1 ------------------------------------------------------------------------------
3 -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- SYSTEM.TASK_PRIMITIVES.OPERATIONS.SPECIFIC --
9 -- Copyright (C) 1992-2004, 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 2, or (at your option) any later ver- --
14 -- sion. GNARL 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNARL; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNARL was developed by the GNARL team at Florida State University. --
30 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
32 ------------------------------------------------------------------------------
34 -- This is a version for Solaris native threads
36 separate (System
.Task_Primitives
.Operations
)
37 package body Specific
is
43 procedure Initialize
(Environment_Task
: Task_Id
) is
44 Result
: Interfaces
.C
.int
;
46 Result
:= thr_setspecific
(ATCB_Key
, To_Address
(Environment_Task
));
47 pragma Assert
(Result
= 0);
54 function Is_Valid_Task
return Boolean is
55 Unknown_Task
: aliased System
.Address
;
56 Result
: Interfaces
.C
.int
;
58 Result
:= thr_getspecific
(ATCB_Key
, Unknown_Task
'Unchecked_Access);
59 pragma Assert
(Result
= 0);
60 return Unknown_Task
/= System
.Null_Address
;
67 procedure Set
(Self_Id
: Task_Id
) is
68 Result
: Interfaces
.C
.int
;
70 Result
:= thr_setspecific
(ATCB_Key
, To_Address
(Self_Id
));
71 pragma Assert
(Result
= 0);
78 -- To make Ada tasks and C threads interoperate better, we have
79 -- added some functionality to Self. Suppose a C main program
80 -- (with threads) calls an Ada procedure and the Ada procedure
81 -- calls the tasking run-time system. Eventually, a call will be
82 -- made to self. Since the call is not coming from an Ada task,
83 -- there will be no corresponding ATCB.
85 -- What we do in Self is to catch references that do not come
86 -- from recognized Ada tasks, and create an ATCB for the calling
89 -- The new ATCB will be "detached" from the normal Ada task
90 -- master hierarchy, much like the existing implicitly created
91 -- signal-server tasks.
93 function Self
return Task_Id
is
94 Result
: Interfaces
.C
.int
;
95 Self_Id
: aliased System
.Address
;
97 Result
:= thr_getspecific
(ATCB_Key
, Self_Id
'Unchecked_Access);
98 pragma Assert
(Result
= 0);
100 if Self_Id
= System
.Null_Address
then
101 return Register_Foreign_Thread
;
103 return To_Task_Id
(Self_Id
);