mdb_page_unspill(): Rename local vars.

The names have caused bugs, "txn" was treated as
the current transaction.

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 21d11b9..f5db761 100644 (file)
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -1789,24 +1789,24 @@ mdb_page_copy(MDB_page *dst, MDB_page *src, unsigned int psize)
 /** Pull a page off the txn's spill list, if present.
  * If a page being referenced was spilled to disk in this txn, bring
  * it back and make it dirty/writable again.
- * @param[in] tx0 the transaction handle.
+ * @param[in] txn the transaction handle.
  * @param[in] mp the page being referenced.
  * @param[out] ret the writable page, if any. ret is unchanged if
  * mp wasn't spilled.
  */
 static int
-mdb_page_unspill(MDB_txn *tx0, MDB_page *mp, MDB_page **ret)
+mdb_page_unspill(MDB_txn *txn, MDB_page *mp, MDB_page **ret)
 {
-       MDB_env *env = tx0->mt_env;
-       MDB_txn *txn;
+       MDB_env *env = txn->mt_env;
+       const MDB_txn *tx2;
        unsigned x;
        pgno_t pgno = mp->mp_pgno, pn = pgno << 1;
 
-       for (txn = tx0; txn; txn=txn->mt_parent) {
-               if (!txn->mt_spill_pgs)
+       for (tx2 = txn; tx2; tx2=tx2->mt_parent) {
+               if (!tx2->mt_spill_pgs)
                        continue;
-               x = mdb_midl_search(txn->mt_spill_pgs, pn);
-               if (x <= txn->mt_spill_pgs[0] && txn->mt_spill_pgs[x] == pn) {
+               x = mdb_midl_search(tx2->mt_spill_pgs, pn);
+               if (x <= tx2->mt_spill_pgs[0] && tx2->mt_spill_pgs[x] == pn) {
                        MDB_page *np;
                        int num;
                        if (txn->mt_dirty_room == 0)
@@ -1818,7 +1818,7 @@ mdb_page_unspill(MDB_txn *tx0, MDB_page *mp, MDB_page **ret)
                        if (env->me_flags & MDB_WRITEMAP) {
                                np = mp;
                        } else {
-                               np = mdb_page_malloc(tx0, num);
+                               np = mdb_page_malloc(txn, num);
                                if (!np)
                                        return ENOMEM;
                                if (num > 1)
@@ -1826,7 +1826,7 @@ mdb_page_unspill(MDB_txn *tx0, MDB_page *mp, MDB_page **ret)
                                else
                                        mdb_page_copy(np, mp, env->me_psize);
                        }
-                       if (txn == tx0) {
+                       if (tx2 == txn) {
                                /* If in current txn, this page is no longer spilled.
                                 * If it happens to be the last page, truncate the spill list.
                                 * Otherwise mark it as deleted by setting the LSB.
@@ -1839,7 +1839,7 @@ mdb_page_unspill(MDB_txn *tx0, MDB_page *mp, MDB_page **ret)
                                 * page remains spilled until child commits
                                 */
 
-                       mdb_page_dirty(tx0, np);
+                       mdb_page_dirty(txn, np);
                        np->mp_flags |= P_DIRTY;
                        *ret = np;
                        break;