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Diff for /OpenXM_contrib/gc/Attic/finalize.c between version 1.1.1.1 and 1.1.1.2

version 1.1.1.1, 1999/11/27 10:58:32 version 1.1.1.2, 2000/04/14 11:07:58
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 /*  /*
  * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers   * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
  * Copyright (c) 1991-1996 by Xerox Corporation.  All rights reserved.   * Copyright (c) 1991-1996 by Xerox Corporation.  All rights reserved.
    * Copyright (c) 1996-1999 by Silicon Graphics.  All rights reserved.
   
  * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED   * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
  * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.   * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
Line 16 
Line 17 
 # include "gc_priv.h"  # include "gc_priv.h"
 # include "gc_mark.h"  # include "gc_mark.h"
   
   # ifdef FINALIZE_ON_DEMAND
       int GC_finalize_on_demand = 1;
   # else
       int GC_finalize_on_demand = 0;
   # endif
   
   # ifdef JAVA_FINALIZATION
       int GC_java_finalization = 1;
   # else
       int GC_java_finalization = 0;
   # endif
   
 /* Type of mark procedure used for marking from finalizable object.     */  /* Type of mark procedure used for marking from finalizable object.     */
 /* This procedure normally does not mark the object, only its           */  /* This procedure normally does not mark the object, only its           */
 /* descendents.                                                         */  /* descendents.                                                         */
Line 249  out:
Line 262  out:
   
 /* Possible finalization_marker procedures.  Note that mark stack       */  /* Possible finalization_marker procedures.  Note that mark stack       */
 /* overflow is handled by the caller, and is not a disaster.            */  /* overflow is handled by the caller, and is not a disaster.            */
 void GC_normal_finalize_mark_proc(p)  GC_API void GC_normal_finalize_mark_proc(p)
 ptr_t p;  ptr_t p;
 {  {
     hdr * hhdr = HDR(p);      hdr * hhdr = HDR(p);
Line 261  ptr_t p;
Line 274  ptr_t p;
 /* This only pays very partial attention to the mark descriptor.        */  /* This only pays very partial attention to the mark descriptor.        */
 /* It does the right thing for normal and atomic objects, and treats    */  /* It does the right thing for normal and atomic objects, and treats    */
 /* most others as normal.                                               */  /* most others as normal.                                               */
 void GC_ignore_self_finalize_mark_proc(p)  GC_API void GC_ignore_self_finalize_mark_proc(p)
 ptr_t p;  ptr_t p;
 {  {
     hdr * hhdr = HDR(p);      hdr * hhdr = HDR(p);
Line 284  ptr_t p;
Line 297  ptr_t p;
 }  }
   
 /*ARGSUSED*/  /*ARGSUSED*/
 void GC_null_finalize_mark_proc(p)  GC_API void GC_null_finalize_mark_proc(p)
 ptr_t p;  ptr_t p;
 {  {
 }  }
Line 295  ptr_t p;
Line 308  ptr_t p;
 /* in the nonthreads case, we try to avoid disabling signals,   */  /* in the nonthreads case, we try to avoid disabling signals,   */
 /* since it can be expensive.  Threads packages typically       */  /* since it can be expensive.  Threads packages typically       */
 /* make it cheaper.                                             */  /* make it cheaper.                                             */
 void GC_register_finalizer_inner(obj, fn, cd, ofn, ocd, mp)  /* The last parameter is a procedure that determines            */
   /* marking for finalization ordering.  Any objects marked       */
   /* by that procedure will be guaranteed to not have been        */
   /* finalized when this finalizer is invoked.                    */
   GC_API void GC_register_finalizer_inner(obj, fn, cd, ofn, ocd, mp)
 GC_PTR obj;  GC_PTR obj;
 GC_finalization_proc fn;  GC_finalization_proc fn;
 GC_PTR cd;  GC_PTR cd;
Line 505  void GC_finalize()
Line 522  void GC_finalize()
       for (curr_fo = fo_head[i]; curr_fo != 0; curr_fo = fo_next(curr_fo)) {        for (curr_fo = fo_head[i]; curr_fo != 0; curr_fo = fo_next(curr_fo)) {
         real_ptr = (ptr_t)REVEAL_POINTER(curr_fo -> fo_hidden_base);          real_ptr = (ptr_t)REVEAL_POINTER(curr_fo -> fo_hidden_base);
         if (!GC_is_marked(real_ptr)) {          if (!GC_is_marked(real_ptr)) {
               GC_MARKED_FOR_FINALIZATION(real_ptr);
             GC_MARK_FO(real_ptr, curr_fo -> fo_mark_proc);              GC_MARK_FO(real_ptr, curr_fo -> fo_mark_proc);
             if (GC_is_marked(real_ptr)) {              if (GC_is_marked(real_ptr)) {
                 WARN("Finalization cycle involving %lx\n", real_ptr);                  WARN("Finalization cycle involving %lx\n", real_ptr);
Line 521  void GC_finalize()
Line 539  void GC_finalize()
       while (curr_fo != 0) {        while (curr_fo != 0) {
         real_ptr = (ptr_t)REVEAL_POINTER(curr_fo -> fo_hidden_base);          real_ptr = (ptr_t)REVEAL_POINTER(curr_fo -> fo_hidden_base);
         if (!GC_is_marked(real_ptr)) {          if (!GC_is_marked(real_ptr)) {
 #         ifndef JAVA_FINALIZATION              if (!GC_java_finalization) {
             GC_set_mark_bit(real_ptr);                GC_set_mark_bit(real_ptr);
 #         endif              }
             /* Delete from hash table */              /* Delete from hash table */
               next_fo = fo_next(curr_fo);                next_fo = fo_next(curr_fo);
               if (prev_fo == 0) {                if (prev_fo == 0) {
Line 555  void GC_finalize()
Line 573  void GC_finalize()
       }        }
     }      }
   
 # ifdef JAVA_FINALIZATION    if (GC_java_finalization) {
   /* make sure we mark everything reachable from objects finalized      /* make sure we mark everything reachable from objects finalized
      using the no_order mark_proc */         using the no_order mark_proc */
     for (curr_fo = GC_finalize_now;        for (curr_fo = GC_finalize_now;
          curr_fo != NULL; curr_fo = fo_next(curr_fo)) {           curr_fo != NULL; curr_fo = fo_next(curr_fo)) {
         real_ptr = (ptr_t)curr_fo -> fo_hidden_base;          real_ptr = (ptr_t)curr_fo -> fo_hidden_base;
         if (!GC_is_marked(real_ptr)) {          if (!GC_is_marked(real_ptr)) {
             if (curr_fo -> fo_mark_proc == GC_null_finalize_mark_proc) {              if (curr_fo -> fo_mark_proc == GC_null_finalize_mark_proc) {
                 GC_MARK_FO(real_ptr, GC_normal_finalize_mark_proc);                  GC_MARK_FO(real_ptr, GC_normal_finalize_mark_proc);
             }              }
             GC_set_mark_bit(real_ptr);              GC_set_mark_bit(real_ptr);
         }          }
     }        }
 # endif    }
   
   /* Remove dangling disappearing links. */    /* Remove dangling disappearing links. */
     for (i = 0; i < dl_size; i++) {      for (i = 0; i < dl_size; i++) {
Line 594  void GC_finalize()
Line 612  void GC_finalize()
     }      }
 }  }
   
 #ifdef JAVA_FINALIZATION  #ifndef JAVA_FINALIZATION_NOT_NEEDED
   
 /* Enqueue all remaining finalizers to be run - Assumes lock is  /* Enqueue all remaining finalizers to be run - Assumes lock is
  * held, and signals are disabled */   * held, and signals are disabled */
Line 649  void GC_enqueue_all_finalizers()
Line 667  void GC_enqueue_all_finalizers()
  * Unfortunately, the Java standard implies we have to keep running   * Unfortunately, the Java standard implies we have to keep running
  * finalizers until there are no more left, a potential infinite loop.   * finalizers until there are no more left, a potential infinite loop.
  * YUCK.   * YUCK.
    * Note that this is even more dangerous than the usual Java
    * finalizers, in that objects reachable from static variables
    * may have been finalized when these finalizers are run.
    * Finalizers run at this point must be prepared to deal with a
    * mostly broken world.
  * This routine is externally callable, so is called without   * This routine is externally callable, so is called without
  * the allocation lock.   * the allocation lock.
  */   */
 void GC_finalize_all()  GC_API void GC_finalize_all()
 {  {
     DCL_LOCK_STATE;      DCL_LOCK_STATE;
   
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  Added in v.1.1.1.2
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