1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME COMPONENTS -- 4-- -- 5-- A D A . T A S K _ I D E N T I F I C A T I O N -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1992-2013, Free Software Foundation, Inc. -- 10-- -- 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. -- 17-- -- 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. -- 21-- -- 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/>. -- 26-- -- 27-- GNAT was originally developed by the GNAT team at New York University. -- 28-- Extensive contributions were provided by Ada Core Technologies Inc. -- 29-- -- 30------------------------------------------------------------------------------ 31 32with System.Address_Image; 33with System.Parameters; 34with System.Soft_Links; 35with System.Task_Primitives; 36with System.Task_Primitives.Operations; 37with Ada.Unchecked_Conversion; 38 39pragma 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. 43 44with System.Tasking.Utilities; 45 46pragma Warnings (On); 47 48package body Ada.Task_Identification is 49 50 use System.Parameters; 51 52 package STPO renames System.Task_Primitives.Operations; 53 54 ----------------------- 55 -- Local Subprograms -- 56 ----------------------- 57 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 62 63 --------- 64 -- "=" -- 65 --------- 66 67 function "=" (Left, Right : Task_Id) return Boolean is 68 begin 69 return System.Tasking."=" (Convert_Ids (Left), Convert_Ids (Right)); 70 end "="; 71 72 ----------------- 73 -- Abort_Task -- 74 ---------------- 75 76 procedure Abort_Task (T : Task_Id) is 77 begin 78 if T = Null_Task_Id then 79 raise Program_Error; 80 else 81 System.Tasking.Utilities.Abort_Tasks 82 (System.Tasking.Task_List'(1 => Convert_Ids (T))); 83 end if; 84 end Abort_Task; 85 86 ---------------------------- 87 -- Activation_Is_Complete -- 88 ---------------------------- 89 90 function Activation_Is_Complete (T : Task_Id) return Boolean is 91 use type System.Tasking.Task_Id; 92 begin 93 return Convert_Ids (T).Common.Activator = null; 94 end Activation_Is_Complete; 95 96 ----------------- 97 -- Convert_Ids -- 98 ----------------- 99 100 function Convert_Ids (T : Task_Id) return System.Tasking.Task_Id is 101 begin 102 return System.Tasking.Task_Id (T); 103 end Convert_Ids; 104 105 function Convert_Ids (T : System.Tasking.Task_Id) return Task_Id is 106 begin 107 return Task_Id (T); 108 end Convert_Ids; 109 110 ------------------ 111 -- Current_Task -- 112 ------------------ 113 114 function Current_Task return Task_Id is 115 begin 116 return Convert_Ids (System.Task_Primitives.Operations.Self); 117 end Current_Task; 118 119 ---------------------- 120 -- Environment_Task -- 121 ---------------------- 122 123 function Environment_Task return Task_Id is 124 begin 125 return Convert_Ids (System.Task_Primitives.Operations.Environment_Task); 126 end Environment_Task; 127 128 ----------- 129 -- Image -- 130 ----------- 131 132 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); 136 137 begin 138 if T = Null_Task_Id then 139 return ""; 140 141 elsif T.Common.Task_Image_Len = 0 then 142 return System.Address_Image (To_Address (T)); 143 144 else 145 return T.Common.Task_Image (1 .. T.Common.Task_Image_Len) 146 & "_" & System.Address_Image (To_Address (T)); 147 end if; 148 end Image; 149 150 ----------------- 151 -- Is_Callable -- 152 ----------------- 153 154 function Is_Callable (T : Task_Id) return Boolean is 155 Result : Boolean; 156 Id : constant System.Tasking.Task_Id := Convert_Ids (T); 157 begin 158 if T = Null_Task_Id then 159 raise Program_Error; 160 else 161 System.Soft_Links.Abort_Defer.all; 162 163 if Single_Lock then 164 STPO.Lock_RTS; 165 end if; 166 167 STPO.Write_Lock (Id); 168 Result := Id.Callable; 169 STPO.Unlock (Id); 170 171 if Single_Lock then 172 STPO.Unlock_RTS; 173 end if; 174 175 System.Soft_Links.Abort_Undefer.all; 176 return Result; 177 end if; 178 end Is_Callable; 179 180 ------------------- 181 -- Is_Terminated -- 182 ------------------- 183 184 function Is_Terminated (T : Task_Id) return Boolean is 185 Result : Boolean; 186 Id : constant System.Tasking.Task_Id := Convert_Ids (T); 187 188 use System.Tasking; 189 190 begin 191 if T = Null_Task_Id then 192 raise Program_Error; 193 else 194 System.Soft_Links.Abort_Defer.all; 195 196 if Single_Lock then 197 STPO.Lock_RTS; 198 end if; 199 200 STPO.Write_Lock (Id); 201 Result := Id.Common.State = Terminated; 202 STPO.Unlock (Id); 203 204 if Single_Lock then 205 STPO.Unlock_RTS; 206 end if; 207 208 System.Soft_Links.Abort_Undefer.all; 209 return Result; 210 end if; 211 end Is_Terminated; 212 213end Ada.Task_Identification; 214