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Fix SysV semaphores - repair mti_txnid.

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Similar to 443a7e40c4.
This commit is contained in:
Hallvard Furuseth 2014-12-05 18:18:53 +01:00
parent 3e6ac6ef6b
commit 1413de3a04
1 changed files with 9 additions and 1 deletions
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10
libraries/liblmdb/mdb.c
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@ -2573,9 +2573,17 @@ mdb_txn_renew0(MDB_txn *txn)
if (ti) {
if (LOCK_MUTEX(rc, env, MDB_MUTEX(env, w)))
return rc;
#ifdef MDB_USE_SYSV_SEM
meta = env->me_metas[ mdb_env_pick_meta(env) ];
txn->mt_txnid = meta->mm_txnid;
/* Update mti_txnid like mdb_mutex_failed() would,
* in case last writer crashed before updating it.
*/
ti->mti_txnid = txn->mt_txnid;
#else
txn->mt_txnid = ti->mti_txnid;
meta = env->me_metas[txn->mt_txnid & 1];
#endif
} else {
meta = env->me_metas[ mdb_env_pick_meta(env) ];
txn->mt_txnid = meta->mm_txnid;