libjava/java/lang/Object.h

   1 // Object.h - Header file for java.lang.Object.  -*- c++ -*-
   2
   3 /* Copyright (C) 1998, 1999, 2000, 2001  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 #ifndef __JAVA_LANG_OBJECT_H__
  12 #define __JAVA_LANG_OBJECT_H__
  13
  14 #pragma interface
  15
  16 #include <gcj/javaprims.h>
  17
  18 // This class is mainly here as a kludge to get G++ to allocate two
  19 // extra entries in each vtable.
  20 struct _JvObjectPrefix
  21 {
  22 protected:
  23   // New ABI Compatibility Dummy, #1 and 2.
  24   virtual void nacd_1 (void) {}; // This slot really contains the Class pointer.
  25   // For IA64, the GC descriptor goes into the second word of the nacd1 descr.
  26 # ifndef __ia64__
  27     virtual void nacd_2 (void) {}; // Actually the GC bitmap marking descriptor.
  28 # endif
  29 };
  30
  31 class java::lang::Object : public _JvObjectPrefix
  32 {
  33 protected:
  34   virtual void finalize (void);
  35 public:
  36   // Order must match order in Object.java.
  37   jclass getClass (void);
  38   virtual jint hashCode (void);
  39   void notify (void);
  40   void notifyAll (void);
  41   void wait (jlong timeout, jint nanos);
  42   virtual jboolean equals (jobject obj);
  43   Object (void);
  44   virtual jstring toString (void);
  45   void wait (void);
  46   void wait (jlong timeout);
  47
  48   friend void _Jv_MonitorEnter (jobject obj);
  49   friend void _Jv_MonitorExit (jobject obj);
  50   friend void _Jv_InitializeSyncMutex (void);
  51   friend void _Jv_FinalizeObject (jobject obj);
  52
  53 #ifdef JV_MARKOBJ_DECL
  54   friend JV_MARKOBJ_DECL;
  55 #endif
  56 #ifdef JV_MARKARRAY_DECL
  57   friend JV_MARKARRAY_DECL;
  58 #endif
  59
  60   static java::lang::Class class$;
  61
  62 protected:
  63   virtual jobject clone (void);
  64
  65 private:
  66   // This does not actually refer to a Java object.  Instead it is a
  67   // placeholder for a piece of internal data (the synchronization
  68   // information).
  69 # ifndef JV_HASH_SYNCHRONIZATION
  70     jobject sync_info;
  71 # endif
  72
  73     // Initialize the sync_info field.  Not called with JV_HASH_SYNCHRONIZATION.
  74     void sync_init (void);
  75 };
  76
  77 #endif /* __JAVA_LANG_OBJECT_H__ */