1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- G N A T . T H R E A D S --
9 -- Copyright (C) 1998-2003 Ada Core Technologies, 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 2, 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with Ada.Task_Identification; use Ada.Task_Identification;
35 with System.Task_Primitives.Operations;
37 with System.Tasking.Stages; use System.Tasking.Stages;
38 with System.OS_Interface; use System.OS_Interface;
39 with System.Soft_Links; use System.Soft_Links;
40 with Unchecked_Conversion;
42 package body GNAT.Threads is
46 package STPO renames System.Task_Primitives.Operations;
48 type Thread_Id_Ptr is access all Thread_Id;
50 function To_Addr is new Unchecked_Conversion (Task_Id, Address);
51 function To_Id is new Unchecked_Conversion (Address, Task_Id);
52 function To_Id is new Unchecked_Conversion (Address, Tasking.Task_ID);
53 function To_Tid is new Unchecked_Conversion
54 (Address, Ada.Task_Identification.Task_Id);
55 function To_Thread is new Unchecked_Conversion (Address, Thread_Id_Ptr);
57 type Code_Proc is access procedure (Id : Address; Parm : Void_Ptr);
65 pragma Priority (Prio);
66 pragma Storage_Size (Stsz);
71 Code.all (To_Addr (Current_Task), Parm);
74 type Tptr is access Thread;
80 function Create_Thread
84 Prio : Integer) return System.Address
88 function To_CP is new Unchecked_Conversion (Address, Code_Proc);
91 TP := new Thread (Size, Prio, Parm, To_CP (Code));
92 return To_Addr (TP'Identity);
99 function Register_Thread return System.Address is
101 return Task_Primitives.Operations.Register_Foreign_Thread.all'Address;
104 -----------------------
105 -- Unregister_Thread --
106 -----------------------
108 procedure Unregister_Thread is
109 Self_Id : constant Tasking.Task_ID := Task_Primitives.Operations.Self;
111 Self_Id.Common.State := Tasking.Terminated;
112 Destroy_TSD (Self_Id.Common.Compiler_Data);
114 end Unregister_Thread;
116 --------------------------
117 -- Unregister_Thread_Id --
118 --------------------------
120 procedure Unregister_Thread_Id (Thread : System.Address) is
121 Thr : constant Thread_Id := To_Thread (Thread).all;
124 use type Tasking.Task_ID;
129 T := Tasking.All_Tasks_List;
131 exit when T = null or else STPO.Get_Thread_Id (T) = Thr;
133 T := T.Common.All_Tasks_Link;
139 T.Common.State := Tasking.Terminated;
140 Destroy_TSD (T.Common.Compiler_Data);
143 end Unregister_Thread_Id;
149 procedure Destroy_Thread (Id : Address) is
150 Tid : constant Task_Id := To_Id (Id);
159 procedure Get_Thread (Id : Address; Thread : Address) is
160 use System.OS_Interface;
161 Thr : constant Thread_Id_Ptr := To_Thread (Thread);
163 Thr.all := Task_Primitives.Operations.Get_Thread_Id (To_Id (Id));
171 (Id : System.Address) return Ada.Task_Identification.Task_Id