ITS#7994 fix prev commit

Strip docs promising behaviors that we don't promise to hold.
Strip MDB_txnid_t typedef.

diff --git a/libraries/liblmdb/lmdb.h b/libraries/liblmdb/lmdb.h
index 803b286..621a8f6 100644 (file)
--- a/libraries/liblmdb/lmdb.h
+++ b/libraries/liblmdb/lmdb.h
@@ -226,9 +226,6 @@ typedef struct MDB_env MDB_env;
  */
 typedef struct MDB_txn MDB_txn;
 
-/** @brief Unique identifier for an active or recent transaction. */
-typedef size_t MDB_txnid_t;
-
 /** @brief A handle for an individual database in the DB environment. */
 typedef unsigned int   MDB_dbi;
 
@@ -451,7 +448,7 @@ typedef struct MDB_envinfo {
        void    *me_mapaddr;                    /**< Address of map, if fixed */
        size_t  me_mapsize;                             /**< Size of the data memory map */
        size_t  me_last_pgno;                   /**< ID of the last used page */
-       MDB_txnid_t  me_last_txnid;             /**< ID of the last committed transaction */
+       size_t  me_last_txnid;          /**< ID of the last committed transaction */
        unsigned int me_maxreaders;             /**< max reader slots in the environment */
        unsigned int me_numreaders;             /**< max reader slots used in the environment */
 } MDB_envinfo;
@@ -953,18 +950,16 @@ int  mdb_txn_begin(MDB_env *env, MDB_txn *parent, unsigned int flags, MDB_txn **
         */
 MDB_env *mdb_txn_env(MDB_txn *txn);
 
-       /** @brief Return the transaction's #MDB_txnid_t
+       /** @brief Return the transaction's ID.
         *
         * This returns the identifier associated with this transaction. For a
         * read-only transaction, this corresponds to the snapshot being read;
-        * concurrent readers will frequently have the same transaction ID. For
-        * a write transaction, this is always the snapshot read plus one. When
-        * a write transaction aborts, the next transaction ID will be reused.
+        * concurrent readers will frequently have the same transaction ID.
         *
         * @param[in] txn A transaction handle returned by #mdb_txn_begin()
         * @return A transaction ID, valid if input is an active transaction.
         */
-MDB_txnid_t mdb_txn_id(MDB_txn *txn);
+size_t mdb_txn_id(MDB_txn *txn);
 
        /** @brief Commit all the operations of a transaction into the database.
         *

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 87aa4f8..f61bbdf 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -2775,10 +2775,10 @@ mdb_txn_env(MDB_txn *txn)
        return txn->mt_env;
 }
 
-MDB_txnid_t
+size_t
 mdb_txn_id(MDB_txn *txn)
 {
-    if(!txn) return (txnid_t)-1;
+    if(!txn) return 0;
     return txn->mt_txnid;
 }