+}
+
+
 #ifdef USE_LIBFFI
 id
 objcl_invoke_with_types (int argc,
@@ -661,14 +670,16 @@ objcl_create_class (const char *class_name,
                       objcl_alignof_type (ivar_typespecs[i]),
                       ivar_typespecs[i]);
 
+#ifdef __OBJC2__
+  /* FIXME: What to do for the NeXT Objective-C 1.0 and GNU runtimes
+     here? */
   for (i = 0; i < protocol_number; i++)
     preclass_addProtocol (class,
-#ifdef __OBJC2__
                           objc_getProtocol ((char *) protocol_names[i])
-#else
-                          objc_getClass (protocol_names[i])
-#endif
+                          /* ??? !__OBJC2__ ???
+                             objc_getClass (protocol_names[i]) */
                           );
+#endif
 
   return class;
 #else
-- 
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