1------------------------------------------------------------------------------
2--                                                                          --
3--                GNU ADA 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) 1999-2002 Free Software Foundation, Inc.         --
10--                                                                          --
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.                                                      --
21--                                                                          --
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.                                      --
28--                                                                          --
29-- GNARL was developed by the GNARL team at Florida State University.       --
30-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
31--                                                                          --
32------------------------------------------------------------------------------
33
34--  This is a UnixWare (Native) version of this package
35
36pragma Polling (Off);
37--  Turn off polling, we do not want ATC polling to take place during
38--  tasking operations. It causes infinite loops and other problems.
39
40with Interfaces.C;
41
42package body System.OS_Interface is
43
44   use Interfaces.C;
45
46   -----------------
47   -- To_Duration --
48   -----------------
49
50   function To_Duration (TS : timespec) return Duration is
51   begin
52      return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
53   end To_Duration;
54
55   function To_Duration (TV : struct_timeval) return Duration is
56   begin
57      return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
58   end To_Duration;
59
60   -----------------
61   -- To_Timespec --
62   -----------------
63
64   function To_Timespec (D : Duration) return timespec is
65      S : time_t;
66      F : Duration;
67
68   begin
69      S := time_t (Long_Long_Integer (D));
70      F := D - Duration (S);
71
72      --  If F has negative value due to a round-up, adjust for positive F
73      --  value.
74
75      if F < 0.0 then
76         S := S - 1;
77         F := F + 1.0;
78      end if;
79
80      return timespec'(tv_sec => S,
81                       tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
82   end To_Timespec;
83
84   ----------------
85   -- To_Timeval --
86   ----------------
87
88   function To_Timeval (D : Duration) return struct_timeval is
89      S : long;
90      F : Duration;
91
92   begin
93      S := long (Long_Long_Integer (D));
94      F := D - Duration (S);
95
96      --  If F has negative value due to a round-up, adjust for positive F
97      --  value.
98
99      if F < 0.0 then
100         S := S - 1;
101         F := F + 1.0;
102      end if;
103
104      return
105        struct_timeval'
106          (tv_sec => S,
107           tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
108   end To_Timeval;
109
110   -------------------
111   -- clock_gettime --
112   -------------------
113
114   function clock_gettime
115     (clock_id : clockid_t;
116      tp       : access timespec)
117      return     int
118   is
119      pragma Warnings (Off, clock_id);
120
121      Result : int;
122      tv     : aliased struct_timeval;
123
124      function gettimeofday
125        (tv   : access struct_timeval;
126         tz   : System.Address := System.Null_Address)
127         return int;
128      pragma Import (C, gettimeofday, "gettimeofday");
129
130   begin
131      Result := gettimeofday (tv'Unchecked_Access);
132      tp.all := To_Timespec (To_Duration (tv));
133      return Result;
134   end clock_gettime;
135
136   ---------------------------
137   --  POSIX.1c  Section 3  --
138   ---------------------------
139
140   function sigwait (set : access sigset_t; sig : access Signal) return int is
141      Result : int;
142
143      function sigwait (set : access sigset_t) return int;
144      pragma Import (C, sigwait, "sigwait");
145
146   begin
147      Result := sigwait (set);
148
149      if Result < 0 then
150         sig.all := 0;
151         return errno;
152      end if;
153
154      sig.all := Signal (Result);
155      return 0;
156   end sigwait;
157
158   function pthread_kill (thread : pthread_t; sig : Signal) return int is
159      function pthread_kill_base
160        (thread : access pthread_t; sig : access Signal) return int;
161      pragma Import (C, pthread_kill_base, "pthread_kill");
162
163      thr   : aliased pthread_t := thread;
164      signo : aliased Signal := sig;
165
166   begin
167      return pthread_kill_base (thr'Unchecked_Access, signo'Unchecked_Access);
168   end pthread_kill;
169
170   function Get_Stack_Base (thread : pthread_t) return Address is
171      pragma Warnings (Off, thread);
172
173   begin
174      return Null_Address;
175   end Get_Stack_Base;
176
177   procedure pthread_init is
178   begin
179      null;
180   end pthread_init;
181
182end System.OS_Interface;
183