lib/ntdb/test/api-94-expand-during-parse.c

   1 /* We use direct access to hand to the parse function: what if db expands? */
   2 #include "config.h"
   3 #include "ntdb.h"
   4 #include "tap-interface.h"
   5 #include "logging.h"
   6 #include "../private.h" /* To establish size, esp. for NTDB_INTERNAL dbs */
   7
   8 static struct ntdb_context *ntdb;
   9
  10 static off_t ntdb_size(void)
  11 {
  12         return ntdb->file->map_size;
  13 }
  14
  15 struct parse_info {
  16         unsigned int depth;
  17         NTDB_DATA expected;
  18 };
  19
  20 static enum NTDB_ERROR parse(NTDB_DATA key, NTDB_DATA data,
  21                              struct parse_info *pinfo)
  22 {
  23         off_t flen;
  24         unsigned int i;
  25
  26         if (!ntdb_deq(data, pinfo->expected))
  27                 return NTDB_ERR_EINVAL;
  28
  29         flen = ntdb_size();
  30
  31         for (i = 0; ntdb_size() == flen; i++) {
  32                 NTDB_DATA add = ntdb_mkdata(&i, sizeof(i));
  33
  34                 /* This is technically illegal parse(), which is why we
  35                  * grabbed allrecord lock.*/
  36                 ntdb_store(ntdb, add, add, NTDB_INSERT);
  37         }
  38
  39         /* Access the record again. */
  40         if (!ntdb_deq(data, pinfo->expected))
  41                 return NTDB_ERR_EINVAL;
  42
  43         /* Recurse!  Woot! */
  44         if (pinfo->depth != 0) {
  45                 enum NTDB_ERROR ecode;
  46
  47                 pinfo->depth--;
  48                 ecode = ntdb_parse_record(ntdb, key, parse, pinfo);
  49                 if (ecode) {
  50                         return ecode;
  51                 }
  52         }
  53
  54         /* Access the record one more time. */
  55         if (!ntdb_deq(data, pinfo->expected))
  56                 return NTDB_ERR_EINVAL;
  57
  58         return NTDB_SUCCESS;
  59 }
  60
  61 int main(int argc, char *argv[])
  62 {
  63         unsigned int i;
  64         int flags[] = { NTDB_INTERNAL, NTDB_DEFAULT, NTDB_NOMMAP,
  65                         NTDB_INTERNAL|NTDB_CONVERT, NTDB_CONVERT,
  66                         NTDB_NOMMAP|NTDB_CONVERT };
  67         struct parse_info pinfo;
  68         NTDB_DATA key = ntdb_mkdata("hello", 5), data = ntdb_mkdata("world", 5);
  69
  70         plan_tests(sizeof(flags) / sizeof(flags[0]) * 3 + 1);
  71         for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
  72                 ntdb = ntdb_open("api-94-expand-during-parse.ntdb",
  73                                  flags[i]|MAYBE_NOSYNC,
  74                                  O_RDWR|O_CREAT|O_TRUNC, 0600, &tap_log_attr);
  75                 ok1(ntdb_store(ntdb, key, data, NTDB_INSERT) == NTDB_SUCCESS);
  76                 ok1(ntdb_lockall(ntdb) == NTDB_SUCCESS);
  77                 pinfo.expected = data;
  78                 pinfo.depth = 3;
  79                 ok1(ntdb_parse_record(ntdb, key, parse, &pinfo) == NTDB_SUCCESS);
  80                 ntdb_unlockall(ntdb);
  81                 ntdb_close(ntdb);
  82         }
  83
  84         ok1(tap_log_messages == 0);
  85         return exit_status();
  86 }