fs/reiser4/pool.h

   1 /* Copyright 2001, 2002, 2003 by Hans Reiser, licensing governed by
   2  * reiser4/README */
   3
   4 /* Fast pool allocation */
   5
   6 #ifndef __REISER4_POOL_H__
   7 #define __REISER4_POOL_H__
   8
   9 #include <linux/types.h>
  10
  11 struct reiser4_pool {
  12         size_t obj_size;
  13         int objs;
  14         char *data;
  15         struct list_head free;
  16         struct list_head used;
  17         struct list_head extra;
  18 };
  19
  20 struct reiser4_pool_header {
  21         /* object is either on free or "used" lists */
  22         struct list_head usage_linkage;
  23         struct list_head level_linkage;
  24         struct list_head extra_linkage;
  25 };
  26
  27 typedef enum {
  28         POOLO_BEFORE,
  29         POOLO_AFTER,
  30         POOLO_LAST,
  31         POOLO_FIRST
  32 } pool_ordering;
  33
  34 /* pool manipulation functions */
  35
  36 extern void reiser4_init_pool(struct reiser4_pool *pool, size_t obj_size,
  37                               int num_of_objs, char *data);
  38 extern void reiser4_done_pool(struct reiser4_pool *pool);
  39 extern void reiser4_pool_free(struct reiser4_pool *pool,
  40                               struct reiser4_pool_header *h);
  41 struct reiser4_pool_header *reiser4_add_obj(struct reiser4_pool *pool,
  42                                          struct list_head *list,
  43                                          pool_ordering order,
  44                                          struct reiser4_pool_header *reference);
  45
  46 /* __REISER4_POOL_H__ */
  47 #endif
  48
  49 /* Make Linus happy.
  50    Local variables:
  51    c-indentation-style: "K&R"
  52    mode-name: "LC"
  53    c-basic-offset: 8
  54    tab-width: 8
  55    fill-column: 120
  56    End:
  57 */