repair/slab.h

   1 /*
   2  * Copyright (C) 2016 Oracle.  All Rights Reserved.
   3  *
   4  * Author: Darrick J. Wong <darrick.wong@oracle.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it would be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write the Free Software Foundation,
  18  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.
  19  */
  20 #ifndef SLAB_H_
  21 #define SLAB_H_
  22
  23 struct xfs_slab;
  24 struct xfs_slab_cursor;
  25
  26 extern int init_slab(struct xfs_slab **, size_t);
  27 extern void free_slab(struct xfs_slab **);
  28
  29 extern int slab_add(struct xfs_slab *, void *);
  30 extern void qsort_slab(struct xfs_slab *, int (*)(const void *, const void *));
  31 extern size_t slab_count(struct xfs_slab *);
  32
  33 extern int init_slab_cursor(struct xfs_slab *,
  34         int (*)(const void *, const void *), struct xfs_slab_cursor **);
  35 extern void free_slab_cursor(struct xfs_slab_cursor **);
  36
  37 extern void *peek_slab_cursor(struct xfs_slab_cursor *);
  38 extern void advance_slab_cursor(struct xfs_slab_cursor *);
  39 extern void *pop_slab_cursor(struct xfs_slab_cursor *);
  40
  41 struct xfs_bag;
  42
  43 extern int init_bag(struct xfs_bag **);
  44 extern void free_bag(struct xfs_bag **);
  45 extern int bag_add(struct xfs_bag *, void *);
  46 extern int bag_remove(struct xfs_bag *, size_t);
  47 extern size_t bag_count(struct xfs_bag *);
  48 extern void *bag_item(struct xfs_bag *, size_t);
  49
  50 #define foreach_bag_ptr(bag, idx, ptr) \
  51         for ((idx) = 0, (ptr) = bag_item((bag), (idx)); \
  52              (idx) < bag_count(bag); \
  53              (idx)++, (ptr) = bag_item((bag), (idx)))
  54
  55 #define foreach_bag_ptr_reverse(bag, idx, ptr) \
  56         for ((idx) = bag_count(bag) - 1, (ptr) = bag_item((bag), (idx)); \
  57              (ptr) != NULL; \
  58              (idx)--, (ptr) = bag_item((bag), (idx)))
  59
  60 #endif /* SLAB_H_ */