112 lines
4.3 KiB
Ada
112 lines
4.3 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUNTIME COMPONENTS --
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-- --
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-- G N A T . T H R E A D S --
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-- --
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-- B o d y --
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-- --
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-- $Revision: 1.6 $
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-- --
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-- Copyright (C) 1998-2000 Ada Core Technologies, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 2, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING. If not, write --
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-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
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-- MA 02111-1307, USA. --
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-- --
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-- As a special exception, if other files instantiate generics from this --
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-- unit, or you link this unit with other files to produce an executable, --
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-- this unit does not by itself cause the resulting executable to be --
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-- covered by the GNU General Public License. This exception does not --
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-- however invalidate any other reasons why the executable file might be --
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-- covered by the GNU Public License. --
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-- --
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-- GNAT is maintained by Ada Core Technologies Inc (http://www.gnat.com). --
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-- --
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------------------------------------------------------------------------------
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with Ada.Task_Identification; use Ada.Task_Identification;
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with System.Task_Primitives.Operations;
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with System.Tasking;
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with System.OS_Interface;
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with Unchecked_Conversion;
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package body GNAT.Threads is
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use System;
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function To_Addr is new Unchecked_Conversion (Task_Id, Address);
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function To_Id is new Unchecked_Conversion (Address, Task_Id);
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function To_Id is new Unchecked_Conversion (Address, Tasking.Task_ID);
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type Code_Proc is access procedure (Id : Address; Parm : Void_Ptr);
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task type Thread
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(Stsz : Natural;
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Prio : Any_Priority;
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Parm : Void_Ptr;
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Code : Code_Proc)
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is
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pragma Priority (Prio);
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pragma Storage_Size (Stsz);
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end Thread;
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task body Thread is
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begin
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Code.all (To_Addr (Current_Task), Parm);
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end Thread;
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type Tptr is access Thread;
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-------------------
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-- Create_Thread --
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-------------------
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function Create_Thread
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(Code : Address;
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Parm : Void_Ptr;
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Size : Natural;
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Prio : Integer) return System.Address
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is
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TP : Tptr;
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function To_CP is new Unchecked_Conversion (Address, Code_Proc);
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begin
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TP := new Thread (Size, Prio, Parm, To_CP (Code));
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return To_Addr (TP'Identity);
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end Create_Thread;
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--------------------
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-- Destroy_Thread --
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--------------------
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procedure Destroy_Thread (Id : Address) is
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Tid : Task_Id := To_Id (Id);
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begin
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Abort_Task (Tid);
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end Destroy_Thread;
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----------------
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-- Get_Thread --
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----------------
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procedure Get_Thread (Id : Address; Thread : Address) is
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use System.OS_Interface;
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Thr : Thread_Id;
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for Thr use at Thread;
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begin
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Thr := Task_Primitives.Operations.Get_Thread_Id (To_Id (Id));
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end Get_Thread;
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end GNAT.Threads;
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