locking issues,

test for LONGLONG_MIN in decimal.c


myisam/mi_create.c:
  lock THR_LOCK_myisam later
mysys/thr_alarm.c:
  remove misplaced comment and "safety" if()
server-tools/instance-manager/instance.cc:
  add unlock
strings/decimal.c:
  correct the test for LONGLONG_MIN. fix debug sprintf

myisam/mi_create.c

@@ -72,7 +72,6 @@ int mi_create(const char *name,uint keys,MI_KEYDEF *keydefs,
   }
   LINT_INIT(dfile);
   LINT_INIT(file);
-  pthread_mutex_lock(&THR_LOCK_myisam);
   errpos=0;
   options=0;
   bzero((byte*) &share,sizeof(share));
@@ -135,7 +134,7 @@ int mi_create(const char *name,uint keys,MI_KEYDEF *keydefs,
 	pack_reclength++;
         min_pack_length++;
         /* We must test for 257 as length includes pack-length */
- 	if (test(rec->length >= 257))
+        if (test(rec->length >= 257))
 	{
 	  long_varchar_count++;
 	  pack_reclength+= 2;			/* May be packed on 3 bytes */
@@ -542,6 +541,8 @@ int mi_create(const char *name,uint keys,MI_KEYDEF *keydefs,
   if (! (flags & HA_DONT_TOUCH_DATA))
     share.state.create_time= (long) time((time_t*) 0);
 
+  pthread_mutex_lock(&THR_LOCK_myisam);
+
   if (ci->index_file_name)
   {
     fn_format(filename, ci->index_file_name,"",MI_NAME_IEXT,4);

mysys/thr_alarm.c

@@ -401,7 +401,7 @@ void end_thr_alarm(my_bool free_structures)
 {
   DBUG_ENTER("end_thr_alarm");
   if (alarm_aborted != 1)			/* If memory not freed */
-  {    
+  {
     pthread_mutex_lock(&LOCK_alarm);
     DBUG_PRINT("info",("Resheduling %d waiting alarms",alarm_queue.elements));
     alarm_aborted= -1;				/* mark aborted */
@@ -415,13 +415,10 @@ void end_thr_alarm(my_bool free_structures)
     if (free_structures)
     {
       struct timespec abstime;
-      /*
-	The following test is just for safety, the caller should not
-	depend on this
-      */
+
       DBUG_ASSERT(!alarm_queue.elements);
-      /* Wait until alarm thread dies */
 
+      /* Wait until alarm thread dies */
       set_timespec(abstime, 10);		/* Wait up to 10 seconds */
       while (alarm_thread_running)
       {
@@ -429,16 +426,13 @@ void end_thr_alarm(my_bool free_structures)
 	if (error == ETIME || error == ETIMEDOUT)
 	  break;				/* Don't wait forever */
       }
-      if (!alarm_queue.elements)
+      delete_queue(&alarm_queue);
+      alarm_aborted= 1;
+      pthread_mutex_unlock(&LOCK_alarm);
+      if (!alarm_thread_running)              /* Safety */
       {
-	delete_queue(&alarm_queue);
-	alarm_aborted= 1;
-	pthread_mutex_unlock(&LOCK_alarm);
-	if (!alarm_thread_running)		/* Safety */
-	{
-	  pthread_mutex_destroy(&LOCK_alarm);
-	  pthread_cond_destroy(&COND_alarm);
-	}
+        pthread_mutex_destroy(&LOCK_alarm);
+        pthread_cond_destroy(&COND_alarm);
       }
     }
     else

server-tools/instance-manager/instance.cc

@@ -255,7 +255,10 @@ static void start_and_monitor_instance(Instance_options *old_instance_options,
   log_info("starting instance %s", instance_name_buff);
 
   if (start_process(old_instance_options, &process_info))
+  {
+    instance_map->unlock();
     return;                                     /* error is logged */
+  }
 
   /* allow users to delete instances */
   instance_map->unlock();

strings/decimal.c

@@ -1069,9 +1069,9 @@ int decimal2longlong(decimal_t *from, longlong *to)
     }
   }
   /* boundary case: 9223372036854775808 */
-  if (unlikely(from->sign==0 && x < 0 && -x < 0))
+  if (unlikely(from->sign==0 && x == LONGLONG_MIN))
   {
-    *to= -1-x;
+    *to= LONGLONG_MAX;
     return E_DEC_OVERFLOW;
   }
 
@@ -2675,7 +2675,8 @@ void test_pr(const char *s1, int prec, int dec, char filler, const char *orig,
   int slen= sizeof(s2);
   int res;
 
-  sprintf(s, "'%s', %d, %d, '%c'", s1, prec, dec, filler);
+  sprintf(s, filler ? "'%s', %d, %d, '%c'" : "'%s', %d, %d, '\\0'",
+          s1, prec, dec, filler);
   end= strend(s1);
   string2decimal(s1, &a, &end);
   res= decimal2string(&a, s2, &slen, prec, dec, filler);