-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- GNARL 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 2, or (at your option) any later ver- --
--- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
+-- 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNARL; see file COPYING. If not, write --
--- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
+-- 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 --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. --
-- Extensive contributions were provided by Ada Core Technologies, Inc. --
-- System.Protected_Objects.Single_Entry
with System.Task_Info;
--- used for Task_Info_Type
-
with System.Parameters;
--- used for Size_Type
package System.Tasking.Restricted.Stages is
pragma Elaborate_Body;
-- Priority is the task's priority (assumed to be in the
-- System.Any_Priority'Range)
--
- -- Stack_Address is the start address of the stack associated to the
- -- task, in case it has been preallocated by the compiler; it is equal
- -- to Null_Address when the stack needs to be allocated by the
- -- underlying operating system.
+ -- Stack_Address is the start address of the stack associated to the task,
+ -- in case it has been preallocated by the compiler; it is equal to
+ -- Null_Address when the stack needs to be allocated by the underlying
+ -- operating system.
--
-- Size is the stack size of the task to create
--
--
-- State is the compiler generated task's procedure body
--
- -- Discriminants is a pointer to a limited record whose discriminants
- -- are those of the task to create. This parameter should be passed as
- -- the single argument to State.
+ -- Discriminants is a pointer to a limited record whose discriminants are
+ -- those of the task to create. This parameter should be passed as the
+ -- single argument to State.
--
-- Elaborated is a pointer to a Boolean that must be set to true on exit
- -- if the task could be sucessfully elaborated.
+ -- if the task could be successfully elaborated.
--
-- Chain is a linked list of task that needs to be created. On exit,
- -- Created_Task.Activation_Link will be Chain.T_ID, and Chain.T_ID
- -- will be Created_Task (e.g the created task will be linked at the front
- -- of Chain).
+ -- Created_Task.Activation_Link will be Chain.T_ID, and Chain.T_ID will be
+ -- Created_Task (the created task will be linked at the front of Chain).
--
- -- Task_Image is a string created by the compiler that the
- -- run time can store to ease the debugging and the
- -- Ada.Task_Identification facility.
+ -- Task_Image is a string created by the compiler that the run time can
+ -- store to ease the debugging and the Ada.Task_Identification facility.
--
-- Created_Task is the resulting task.
--
-- version of this procedure had code to reverse the chain, so as to
-- activate the tasks in the order of declaration. This might be nice, but
-- it is not needed if priority-based scheduling is supported, since all
- -- the activated tasks synchronize on the activators lock before they
- -- start activating and so they should start activating in priority order.
+ -- the activated tasks synchronize on the activators lock before they start
+ -- activating and so they should start activating in priority order.
procedure Complete_Restricted_Activation;
- -- Compiler interface only. Do not call from within the RTS.
- -- This should be called from the task body at the end of
- -- the elaboration code for its declarative part.
- -- Decrement the count of tasks to be activated by the activator and
- -- wake it up so it can check to see if all tasks have been activated.
- -- Except for the environment task, which should never call this procedure,
- -- T.Activator should only be null iff T has completed activation.
+ -- Compiler interface only. Do not call from within the RTS. This should be
+ -- called from the task body at the end of the elaboration code for its
+ -- declarative part. Decrement the count of tasks to be activated by the
+ -- activator and wake it up so it can check to see if all tasks have been
+ -- activated. Except for the environment task, which should never call this
+ -- procedure, T.Activator should only be null iff T has completed
+ -- activation.
procedure Complete_Restricted_Task;
- -- Compiler interface only. Do not call from within the RTS.
- -- This should be called from an implicit at-end handler
- -- associated with the task body, when it completes.
- -- From this point, the current task will become not callable.
- -- If the current task have not completed activation, this should be done
- -- now in order to wake up the activator (the environment task).
+ -- Compiler interface only. Do not call from within the RTS. This should be
+ -- called from an implicit at-end handler associated with the task body,
+ -- when it completes. From this point, the current task will become not
+ -- callable. If the current task have not completed activation, this should
+ -- be done now in order to wake up the activator (the environment task).
function Restricted_Terminated (T : Task_Id) return Boolean;
- -- Compiler interface only. Do not call from within the RTS.
- -- This is called by the compiler to implement the 'Terminated attribute.
+ -- Compiler interface only. Do not call from within the RTS. This is called
+ -- by the compiler to implement the 'Terminated attribute.
--
-- source code:
-- T1'Terminated
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