servers/ds/store.h

   1 #ifndef _DS_STORE_H_
   2 #define _DS_STORE_H_
   3
   4 /* Type definitions for the Data Store Server. */
   5 #include <sys/types.h>
   6 #include <minix/sys_config.h>
   7 #include <minix/ds.h>
   8 #include <minix/bitmap.h>
   9 #include <regex.h>
  10
  11 #define NR_DS_KEYS      64      /* number of entries */
  12 #define NR_DS_SUBS      (4*_NR_SYS_PROCS)       /* number of subscriptions */
  13 #define NR_DS_SNAPSHOT  5       /* number of snapshots */
  14
  15 /* Base 'class' for the following 3 structs. */
  16 struct data_store {
  17         int     flags;
  18         char    key[DS_MAX_KEYLEN];     /* key to lookup information */
  19         char    owner[DS_MAX_KEYLEN];
  20
  21         union {
  22                 unsigned u32;
  23                 struct {
  24                         void *data;
  25                         size_t length;
  26                         size_t reallen;
  27                 } mem;
  28                 struct dsi_map {
  29                         void *data;
  30                         size_t length;
  31                         void *realpointer;
  32                         void *snapshots[NR_DS_SNAPSHOT];
  33                         int sindex;
  34                 } map;
  35         } u;
  36 };
  37
  38 struct subscription {
  39         int             flags;
  40         char            owner[DS_MAX_KEYLEN];
  41         regex_t         regex;
  42         bitchunk_t      old_subs[BITMAP_CHUNKS(NR_DS_KEYS)];
  43 };
  44
  45 #endif /* _DS_STORE_H_ */