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------------------------------------------------------------------------------
-- --
-- GNAT RUNTIME COMPONENTS --
-- --
-- G N A T . T H R E A D S --
-- --
-- B o d y --
-- --
-- --
-- Copyright (C) 1998-2000 Ada Core Technologies, 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, 59 Temple Place - Suite 330, Boston, --
-- MA 02111-1307, 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 is maintained by Ada Core Technologies Inc (http://www.gnat.com). --
-- --
------------------------------------------------------------------------------
with Ada.Task_Identification; use Ada.Task_Identification;
with System.Task_Primitives.Operations;
with System.Tasking;
with System.OS_Interface;
with Unchecked_Conversion;
package body GNAT.Threads is
use System;
function To_Addr is new Unchecked_Conversion (Task_Id, Address);
function To_Id is new Unchecked_Conversion (Address, Task_Id);
function To_Id is new Unchecked_Conversion (Address, Tasking.Task_ID);
type Code_Proc is access procedure (Id : Address; Parm : Void_Ptr);
task type Thread
(Stsz : Natural;
Prio : Any_Priority;
Parm : Void_Ptr;
Code : Code_Proc)
is
pragma Priority (Prio);
pragma Storage_Size (Stsz);
end Thread;
task body Thread is
begin
Code.all (To_Addr (Current_Task), Parm);
end Thread;
type Tptr is access Thread;
-------------------
-- Create_Thread --
-------------------
function Create_Thread
(Code : Address;
Parm : Void_Ptr;
Size : Natural;
Prio : Integer) return System.Address
is
TP : Tptr;
function To_CP is new Unchecked_Conversion (Address, Code_Proc);
begin
TP := new Thread (Size, Prio, Parm, To_CP (Code));
return To_Addr (TP'Identity);
end Create_Thread;
--------------------
-- Destroy_Thread --
--------------------
procedure Destroy_Thread (Id : Address) is
Tid : Task_Id := To_Id (Id);
begin
Abort_Task (Tid);
end Destroy_Thread;
----------------
-- Get_Thread --
----------------
procedure Get_Thread (Id : Address; Thread : Address) is
use System.OS_Interface;
Thr : Thread_Id;
for Thr use at Thread;
begin
Thr := Task_Primitives.Operations.Get_Thread_Id (To_Id (Id));
end Get_Thread;
end GNAT.Threads;
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