------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- A D A . D I S P A T C H I N G -- -- -- -- B o d y -- -- -- -- Copyright (C) 2015-2019, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. -- -- -- -- As a special exception under Section 7 of GPL version 3, you are granted -- -- additional permissions described in the GCC Runtime Library Exception, -- -- version 3.1, as published by the Free Software Foundation. -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- . -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with Ada.Exceptions; with System.Tasking; with System.Task_Primitives.Operations; package body Ada.Dispatching is procedure Yield is Self_Id : constant System.Tasking.Task_Id := System.Task_Primitives.Operations.Self; begin -- If pragma Detect_Blocking is active, Program_Error must be -- raised if this potentially blocking operation is called from a -- protected action. if System.Tasking.Detect_Blocking and then Self_Id.Common.Protected_Action_Nesting > 0 then Ada.Exceptions.Raise_Exception (Program_Error'Identity, "potentially blocking operation"); else System.Task_Primitives.Operations.Yield; end if; end Yield; end Ada.Dispatching;