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clean up, rearrange allocation statistics code -------------------- ChangeLog entries follow: -------------------- src/ChangeLog addition: 2010-03-21 Ben Wing <ben@xemacs.org> * alloc.c: * alloc.c (assert_proper_sizing): * alloc.c (c_readonly): * alloc.c (malloced_storage_size): * alloc.c (fixed_type_block_overhead): * alloc.c (lisp_object_storage_size): * alloc.c (inc_lrecord_stats): * alloc.c (dec_lrecord_stats): * alloc.c (pluralize_word): * alloc.c (object_memory_usage_stats): * alloc.c (Fobject_memory_usage): * alloc.c (compute_memusage_stats_length): * alloc.c (disksave_object_finalization_1): * alloc.c (Fgarbage_collect): * mc-alloc.c: * mc-alloc.c (mc_alloced_storage_size): * mc-alloc.h: No functionality change here. Collect the allocations-statistics code that was scattered throughout alloc.c into one place. Add remaining section headings so that all sections have headings clearly identifying the start of the section and its purpose. Expose mc_alloced_storage_size() even when not MEMORY_USAGE_STATS; this fixes build problems and is related to the export of lisp_object_storage_size() and malloced_storage_size() when non-MEMORY_USAGE_STATS in the previous change set.
author Ben Wing <ben@xemacs.org>
date Sun, 21 Mar 2010 04:41:49 -0500
parents fdefd0186b75
children 308d34e9f07d
line wrap: on
line source

/* Fixed-size block allocator.
   Copyright (C) 1994 Free Software Foundation, Inc.

This file is part of XEmacs.

XEmacs is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.

XEmacs is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/

/* Synched up with: Not in FSF. */

/* Authorship:

   Ben Wing: December 1994, for 19.12.
 */

/*

------------------------------------------------------------------------------

A "block-type object" is used to efficiently allocate and free blocks
of a particular size.  Freed blocks are remembered in a free list and
are reused as necessary to allocate new blocks, so as to avoid as
much as possible making calls to malloc() and free().

This is a container object.  Declare a block-type object of a specific type
as follows:

struct mytype_blocktype {
  Blocktype_declare (mytype);
};

Use the following functions/macros:

   structype *Blocktype_new(structype)
      [MACRO] Create a new block-type object of the specified type.
      The argument to this call should be the type of object to be
      created, e.g. foobar_blocktype.
   type *Blocktype_alloc(b)
      [MACRO] Allocate a block of the proper type for the specified
      block-type object and return a pointer to it.
   Blocktype_free(b, block)
      Free a block of the type corresponding to the specified block-type
      object.
   Blocktype_delete(b)
      Destroy a block-type object and the memory allocated to it.

*/

/* This file has been Mule-ized. */

#include <config.h>
#include "lisp.h"

#include "blocktype.h"

typedef struct blocktype
{
  Blocktype_declare (void);
} Blocktype;

struct block_internal
{
  void *next;
};

void *
Blocktype_newf (Bytecount elsize)
{
  Blocktype *b = xnew (Blocktype);
  b->elsize = max (elsize, (Bytecount) sizeof (void *));
  b->free = 0;
  return (void *) b;
}

void
Blocktype_allocf (void *bbb)
{
  Blocktype *b = (Blocktype *) bbb;
  if (b->free)
    {
      b->tempel = b->free;
      b->free = ((struct block_internal *) (b->free))->next;
    }
  else
    b->tempel = (void *) xmalloc (b->elsize);
}

void
Blocktype_free (void *bbb, void *el)
{
  Blocktype *b = (Blocktype *) bbb;
  ((struct block_internal *) el)->next = b->free;
  b->free = el;
}