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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . T A S K _ I D E N T I F I C A T I O N --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2007, 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 2, 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 GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, USA. --
-- --
-- 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. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with System.Address_Image;
with System.Parameters;
with System.Soft_Links;
with System.Task_Primitives.Operations;
with Ada.Unchecked_Conversion;
pragma Warnings (Off);
-- Allow withing of non-Preelaborated units in Ada 2005 mode where this
-- package will be categorized as Preelaborate. See AI-362 for details.
-- It is safe in the context of the run-time to violate the rules!
with System.Tasking.Utilities;
-- Used for Abort_Tasks
pragma Warnings (On);
package body Ada.Task_Identification is
use System.Parameters;
package STPO renames System.Task_Primitives.Operations;
-----------------------
-- Local Subprograms --
-----------------------
function Convert_Ids (T : Task_Id) return System.Tasking.Task_Id;
function Convert_Ids (T : System.Tasking.Task_Id) return Task_Id;
pragma Inline (Convert_Ids);
-- Conversion functions between different forms of Task_Id
---------
-- "=" --
---------
function "=" (Left, Right : Task_Id) return Boolean is
begin
return System.Tasking."=" (Convert_Ids (Left), Convert_Ids (Right));
end "=";
-----------------
-- Abort_Task --
----------------
procedure Abort_Task (T : Task_Id) is
begin
if T = Null_Task_Id then
raise Program_Error;
else
System.Tasking.Utilities.Abort_Tasks
(System.Tasking.Task_List'(1 => Convert_Ids (T)));
end if;
end Abort_Task;
-----------------
-- Convert_Ids --
-----------------
function Convert_Ids (T : Task_Id) return System.Tasking.Task_Id is
begin
return System.Tasking.Task_Id (T);
end Convert_Ids;
function Convert_Ids (T : System.Tasking.Task_Id) return Task_Id is
begin
return Task_Id (T);
end Convert_Ids;
------------------
-- Current_Task --
------------------
function Current_Task return Task_Id is
begin
return Convert_Ids (System.Task_Primitives.Operations.Self);
end Current_Task;
-----------
-- Image --
-----------
function Image (T : Task_Id) return String is
function To_Address is new
Ada.Unchecked_Conversion (Task_Id, System.Address);
begin
if T = Null_Task_Id then
return "";
elsif T.Common.Task_Image_Len = 0 then
return System.Address_Image (To_Address (T));
else
return T.Common.Task_Image (1 .. T.Common.Task_Image_Len)
& "_" & System.Address_Image (To_Address (T));
end if;
end Image;
-----------------
-- Is_Callable --
-----------------
function Is_Callable (T : Task_Id) return Boolean is
Result : Boolean;
Id : constant System.Tasking.Task_Id := Convert_Ids (T);
begin
if T = Null_Task_Id then
raise Program_Error;
else
System.Soft_Links.Abort_Defer.all;
if Single_Lock then
STPO.Lock_RTS;
end if;
STPO.Write_Lock (Id);
Result := Id.Callable;
STPO.Unlock (Id);
if Single_Lock then
STPO.Unlock_RTS;
end if;
System.Soft_Links.Abort_Undefer.all;
return Result;
end if;
end Is_Callable;
-------------------
-- Is_Terminated --
-------------------
function Is_Terminated (T : Task_Id) return Boolean is
Result : Boolean;
Id : constant System.Tasking.Task_Id := Convert_Ids (T);
use System.Tasking;
begin
if T = Null_Task_Id then
raise Program_Error;
else
System.Soft_Links.Abort_Defer.all;
if Single_Lock then
STPO.Lock_RTS;
end if;
STPO.Write_Lock (Id);
Result := Id.Common.State = Terminated;
STPO.Unlock (Id);
if Single_Lock then
STPO.Unlock_RTS;
end if;
System.Soft_Links.Abort_Undefer.all;
return Result;
end if;
end Is_Terminated;
end Ada.Task_Identification;
|
