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