DBUG_ASSERT_LOCK

include/my_sys.h:
  added DBUG_ASSERT_LOCK()
sql/slave.cc:
  use DBUG_ASSERT_LOCK()

include/my_sys.h

@@ -725,6 +725,12 @@ byte *my_compress_alloc(const byte *packet, ulong *len, ulong *complen);
 ulong checksum(const byte *mem, uint count);
 uint my_bit_log2(ulong value);
 
+#if defined(SAFE_MUTEX) && !defined(DBUG_OFF)
+#define DBUG_ASSERT_LOCK(lock) DBUG_ASSERT((lock)->count == 1 && \
+				   (lock)->thread == pthread_self())
+#else
+#define DBUG_ASSERT_LOCK(lock)
+#endif
 
 #if defined(_MSC_VER) && !defined(__WIN__)
 extern void sleep(int sec);

sql/slave.cc

@@ -361,7 +361,7 @@ int terminate_slave_thread(THD* thd, pthread_mutex_t* term_lock,
     abstime.tv_sec=tv.tv_sec+2;
     abstime.tv_nsec=tv.tv_usec*1000;
 #endif
-    DBUG_ASSERT(cond_lock->count > 0 && cond_lock->thread == pthread_self());
+    DBUG_ASSERT_LOCK(cond_lock);
     pthread_cond_timedwait(term_cond, cond_lock, &abstime);
     if (*slave_running)
       KICK_SLAVE(thd);