1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- SYSTEM.TASK_PRIMITIVES.OPERATIONS.SPECIFIC --
9 -- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
11 -- GNARL 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 3, 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. --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
27 -- GNARL was developed by the GNARL team at Florida State University. --
28 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
30 ------------------------------------------------------------------------------
32 -- This is a version for Solaris native threads
34 separate (System.Task_Primitives.Operations)
35 package body Specific is
41 procedure Initialize (Environment_Task : Task_Id) is
42 pragma Unreferenced (Environment_Task);
43 Result : Interfaces.C.int;
45 Result := thr_keycreate (ATCB_Key'Access, System.Null_Address);
46 pragma Assert (Result = 0);
53 function Is_Valid_Task return Boolean is
54 Unknown_Task : aliased System.Address;
55 Result : Interfaces.C.int;
57 Result := thr_getspecific (ATCB_Key, Unknown_Task'Unchecked_Access);
58 pragma Assert (Result = 0);
59 return Unknown_Task /= System.Null_Address;
66 procedure Set (Self_Id : Task_Id) is
67 Result : Interfaces.C.int;
69 Result := thr_setspecific (ATCB_Key, To_Address (Self_Id));
70 pragma Assert (Result = 0);
77 -- To make Ada tasks and C threads interoperate better, we have
78 -- added some functionality to Self. Suppose a C main program
79 -- (with threads) calls an Ada procedure and the Ada procedure
80 -- calls the tasking run-time system. Eventually, a call will be
81 -- made to self. Since the call is not coming from an Ada task,
82 -- there will be no corresponding ATCB.
84 -- What we do in Self is to catch references that do not come
85 -- from recognized Ada tasks, and create an ATCB for the calling
88 -- The new ATCB will be "detached" from the normal Ada task
89 -- master hierarchy, much like the existing implicitly created
90 -- signal-server tasks.
92 function Self return Task_Id is
93 Result : Interfaces.C.int;
94 Self_Id : aliased System.Address;
96 Result := thr_getspecific (ATCB_Key, Self_Id'Unchecked_Access);
97 pragma Assert (Result = 0);
99 if Self_Id = System.Null_Address then
100 return Register_Foreign_Thread;
102 return To_Task_Id (Self_Id);