Add error code MDB_MAP_RESIZED.

diff --git a/libraries/liblmdb/lmdb.h b/libraries/liblmdb/lmdb.h
index 7719e32..aaaa292 100644 (file)
--- a/libraries/liblmdb/lmdb.h
+++ b/libraries/liblmdb/lmdb.h
@@ -353,7 +353,9 @@ typedef enum MDB_cursor_op {
 #define MDB_CURSOR_FULL        (-30787)
        /** Page has not enough space - internal error */
 #define MDB_PAGE_FULL  (-30786)
-#define MDB_LAST_ERRCODE       MDB_PAGE_FULL
+       /** Database contents grew beyond environment mapsize */
+#define MDB_MAP_RESIZED        (-30785)
+#define MDB_LAST_ERRCODE       MDB_MAP_RESIZED
 /** @} */
 
 /** @brief Statistics for a database in the environment */
@@ -675,7 +677,9 @@ int  mdb_env_set_maxdbs(MDB_env *env, MDB_dbi dbs);
         * errors are:
         * <ul>
         *      <li>#MDB_PANIC - a fatal error occurred earlier and the environment
-        *              must be shut down.
+-       *              must be shut down.
+        *      <li>#MDB_MAP_RESIZED - another process wrote data beyond this MDB_env's
+        *              mapsize and the environment must be shut down.
         *      <li>ENOMEM - out of memory, or a read-only transaction was requested and
         *              the reader lock table is full. See #mdb_env_set_maxreaders().
         * </ul>

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 7bfdfc2..40b9bda 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -1054,7 +1054,8 @@ static char *const mdb_errstr[] = {
        "MDB_TLS_FULL: Thread-local storage keys full - too many environments open",
        "MDB_TXN_FULL: Transaction has too many dirty pages - transaction too big",
        "MDB_CURSOR_FULL: Internal error - cursor stack limit reached",
-       "MDB_PAGE_FULL: Internal error - page has no more space"
+       "MDB_PAGE_FULL: Internal error - page has no more space",
+       "MDB_MAP_RESIZED: Database contents grew beyond environment mapsize",
 };
 
 char *
@@ -1818,6 +1819,11 @@ mdb_txn_renew0(MDB_txn *txn)
        if (txn->mt_numdbs > 2)
                memset(txn->mt_dbflags+2, DB_STALE, txn->mt_numdbs-2);
 
+       if (env->me_maxpg < txn->mt_next_pgno) {
+               mdb_txn_reset0(txn);
+               return MDB_MAP_RESIZED;
+       }
+
        return MDB_SUCCESS;
 }