1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- A D A . T A S K _ I D E N T I F I C A T I O N --
9 -- Copyright (C) 1992-2013, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
30 ------------------------------------------------------------------------------
32 with System.Address_Image;
33 with System.Parameters;
34 with System.Soft_Links;
35 with System.Task_Primitives;
36 with System.Task_Primitives.Operations;
37 with Ada.Unchecked_Conversion;
39 pragma Warnings (Off);
40 -- Allow withing of non-Preelaborated units in Ada 2005 mode where this
41 -- package will be categorized as Preelaborate. See AI-362 for details.
42 -- It is safe in the context of the run-time to violate the rules.
44 with System.Tasking.Utilities;
48 package body Ada.Task_Identification is
50 use System.Parameters;
52 package STPO renames System.Task_Primitives.Operations;
54 -----------------------
55 -- Local Subprograms --
56 -----------------------
58 function Convert_Ids (T : Task_Id) return System.Tasking.Task_Id;
59 function Convert_Ids (T : System.Tasking.Task_Id) return Task_Id;
60 pragma Inline (Convert_Ids);
61 -- Conversion functions between different forms of Task_Id
67 function "=" (Left, Right : Task_Id) return Boolean is
69 return System.Tasking."=" (Convert_Ids (Left), Convert_Ids (Right));
76 procedure Abort_Task (T : Task_Id) is
78 if T = Null_Task_Id then
81 System.Tasking.Utilities.Abort_Tasks
82 (System.Tasking.Task_List'(1 => Convert_Ids (T)));
86 ----------------------------
87 -- Activation_Is_Complete --
88 ----------------------------
90 function Activation_Is_Complete (T : Task_Id) return Boolean is
91 use type System.Tasking.Task_Id;
93 return Convert_Ids (T).Common.Activator = null;
94 end Activation_Is_Complete;
100 function Convert_Ids (T : Task_Id) return System.Tasking.Task_Id is
102 return System.Tasking.Task_Id (T);
105 function Convert_Ids (T : System.Tasking.Task_Id) return Task_Id is
114 function Current_Task return Task_Id is
116 return Convert_Ids (System.Task_Primitives.Operations.Self);
119 ----------------------
120 -- Environment_Task --
121 ----------------------
123 function Environment_Task return Task_Id is
125 return Convert_Ids (System.Task_Primitives.Operations.Environment_Task);
126 end Environment_Task;
132 function Image (T : Task_Id) return String is
133 function To_Address is new
134 Ada.Unchecked_Conversion
135 (Task_Id, System.Task_Primitives.Task_Address);
138 if T = Null_Task_Id then
141 elsif T.Common.Task_Image_Len = 0 then
142 return System.Address_Image (To_Address (T));
145 return T.Common.Task_Image (1 .. T.Common.Task_Image_Len)
146 & "_" & System.Address_Image (To_Address (T));
154 function Is_Callable (T : Task_Id) return Boolean is
156 Id : constant System.Tasking.Task_Id := Convert_Ids (T);
158 if T = Null_Task_Id then
161 System.Soft_Links.Abort_Defer.all;
167 STPO.Write_Lock (Id);
168 Result := Id.Callable;
175 System.Soft_Links.Abort_Undefer.all;
184 function Is_Terminated (T : Task_Id) return Boolean is
186 Id : constant System.Tasking.Task_Id := Convert_Ids (T);
191 if T = Null_Task_Id then
194 System.Soft_Links.Abort_Defer.all;
200 STPO.Write_Lock (Id);
201 Result := Id.Common.State = Terminated;
208 System.Soft_Links.Abort_Undefer.all;
213 end Ada.Task_Identification;