objc4-235.tar.gz

[apple/objc4.git] / runtime / objc-exception.h

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+/*
+ * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+ 
+//  objc_exception.h
+//  Support for Objective-C language Exceptions
+//
+//  Created by Blaine Garst on Fri Nov 01 2002.
+//  Copyright (c) 2002-3 Apple Computer, Inc. All rights reserved.
+//
+
+#ifndef __OBJC_EXCEPTION_H_
+#define __OBJC_EXCEPTION_H_
+
+#import "objc/objc-class.h"
+
+// compiler reserves a setjmp buffer + 4 words as localExceptionData
+
+OBJC_EXPORT void objc_exception_throw(id exception);
+OBJC_EXPORT void objc_exception_try_enter(void *localExceptionData);
+OBJC_EXPORT void objc_exception_try_exit(void *localExceptionData);
+OBJC_EXPORT id objc_exception_extract(void *localExceptionData);
+OBJC_EXPORT int objc_exception_match(Class exceptionClass, id exception);
+
+
+typedef struct {
+    int version;
+    void (*throw_exc)(id);             // version 0
+    void (*try_enter)(void *); // version 0
+    void (*try_exit)(void *);  // version 0
+    id  (*extract)(void *);    // version 0
+    int        (*match)(Class, id);    // version 0
+}
+    objc_exception_functions_t;
+
+// get table; version tells how many
+OBJC_EXPORT void objc_exception_get_functions(objc_exception_functions_t *table);
+
+// set table
+OBJC_EXPORT void objc_exception_set_functions(objc_exception_functions_t *table);
+
+#endif  // __OBJC_EXCEPTION_H_
+