fs/reiser4/pool.h

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