monitor: Use object allocator lock

Use object allocator lock instead of disabled thread dispatching.

Update #2555.

cpukit/libmisc/monitor/mon-config.c

@@ -66,7 +66,7 @@ rtems_monitor_config_next(
     if (n >= 1)
         goto failed;
 
-    _Thread_Disable_dispatch();
+    _Objects_Allocator_lock();
 
     *next_id += 1;
     return (const void *) c;

cpukit/libmisc/monitor/mon-driver.c

@@ -69,7 +69,7 @@ rtems_monitor_driver_next(
     if (n >= _IO_Number_of_drivers)
         goto failed;
 
-    _Thread_Disable_dispatch();
+    _Objects_Allocator_lock();
 
     /*
      * dummy up a fake id and name for this item

cpukit/libmisc/monitor/mon-itask.c

@@ -46,7 +46,7 @@ rtems_monitor_init_task_next(
     if (n >= Configuration_RTEMS_API.number_of_initialization_tasks)
         goto failed;
 
-    _Thread_Disable_dispatch();
+    _Objects_Allocator_lock();
 
     itask = Configuration_RTEMS_API.User_initialization_tasks_table + n;
 

cpukit/libmisc/monitor/mon-mpci.c

@@ -79,7 +79,7 @@ rtems_monitor_mpci_next(
     if ( ! c->User_multiprocessing_table)
         goto failed;
 
-    _Thread_Disable_dispatch();
+    _Objects_Allocator_lock();
 
     *next_id += 1;
     return (void *) c;

cpukit/libmisc/monitor/mon-object.c

@@ -262,7 +262,7 @@ rtems_monitor_object_canonical_next(
 
      if (raw_item) {
        info->canonical(canonical, raw_item);
-       _Thread_Enable_dispatch();
+       _Objects_Allocator_unlock();
      }
   }
   return next_id;

cpukit/libmisc/monitor/mon-symbols.c

@@ -318,7 +318,7 @@ rtems_monitor_symbol_next(
     if (table->sorted == 0)
         rtems_symbol_sort(table);
 
-    _Thread_Disable_dispatch();
+    _Objects_Allocator_lock();
 
     *next_id += 1;
     return (const void *) (table->addresses + n);