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) 1992-2009, 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 -- Convert_Ids -- 88 ----------------- 89 90 function Convert_Ids (T : Task_Id) return System.Tasking.Task_Id is 91 begin 92 return System.Tasking.Task_Id (T); 93 end Convert_Ids; 94 95 function Convert_Ids (T : System.Tasking.Task_Id) return Task_Id is 96 begin 97 return Task_Id (T); 98 end Convert_Ids; 99 100 ------------------ 101 -- Current_Task -- 102 ------------------ 103 104 function Current_Task return Task_Id is 105 begin 106 return Convert_Ids (System.Task_Primitives.Operations.Self); 107 end Current_Task; 108 109 ----------- 110 -- Image -- 111 ----------- 112 113 function Image (T : Task_Id) return String is 114 function To_Address is new 115 Ada.Unchecked_Conversion 116 (Task_Id, System.Task_Primitives.Task_Address); 117 118 begin 119 if T = Null_Task_Id then 120 return ""; 121 122 elsif T.Common.Task_Image_Len = 0 then 123 return System.Address_Image (To_Address (T)); 124 125 else 126 return T.Common.Task_Image (1 .. T.Common.Task_Image_Len) 127 & "_" & System.Address_Image (To_Address (T)); 128 end if; 129 end Image; 130 131 ----------------- 132 -- Is_Callable -- 133 ----------------- 134 135 function Is_Callable (T : Task_Id) return Boolean is 136 Result : Boolean; 137 Id : constant System.Tasking.Task_Id := Convert_Ids (T); 138 begin 139 if T = Null_Task_Id then 140 raise Program_Error; 141 else 142 System.Soft_Links.Abort_Defer.all; 143 144 if Single_Lock then 145 STPO.Lock_RTS; 146 end if; 147 148 STPO.Write_Lock (Id); 149 Result := Id.Callable; 150 STPO.Unlock (Id); 151 152 if Single_Lock then 153 STPO.Unlock_RTS; 154 end if; 155 156 System.Soft_Links.Abort_Undefer.all; 157 return Result; 158 end if; 159 end Is_Callable; 160 161 ------------------- 162 -- Is_Terminated -- 163 ------------------- 164 165 function Is_Terminated (T : Task_Id) return Boolean is 166 Result : Boolean; 167 Id : constant System.Tasking.Task_Id := Convert_Ids (T); 168 169 use System.Tasking; 170 171 begin 172 if T = Null_Task_Id then 173 raise Program_Error; 174 else 175 System.Soft_Links.Abort_Defer.all; 176 177 if Single_Lock then 178 STPO.Lock_RTS; 179 end if; 180 181 STPO.Write_Lock (Id); 182 Result := Id.Common.State = Terminated; 183 STPO.Unlock (Id); 184 185 if Single_Lock then 186 STPO.Unlock_RTS; 187 end if; 188 189 System.Soft_Links.Abort_Undefer.all; 190 return Result; 191 end if; 192 end Is_Terminated; 193 194end Ada.Task_Identification; 195