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) 2001-2010, AdaCore                     --
10--                                                                          --
11-- GNAT 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.                                     --
17--                                                                          --
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.               --
21--                                                                          --
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/>.                                          --
26--                                                                          --
27-- GNARL was developed by the GNARL team at Florida State University.       --
28-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
29--                                                                          --
30------------------------------------------------------------------------------
31
32--  This is a LynxOS (POSIX Threads) version of this package
33
34pragma Polling (Off);
35--  Turn off polling, we do not want ATC polling to take place during
36--  tasking operations. It causes infinite loops and other problems.
37
38package body System.OS_Interface is
39
40   use Interfaces.C;
41
42   -----------------
43   -- To_Duration --
44   -----------------
45
46   function To_Duration (TS : timespec) return Duration is
47   begin
48      return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
49   end To_Duration;
50
51   -----------------
52   -- To_Timespec --
53   -----------------
54
55   function To_Timespec (D : Duration) return timespec is
56      S : time_t;
57      F : Duration;
58
59   begin
60      S := time_t (Long_Long_Integer (D));
61      F := D - Duration (S);
62
63      --  If F has negative value due to a round-up, adjust for positive F
64      --  value.
65
66      if F < 0.0 then
67         S := S - 1;
68         F := F + 1.0;
69      end if;
70
71      return timespec'(tv_sec => S,
72                       tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
73   end To_Timespec;
74
75   -------------
76   -- sigwait --
77   -------------
78
79   function sigwait
80     (set :  access sigset_t;
81      sig :  access Signal)
82      return int
83   is
84      function sigwaitinfo
85        (set   : access sigset_t;
86         info  : System.Address) return Signal;
87      pragma Import (C, sigwaitinfo, "sigwaitinfo");
88
89   begin
90      sig.all := sigwaitinfo (set, Null_Address);
91
92      if sig.all = -1 then
93         return errno;
94      end if;
95
96      return 0;
97   end sigwait;
98
99   --------------------
100   -- Get_Stack_Base --
101   --------------------
102
103   function Get_Stack_Base (thread : pthread_t) return Address is
104      pragma Warnings (Off, thread);
105
106   begin
107      return Null_Address;
108   end Get_Stack_Base;
109
110   ------------------
111   -- pthread_init --
112   ------------------
113
114   procedure pthread_init is
115   begin
116      null;
117   end pthread_init;
118
119end System.OS_Interface;
120