servers/ds/store.h

   1 /* Type definitions for the Data Store Server. */
   2
   3 #include <sys/types.h>
   4 #include <minix/sys_config.h>
   5 #include <minix/ds.h>
   6 #include <minix/bitmap.h>
   7 #include <regex.h>
   8
   9 /* Constants for the Data Store Server. */
  10 #define NR_DS_KEYS               64     /* reserve space for so many items */
  11 #define NR_DS_SUBS   (4*_NR_SYS_PROCS)  /* .. and so many subscriptions */
  12
  13 /* Types. */
  14
  15 struct data_store {
  16   int ds_flags;                 /* flags for this store, includes type info */
  17   char ds_key[DS_MAX_KEYLEN];   /* key to lookup information */
  18   union {
  19     u32_t ds_val_u32;                   /* u32 data (DS_TYPE_U32) */
  20     char  ds_val_str[DS_MAX_VALLEN];    /* string data (DS_TYPE_STR) */
  21   } ds_val;
  22
  23   /* out of date subscribers. */
  24   bitchunk_t ds_old_subs[BITMAP_CHUNKS(NR_DS_SUBS)];
  25 };
  26
  27 struct subscription {
  28   int sub_flags;                /* flags for this subscription */
  29   regex_t sub_regex;            /* regular expression agains keys */
  30   endpoint_t sub_owner;         /* who is subscribed */
  31 };
  32
  33