1------------------------------------------------------------------------------
2--                                                                          --
3--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
4--                                                                          --
5--                   S Y S T E M . O S _ I N T E R F A C E                  --
6--                                                                          --
7--                                   B o d y                                --
8--                                                                          --
9--             Copyright (C) 1991-2017, Florida State University            --
10--                     Copyright (C) 1995-2021, AdaCore                     --
11--                                                                          --
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.                                     --
18--                                                                          --
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.               --
22--                                                                          --
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/>.                                          --
27--                                                                          --
28-- GNARL was developed by the GNARL team at Florida State University.       --
29-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
30--                                                                          --
31------------------------------------------------------------------------------
32
33--  This version is for Linux/x32
34
35--  This package encapsulates all direct interfaces to OS services
36--  that are needed by children of System.
37
38with Interfaces.C; use Interfaces.C;
39
40package body System.OS_Interface is
41
42   --------------------
43   -- Get_Stack_Base --
44   --------------------
45
46   function Get_Stack_Base (thread : pthread_t) return Address is
47      pragma Warnings (Off, thread);
48
49   begin
50      return Null_Address;
51   end Get_Stack_Base;
52
53   ------------------
54   -- pthread_init --
55   ------------------
56
57   procedure pthread_init is
58   begin
59      null;
60   end pthread_init;
61
62   -----------------
63   -- To_Duration --
64   -----------------
65
66   function To_Duration (TS : timespec) return Duration is
67   begin
68      return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
69   end To_Duration;
70
71   ------------------------
72   -- To_Target_Priority --
73   ------------------------
74
75   function To_Target_Priority
76     (Prio : System.Any_Priority) return Interfaces.C.int
77   is
78   begin
79      return Interfaces.C.int (Prio);
80   end To_Target_Priority;
81
82   -----------------
83   -- To_Timespec --
84   -----------------
85
86   function To_Timespec (D : Duration) return timespec is
87      S : time_t;
88      F : Duration;
89
90   begin
91      S := time_t (Long_Long_Integer (D));
92      F := D - Duration (S);
93
94      --  If F has negative value due to a round-up, adjust for positive F
95      --  value.
96
97      if F < 0.0 then
98         S := S - 1;
99         F := F + 1.0;
100      end if;
101
102      return timespec'(tv_sec => S,
103                       tv_nsec => Long_Long_Integer (F * 10#1#E9));
104   end To_Timespec;
105
106end System.OS_Interface;
107