gcc/alloc-pool.h

   1 /* Functions to support a pool of allocatable objects
   2    Copyright (C) 1997-2015 Free Software Foundation, Inc.
   3    Contributed by Daniel Berlin <dan@cgsoftware.com>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20 #ifndef ALLOC_POOL_H
  21 #define ALLOC_POOL_H
  22
  23 typedef unsigned long ALLOC_POOL_ID_TYPE;
  24
  25 typedef struct alloc_pool_list_def
  26 {
  27   struct alloc_pool_list_def *next;
  28 }
  29  *alloc_pool_list;
  30
  31 typedef struct alloc_pool_def
  32 {
  33   const char *name;
  34 #ifdef ENABLE_CHECKING
  35   ALLOC_POOL_ID_TYPE id;
  36 #endif
  37   size_t elts_per_block;
  38
  39   /* These are the elements that have been allocated at least once and freed.  */
  40   alloc_pool_list returned_free_list;
  41
  42   /* These are the elements that have not yet been allocated out of
  43      the last block obtained from XNEWVEC.  */
  44   char* virgin_free_list;
  45
  46   /* The number of elements in the virgin_free_list that can be
  47      allocated before needing another block.  */
  48   size_t virgin_elts_remaining;
  49
  50   size_t elts_allocated;
  51   size_t elts_free;
  52   size_t blocks_allocated;
  53   alloc_pool_list block_list;
  54   size_t block_size;
  55   size_t elt_size;
  56 }
  57  *alloc_pool;
  58
  59 extern alloc_pool create_alloc_pool (const char *, size_t, size_t);
  60 extern void free_alloc_pool (alloc_pool);
  61 extern void empty_alloc_pool (alloc_pool);
  62 extern void free_alloc_pool_if_empty (alloc_pool *);
  63 extern void *pool_alloc (alloc_pool) ATTRIBUTE_MALLOC;
  64 extern void pool_free (alloc_pool, void *);
  65 extern void dump_alloc_pool_statistics (void);
  66 #endif