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Defines | Functions | Variables
mtest6.c File Reference
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "mdb.h"

Go to the source code of this file.

Defines

#define _XOPEN_SOURCE   500 /* srandom(), random() */

Functions

int main (int argc, char *argv[])

Variables

char dkbuf [1024]

Define Documentation

#define _XOPEN_SOURCE   500 /* srandom(), random() */

Definition at line 16 of file mtest6.c.


Function Documentation

int main ( int  argc,
char *  argv[] 
)

Definition at line 25 of file mtest6.c.

{
       int i = 0, j = 0, rc;
       MDB_env *env;
       MDB_dbi dbi;
       MDB_val key, data;
       MDB_txn *txn;
       MDB_stat mst;
       MDB_cursor *cursor;
       int count;
       int *values;
       long kval;
       char *sval;

       srandom(time(NULL));

       rc = mdb_env_create(&env);
       rc = mdb_env_set_mapsize(env, 10485760);
       rc = mdb_env_set_maxdbs(env, 4);
       rc = mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664);
       rc = mdb_txn_begin(env, NULL, 0, &txn);
       rc = mdb_open(txn, "id2", MDB_CREATE|MDB_INTEGERKEY, &dbi);
       rc = mdb_cursor_open(txn, dbi, &cursor);
       rc = mdb_stat(txn, dbi, &mst);

       sval = calloc(1, mst.ms_psize / 4);
       key.mv_size = sizeof(long);
       key.mv_data = &kval;
       data.mv_size = mst.ms_psize / 4 - 30;
       data.mv_data = sval;

       printf("Adding 12 values, should yield 3 splits\n");
       for (i=0;i<12;i++) {
              kval = i*5;
              sprintf(sval, "%08x", kval);
              rc = mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE);
       }
       printf("Adding 12 more values, should yield 3 splits\n");
       for (i=0;i<12;i++) {
              kval = i*5+4;
              sprintf(sval, "%08x", kval);
              rc = mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE);
       }
       printf("Adding 12 more values, should yield 3 splits\n");
       for (i=0;i<12;i++) {
              kval = i*5+1;
              sprintf(sval, "%08x", kval);
              rc = mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE);
       }
       rc = mdb_cursor_get(cursor, &key, &data, MDB_FIRST);

       do {
              printf("key: %p %s, data: %p %.*s\n",
                     key.mv_data,  mdb_dkey(&key, dkbuf),
                     data.mv_data, (int) data.mv_size, (char *) data.mv_data);
       } while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0);
       mdb_cursor_close(cursor);
       mdb_txn_commit(txn);

#if 0
       j=0;

       for (i= count - 1; i > -1; i-= (random()%5)) {
              j++;
              txn=NULL;
              rc = mdb_txn_begin(env, NULL, 0, &txn);
              sprintf(kval, "%03x", values[i & ~0x0f]);
              sprintf(sval, "%03x %d foo bar", values[i], values[i]);
              key.mv_size = sizeof(int);
              key.mv_data = kval;
              data.mv_size = sizeof(sval);
              data.mv_data = sval;
              rc = mdb_del(txn, dbi, &key, &data);
              if (rc) {
                     j--;
                     mdb_txn_abort(txn);
              } else {
                     rc = mdb_txn_commit(txn);
              }
       }
       free(values);
       printf("Deleted %d values\n", j);

       rc = mdb_env_stat(env, &mst);
       rc = mdb_txn_begin(env, NULL, 1, &txn);
       rc = mdb_cursor_open(txn, dbi, &cursor);
       printf("Cursor next\n");
       while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
              printf("key: %.*s, data: %.*s\n",
                     (int) key.mv_size,  (char *) key.mv_data,
                     (int) data.mv_size, (char *) data.mv_data);
       }
       printf("Cursor prev\n");
       while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
              printf("key: %.*s, data: %.*s\n",
                     (int) key.mv_size,  (char *) key.mv_data,
                     (int) data.mv_size, (char *) data.mv_data);
       }
       mdb_cursor_close(cursor);
       mdb_close(txn, dbi);

       mdb_txn_abort(txn);
#endif
       mdb_env_close(env);

       return 0;
}

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Variable Documentation

char dkbuf[1024]

Definition at line 23 of file mtest6.c.