------------------------------------------------------------------------------ ------------------------------------------------------------------------------ -- Cheddar is a GNU GPL real-time scheduling analysis tool. -- This program provides services to automatically check schedulability and -- other performance criteria of real-time architecture models. -- -- Copyright (C) 2002-2016, Frank Singhoff, Alain Plantec, Jerome Legrand -- -- The Cheddar project was started in 2002 by -- Frank Singhoff, Lab-STICC UMR 6285 laboratory, Université de Bretagne Occidentale -- -- Cheddar has been published in the "Agence de Protection des Programmes/France" in 2008. -- Since 2008, Ellidiss technologies also contributes to the development of -- Cheddar and provides industrial support. -- -- The full list of contributors and sponsors can be found in AUTHORS.txt and SPONSORS.txt -- -- This program is free software; you can redistribute it and/or modify -- it under the terms of the GNU General Public License as published by -- the Free Software Foundation; either version 2 of the License, or -- (at your option) any later version. -- -- This program is distributed in the hope that it will be useful, -- but WITHOUT ANY WARRANTY; without even the implied warranty of -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -- GNU General Public License for more details. -- -- You should have received a copy of the GNU General Public License -- along with this program; if not, write to the Free Software -- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -- -- -- Contact : cheddar@listes.univ-brest.fr -- ------------------------------------------------------------------------------ -- Last update : -- $Rev: 1249 $ -- $Date: 2014-08-28 07:02:15 +0200 (Fri, 28 Aug 2014) $ -- $Author: singhoff $ ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ with Xml_Tag; use Xml_Tag; with double_util; use double_util; with Translate; use Translate; with unbounded_strings; use unbounded_strings; with Text_IO; use Text_IO; with Ada.Exceptions; use Ada.Exceptions; with GNAT.Current_Exception; use GNAT.Current_Exception; package body Scheduler.Fixed_Priority.aperiodic_server is procedure Check_Before_Scheduling (My_Scheduler : in aperiodic_server_Scheduler; My_Tasks : in Tasks_Set; Processor_Name : in Unbounded_String) is begin if My_Scheduler.parameters.period <= 0 then Raise_Exception (Invalid_scheduler_parameter'Identity, "Invalid period value"); end if; if My_Scheduler.parameters.capacity <= 0 then Raise_Exception (Invalid_scheduler_parameter'Identity, "Invalid capacity value"); end if; end Check_Before_Scheduling; procedure Do_Election (My_Scheduler : in out aperiodic_server_Scheduler; Si : in out Scheduling_Information; Result : in out Scheduling_Sequence_Ptr; Msg : in out Unbounded_String; Current_Time : in Natural; Processor_Name : in Unbounded_String; Address_Space_Name : in Unbounded_String; My_Dependencies : in Tasks_Dependencies_Ptr; With_Offsets : in Boolean; With_Precedencies : in Boolean; With_Resources : in Boolean; With_jitters : in Boolean; With_minimize_preemption : in Boolean; Event_To_Generate : in Time_Unit_Event_Type_Boolean_Table; Elected : in out Tasks_Range; No_Task : in out Boolean) is I : Tasks_Range := 0; begin My_Scheduler.periodic_Highest_Priority := Natural'First; My_Scheduler.aperiodic_Highest_Priority := Natural'First; My_Scheduler.periodic_Elected := 0; My_Scheduler.aperiodic_Elected := 0; -- For each task, call "check_resources" to -- take care of priority modification (PCP and PIP) -- loop if not Si.Tcbs (i).already_run_at_current_time then if (Si.Tcbs (I).Tsk.cpu_name = Processor_Name) and ((Address_Space_Name = To_Unbounded_String ("")) or (Address_Space_Name = Si.Tcbs (I).Tsk.address_space_name)) then if (Si.Tcbs (I).Wake_Up_Time <= Current_Time) and (Si.Tcbs (I).Rest_Of_Capacity /= 0) then Check_jitter(Si.Tcbs (I), Current_Time, Si.Tcbs(I).is_jitter_ready ); if (With_jitters = False) or (Si.Tcbs (I).is_jitter_ready) then if (With_Offsets = False) or Check_Offset (Si.Tcbs (I), Current_Time) then if (With_Precedencies = False) or Check_Precedencies (Si, My_Dependencies, Current_Time, Si.Tcbs (I)) then if With_Resources then Check_Resource (My_Scheduler, Si, Result, Current_Time, Si.Tcbs (I), Fixed_Priority_Tcb_Ptr (Si.Tcbs (I)).Is_resource_Ready, Event_To_Generate); end if; end if; end if; end if; end if; end if; end if; I := I + 1; exit when Si.Tcbs (I) = null; end loop; -- Look for the Highest periodic/sporadic/poisson process ready -- priority task -- I := 0; loop if ((Si.Tcbs (I).Tsk.task_type = Periodic_Type) or (Si.Tcbs (I).Tsk.task_type = Sporadic_Type) or (Si.Tcbs (I).Tsk.task_type = Poisson_Type)) then if (Si.Tcbs (I).Tsk.cpu_name = Processor_Name) then if Check_Core_Assignment(my_scheduler, Si.Tcbs (I)) then if (Si.Tcbs (I).Wake_Up_Time <= Current_Time) and (Natural ( Fixed_Priority_Tcb_Ptr (Si.Tcbs (I)).Current_Priority) > My_Scheduler.periodic_Highest_Priority) and (Si.Tcbs (I).Rest_Of_Capacity /= 0) then Check_jitter(Si.Tcbs (I), Current_Time, Si.Tcbs(I).is_jitter_ready ); if (With_jitters = False) or (Si.Tcbs (I).is_jitter_ready) then if (With_Offsets = False) or Check_Offset (Si.Tcbs (I), Current_Time) then if (With_Precedencies = False) or Check_Precedencies (Si, My_Dependencies, Current_Time, Si.Tcbs (I)) then if (With_Resources = False) or Fixed_Priority_Tcb_Ptr (Si.Tcbs (I)).Is_resource_Ready then My_Scheduler.periodic_Highest_Priority := Natural ( Fixed_Priority_Tcb_Ptr (Si.Tcbs (I)). Current_Priority); My_Scheduler.periodic_Elected := I; end if; end if; end if; end if; end if; end if; end if; end if; I := I + 1; exit when Si.Tcbs (I) = null; end loop; -- Check if some aperiodic task exists and select the Highest priority -- aperiodic task -- I := 0; loop if not Si.Tcbs (i).already_run_at_current_time then if (Si.Tcbs (I).Tsk.task_type = Aperiodic_Type) then if (Si.Tcbs (I).Tsk.cpu_name = Processor_Name) then if Check_Core_Assignment(my_scheduler, Si.Tcbs (I)) then if (Si.Tcbs (I).Wake_Up_Time <= Current_Time) and (Natural ( Fixed_Priority_Tcb_Ptr (Si.Tcbs (I)).Current_Priority) > My_Scheduler.aperiodic_Highest_Priority) and (Si.Tcbs (I).Rest_Of_Capacity /= 0) then Check_jitter(Si.Tcbs (I), Current_Time, Si.Tcbs(I).is_jitter_ready ); if (With_jitters = False) or (Si.Tcbs (I).is_jitter_ready) then if (With_Offsets = False) or Check_Offset (Si.Tcbs (I), Current_Time) then if (With_Precedencies = False) or Check_Precedencies (Si, My_Dependencies, Current_Time, Si.Tcbs (I)) then if (With_Resources = False) or Fixed_Priority_Tcb_Ptr (Si.Tcbs (I)).Is_resource_Ready then My_Scheduler.aperiodic_Highest_Priority := Natural ( Fixed_Priority_Tcb_Ptr (Si.Tcbs (I)). Current_Priority); My_Scheduler.aperiodic_Elected := I; end if; end if; end if; end if; end if; end if; end if; end if; end if; I := I + 1; exit when Si.Tcbs (I) = null; end loop; end Do_Election; procedure Specific_Scheduler_Initialization (My_Scheduler : in out aperiodic_server_Scheduler; Si : in out Scheduling_Information; Processor_Name : in Unbounded_String; address_space_name : in Unbounded_String; My_Tasks : in out Tasks_Set; my_schedulers : in Scheduler_table; My_Resources : in out Resources_Set; My_Buffers : in out Buffers_Set; My_Messages : in Messages_Set; Msg : in out Unbounded_String) is begin Specific_Scheduler_Initialization (Fixed_Priority_Scheduler (My_Scheduler), Si, Processor_Name, address_space_name, My_Tasks, my_schedulers, My_Resources, My_Buffers, My_Messages, Msg); My_Scheduler.current_server_wake_time := My_Scheduler.parameters.start_time; My_Scheduler.current_server_capacity := My_Scheduler.parameters.capacity; end Specific_Scheduler_Initialization; end Scheduler.Fixed_Priority.aperiodic_server;