bk commit into 5.0 tree (lars:1.2117) BUG#18116

[Lars Thalmann]

Below is the list of changes that have just been committed into a local
5.0 repository of lthalmann. When lthalmann does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
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ChangeSet
  1.2117 06/03/31 11:48:08 lars@stripped +1 -0
  BUG#18116: Changed of how mutex is handled for XA and rotating binlog

  sql/log.cc
    1.188 06/03/31 11:47:59 lars@stripped +5 -1
    thread_safe_increment is done as an atomic operation on some platforms
    and that does not respect the lock

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	lars
# Host:	dl145h.mysql.com
# Root:	/users/lthalmann/bk/mysql-5.0-release-bug18116

--- 1.187/sql/log.cc	2006-02-18 17:19:10 +01:00
+++ 1.188/sql/log.cc	2006-03-31 11:47:59 +02:00
@@ -1882,7 +1882,11 @@
       rotate binlog, if necessary.
     */
     if (commit_event->get_type_code() == XID_EVENT)
-      thread_safe_increment(prepared_xids, &LOCK_prep_xids);
+    {
+      pthread_mutex_lock(&LOCK_prep_xids);
+      prepared_xids++;
+      pthread_mutex_unlock(&LOCK_prep_xids);
+    }
     else
       rotate_and_purge(RP_LOCK_LOG_IS_ALREADY_LOCKED);
   }