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jeremybenn |
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
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-- --
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-- SYSTEM.TASK_PRIMITIVES.OPERATIONS.SPECIFIC --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2011, Free Software Foundation, Inc. --
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-- --
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-- GNARL 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 3, 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. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNARL was developed by the GNARL team at Florida State University. --
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-- Extensive contributions were provided by Ada Core Technologies, Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This is a POSIX-like version of this package
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separate (System.Task_Primitives.Operations)
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package body Specific is
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ATCB_Key : aliased pthread_key_t;
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-- Key used to find the Ada Task_Id associated with a thread
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----------------
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-- Initialize --
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----------------
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procedure Initialize (Environment_Task : Task_Id) is
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pragma Warnings (Off, Environment_Task);
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Result : Interfaces.C.int;
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begin
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Result := pthread_key_create (ATCB_Key'Access, null);
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pragma Assert (Result = 0);
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end Initialize;
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-------------------
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-- Is_Valid_Task --
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-------------------
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function Is_Valid_Task return Boolean is
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begin
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return pthread_getspecific (ATCB_Key) /= System.Null_Address;
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end Is_Valid_Task;
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---------
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-- Set --
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---------
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procedure Set (Self_Id : Task_Id) is
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Result : Interfaces.C.int;
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begin
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Result := pthread_setspecific (ATCB_Key, To_Address (Self_Id));
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pragma Assert (Result = 0);
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end Set;
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----------
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-- Self --
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----------
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function Self return Task_Id is
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begin
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return To_Task_Id (pthread_getspecific (ATCB_Key));
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end Self;
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end Specific;
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