InnoDB: Fix compiler warnings and some bad formatting introduced

in ChangeSet@1.1721.48.1


innobase/include/ut0ut.h:
  Add prototype for ut_usectime()
innobase/srv/srv0srv.c:
  Fix some misformatted code.
  Remove a compiler warning about possibly uninitialized variable
  in srv_suspend_mysql_thread().
innobase/sync/sync0sync.c:
  Remove a compiler warning about possibly uninitialized variable
  in mutex_spin_wait().
innobase/ut/ut0ut.c:
  Improve the documentation and formatting of ut_usectime().

innobase/include/ut0ut.h

@@ -139,6 +139,14 @@ ib_time_t
 ut_time(void);
 /*=========*/
 /**************************************************************
+Returns system time. */
+
+void
+ut_usectime(
+/*========*/
+	ulint*	sec,	/* out: seconds since the Epoch */
+	ulint*	ms);	/* out: microseconds since the Epoch+*sec */
+/**************************************************************
 Returns the difference of two times in seconds. */
 
 double

innobase/srv/srv0srv.c

@@ -346,10 +346,10 @@ static ulint	srv_n_rows_updated_old		= 0;
 static ulint	srv_n_rows_deleted_old		= 0;
 static ulint	srv_n_rows_read_old		= 0;
 
-ulint srv_n_lock_wait_count=          0;
-ulint srv_n_lock_wait_current_count=  0;
-ib_longlong srv_n_lock_wait_time=       0;
-ulint srv_n_lock_max_wait_time=   0;
+ulint		srv_n_lock_wait_count		= 0;
+ulint		srv_n_lock_wait_current_count	= 0;
+ib_longlong	srv_n_lock_wait_time		= 0;
+ulint		srv_n_lock_max_wait_time	= 0;
 
 
 /*
@@ -1384,10 +1384,11 @@ srv_suspend_mysql_thread(
 	trx_t*		trx;
 	ibool		had_dict_lock			= FALSE;
 	ibool		was_declared_inside_innodb	= FALSE;
-  ib_longlong   start_time, finish_time;
-  ulint   diff_time;
-  ulint   sec;
-  ulint   ms;
+	ib_longlong	start_time			= 0;
+	ib_longlong	finish_time;
+	ulint		diff_time;
+	ulint		sec;
+	ulint		ms;
 
 #ifdef UNIV_SYNC_DEBUG
 	ut_ad(!mutex_own(&kernel_mutex));
@@ -1430,15 +1431,14 @@ srv_suspend_mysql_thread(
 	os_event_reset(event);	
 
 	slot->suspend_time = ut_time();
-  if (thr->lock_state == QUE_THR_LOCK_ROW)
-  {
-    srv_n_lock_wait_count++;
-    srv_n_lock_wait_current_count++;
 
-    ut_usectime(&sec, &ms);
-    start_time= (ib_longlong)sec * 1000000 + ms;
+	if (thr->lock_state == QUE_THR_LOCK_ROW) {
+		srv_n_lock_wait_count++;
+		srv_n_lock_wait_current_count++;
 
-  }
+		ut_usectime(&sec, &ms);
+		start_time = (ib_longlong)sec * 1000000 + ms;
+	}
 	/* Wake the lock timeout monitor thread, if it is suspended */
 
 	os_event_set(srv_lock_timeout_thread_event);
@@ -1490,20 +1490,18 @@ srv_suspend_mysql_thread(
 
 	wait_time = ut_difftime(ut_time(), slot->suspend_time);
 
-  if (thr->lock_state == QUE_THR_LOCK_ROW)
-  {
-      ut_usectime(&sec, &ms);
-      finish_time= (ib_longlong)sec * 1000000 + ms;
-  
-      diff_time= finish_time-start_time;
+	if (thr->lock_state == QUE_THR_LOCK_ROW) {
+		ut_usectime(&sec, &ms);
+		finish_time = (ib_longlong)sec * 1000000 + ms;
+
+		diff_time = finish_time - start_time;
   
-      srv_n_lock_wait_current_count--;
-      srv_n_lock_wait_time= srv_n_lock_wait_time + diff_time;
-      if (diff_time > srv_n_lock_max_wait_time)
-      {
-        srv_n_lock_max_wait_time= diff_time;
-      }
-  }
+		srv_n_lock_wait_current_count--;
+		srv_n_lock_wait_time = srv_n_lock_wait_time + diff_time;
+		if (diff_time > srv_n_lock_max_wait_time) {
+			srv_n_lock_max_wait_time = diff_time;
+		}
+	}
 
 	if (trx->was_chosen_as_deadlock_victim) {
 

innobase/sync/sync0sync.c

@@ -368,7 +368,7 @@ mutex_spin_wait(
 {
   ulint    index; /* index of the reserved wait cell */
   ulint    i;     /* spin round count */
-  ib_longlong lstart_time, lfinish_time; /* for timing os_wait */
+  ib_longlong lstart_time = 0, lfinish_time; /* for timing os_wait */
   ulint ltime_diff;
   ulint sec;
   ulint ms;

innobase/ut/ut0ut.c

@@ -74,18 +74,18 @@ ut_time(void)
 }
 
 /**************************************************************
-Returns system time. We do not specify the format of the time returned:
-the only way to manipulate it is to use the function ut_difftime. */
+Returns system time. */
 
 void
-ut_usectime(ulint* sec, ulint* ms)
-/*=========*/
+ut_usectime(
+/*========*/
+	ulint*	sec,	/* out: seconds since the Epoch */
+	ulint*	ms)	/* out: microseconds since the Epoch+*sec */
 {
-  struct timeval tv;
-  gettimeofday(&tv,NULL);
-  *sec = (ulint) tv.tv_sec;
-  *ms  = (ulint) tv.tv_usec;
-  return;
+	struct timeval	tv;
+	gettimeofday(&tv,NULL);
+	*sec = (ulint) tv.tv_sec;
+	*ms  = (ulint) tv.tv_usec;
 }
 
 /**************************************************************