1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- S Y S T E M . O S _ I N T E R F A C E --
9 -- Copyright (C) 1991-2017, Florida State University --
10 -- Copyright (C) 1995-2018, AdaCore --
12 -- GNAT 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 3, or (at your option) any later ver- --
15 -- sion. GNAT 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. --
19 -- As a special exception under Section 7 of GPL version 3, you are granted --
20 -- additional permissions described in the GCC Runtime Library Exception, --
21 -- version 3.1, as published by the Free Software Foundation. --
23 -- You should have received a copy of the GNU General Public License and --
24 -- a copy of the GCC Runtime Library Exception along with this program; --
25 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
26 -- <http://www.gnu.org/licenses/>. --
28 -- GNARL was developed by the GNARL team at Florida State University. --
29 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
31 ------------------------------------------------------------------------------
33 -- This version is for Linux/x32
36 -- Turn off polling, we do not want ATC polling to take place during
37 -- tasking operations. It causes infinite loops and other problems.
39 -- This package encapsulates all direct interfaces to OS services
40 -- that are needed by children of System.
42 with Interfaces
.C
; use Interfaces
.C
;
43 package body System
.OS_Interface
is
49 function Get_Stack_Base
(thread
: pthread_t
) return Address
is
50 pragma Warnings
(Off
, thread
);
60 procedure pthread_init
is
69 function To_Duration
(TS
: timespec
) return Duration is
71 return Duration (TS
.tv_sec
) + Duration (TS
.tv_nsec
) / 10#
1#E9
;
74 ------------------------
75 -- To_Target_Priority --
76 ------------------------
78 function To_Target_Priority
79 (Prio
: System
.Any_Priority
) return Interfaces
.C
.int
82 return Interfaces
.C
.int
(Prio
);
83 end To_Target_Priority
;
89 function To_Timespec
(D
: Duration) return timespec
is
94 S
:= time_t
(Long_Long_Integer (D
));
95 F
:= D
- Duration (S
);
97 -- If F has negative value due to a round-up, adjust for positive F
105 return timespec
'(tv_sec => S,
106 tv_nsec => Long_Long_Integer (F * 10#1#E9));
109 end System.OS_Interface;