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Added comment on how to expand the use of the debug sync framework for scheduler

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Mikael Ronstrom 2011-03-04 12:44:49 +01:00
commit a193425d1e
1 changed files with 4 additions and 0 deletions
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4
sql/debug_sync.cc
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@ -1745,6 +1745,10 @@ static void debug_sync_execute(THD *thd, st_debug_sync_action *action)
We don't use enter_cond()/exit_cond(). They do not save old
mutex and cond. This would prohibit the use of DEBUG_SYNC
between other places of enter_cond() and exit_cond().
We need to check for existence of thd->mysys_var to also make
it possible to use DEBUG_SYNC framework in scheduler when this
variable has been set to NULL.
*/
if (thd->mysys_var)
{