1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- S Y S T E M . T A S K _ P R I M I T I V E S . O P E R A T I O N S . --
10 -- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
12 -- GNARL is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNARL; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
21 -- Boston, MA 02110-1301, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNARL was developed by the GNARL team at Florida State University. --
31 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
33 ------------------------------------------------------------------------------
35 -- This is a version for Solaris native threads
37 separate (System.Task_Primitives.Operations)
38 package body Specific is
44 procedure Initialize (Environment_Task : Task_Id) is
45 pragma Unreferenced (Environment_Task);
46 Result : Interfaces.C.int;
48 Result := thr_keycreate (ATCB_Key'Access, System.Null_Address);
49 pragma Assert (Result = 0);
56 function Is_Valid_Task return Boolean is
57 Unknown_Task : aliased System.Address;
58 Result : Interfaces.C.int;
60 Result := thr_getspecific (ATCB_Key, Unknown_Task'Unchecked_Access);
61 pragma Assert (Result = 0);
62 return Unknown_Task /= System.Null_Address;
69 procedure Set (Self_Id : Task_Id) is
70 Result : Interfaces.C.int;
72 Result := thr_setspecific (ATCB_Key, To_Address (Self_Id));
73 pragma Assert (Result = 0);
80 -- To make Ada tasks and C threads interoperate better, we have
81 -- added some functionality to Self. Suppose a C main program
82 -- (with threads) calls an Ada procedure and the Ada procedure
83 -- calls the tasking run-time system. Eventually, a call will be
84 -- made to self. Since the call is not coming from an Ada task,
85 -- there will be no corresponding ATCB.
87 -- What we do in Self is to catch references that do not come
88 -- from recognized Ada tasks, and create an ATCB for the calling
91 -- The new ATCB will be "detached" from the normal Ada task
92 -- master hierarchy, much like the existing implicitly created
93 -- signal-server tasks.
95 function Self return Task_Id is
96 Result : Interfaces.C.int;
97 Self_Id : aliased System.Address;
99 Result := thr_getspecific (ATCB_Key, Self_Id'Unchecked_Access);
100 pragma Assert (Result = 0);
102 if Self_Id = System.Null_Address then
103 return Register_Foreign_Thread;
105 return To_Task_Id (Self_Id);