nostrdb

mtest.c (5552B)

---

 /* mtest.c - memory-mapped database tester/toy */
 /*
  * Copyright 2011-2021 Howard Chu, Symas Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted only as authorized by the OpenLDAP
  * Public License.
  *
  * A copy of this license is available in the file LICENSE in the
  * top-level directory of the distribution or, alternatively, at
  * <http://www.OpenLDAP.org/license.html>.
  */
 #include <stdio.h>
 #include <stdlib.h>
 #include <time.h>
 #include "lmdb.h"
 
 #define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
 #define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
 #define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
 	"%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
 
 int main(int argc,char * argv[])
 {
 	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, *cur2;
 	MDB_cursor_op op;
 	int count;
 	int *values;
 	char sval[32] = "";
 
 	srand(time(NULL));
 
 	    count = (rand()%384) + 64;
 	    values = (int *)malloc(count*sizeof(int));
 
 	    for(i = 0;i<count;i++) {
 			values[i] = rand()%1024;
 	    }
     
 		E(mdb_env_create(&env));
 		E(mdb_env_set_maxreaders(env, 1));
 		E(mdb_env_set_mapsize(env, 10485760));
 		E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP /*|MDB_NOSYNC*/, 0664));
 
 		E(mdb_txn_begin(env, NULL, 0, &txn));
 		E(mdb_dbi_open(txn, NULL, 0, &dbi));
    
 		key.mv_size = sizeof(int);
 		key.mv_data = sval;
 
 		printf("Adding %d values\n", count);
 	    for (i=0;i<count;i++) {	
 			sprintf(sval, "%03x %d foo bar", values[i], values[i]);
 			/* Set <data> in each iteration, since MDB_NOOVERWRITE may modify it */
 			data.mv_size = sizeof(sval);
 			data.mv_data = sval;
 			if (RES(MDB_KEYEXIST, mdb_put(txn, dbi, &key, &data, MDB_NOOVERWRITE))) {
 				j++;
 				data.mv_size = sizeof(sval);
 				data.mv_data = sval;
 			}
 	    }
 		if (j) printf("%d duplicates skipped\n", j);
 		E(mdb_txn_commit(txn));
 		E(mdb_env_stat(env, &mst));
 
 		E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
 		E(mdb_cursor_open(txn, dbi, &cursor));
 		while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
 			printf("key: %p %.*s, data: %p %.*s\n",
 				key.mv_data,  (int) key.mv_size,  (char *) key.mv_data,
 				data.mv_data, (int) data.mv_size, (char *) data.mv_data);
 		}
 		CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
 		mdb_cursor_close(cursor);
 		mdb_txn_abort(txn);
 
 		j=0;
 		key.mv_data = sval;
 	    for (i= count - 1; i > -1; i-= (rand()%5)) {
 			j++;
 			txn=NULL;
 			E(mdb_txn_begin(env, NULL, 0, &txn));
 			sprintf(sval, "%03x ", values[i]);
 			if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, NULL))) {
 				j--;
 				mdb_txn_abort(txn);
 			} else {
 				E(mdb_txn_commit(txn));
 			}
 	    }
 	    free(values);
 		printf("Deleted %d values\n", j);
 
 		E(mdb_env_stat(env, &mst));
 		E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
 		E(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);
 		}
 		CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
 		printf("Cursor last\n");
 		E(mdb_cursor_get(cursor, &key, &data, MDB_LAST));
 		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);
 		}
 		CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
 		printf("Cursor last/prev\n");
 		E(mdb_cursor_get(cursor, &key, &data, MDB_LAST));
 			printf("key: %.*s, data: %.*s\n",
 				(int) key.mv_size,  (char *) key.mv_data,
 				(int) data.mv_size, (char *) data.mv_data);
 		E(mdb_cursor_get(cursor, &key, &data, MDB_PREV));
 			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_txn_abort(txn);
 
 		printf("Deleting with cursor\n");
 		E(mdb_txn_begin(env, NULL, 0, &txn));
 		E(mdb_cursor_open(txn, dbi, &cur2));
 		for (i=0; i<50; i++) {
 			if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, MDB_NEXT)))
 				break;
 			printf("key: %p %.*s, data: %p %.*s\n",
 				key.mv_data,  (int) key.mv_size,  (char *) key.mv_data,
 				data.mv_data, (int) data.mv_size, (char *) data.mv_data);
 			E(mdb_del(txn, dbi, &key, NULL));
 		}
 
 		printf("Restarting cursor in txn\n");
 		for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) {
 			if (RES(MDB_NOTFOUND, mdb_cursor_get(cur2, &key, &data, op)))
 				break;
 			printf("key: %p %.*s, data: %p %.*s\n",
 				key.mv_data,  (int) key.mv_size,  (char *) key.mv_data,
 				data.mv_data, (int) data.mv_size, (char *) data.mv_data);
 		}
 		mdb_cursor_close(cur2);
 		E(mdb_txn_commit(txn));
 
 		printf("Restarting cursor outside txn\n");
 		E(mdb_txn_begin(env, NULL, 0, &txn));
 		E(mdb_cursor_open(txn, dbi, &cursor));
 		for (op=MDB_FIRST, i=0; i<=32; op=MDB_NEXT, i++) {
 			if (RES(MDB_NOTFOUND, mdb_cursor_get(cursor, &key, &data, op)))
 				break;
 			printf("key: %p %.*s, data: %p %.*s\n",
 				key.mv_data,  (int) key.mv_size,  (char *) key.mv_data,
 				data.mv_data, (int) data.mv_size, (char *) data.mv_data);
 		}
 		mdb_cursor_close(cursor);
 		mdb_txn_abort(txn);
 
 		mdb_dbi_close(env, dbi);
 		mdb_env_close(env);
 
 	return 0;
 }