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) 2015-2016, Free Software Foundation, Inc.         --
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 the GNU/Hurd 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
38--  This package encapsulates all direct interfaces to OS services
39--  that are needed by children of System.
40
41package body System.OS_Interface is
42
43   --------------------
44   -- Get_Stack_Base --
45   --------------------
46
47   function Get_Stack_Base (thread : pthread_t) return Address is
48      pragma Warnings (Off, thread);
49
50   begin
51      return Null_Address;
52   end Get_Stack_Base;
53
54   ------------------
55   -- pthread_init --
56   ------------------
57
58   procedure pthread_init is
59   begin
60      null;
61   end pthread_init;
62
63   --------------------------------------
64   -- pthread_mutexattr_setprioceiling --
65   --------------------------------------
66
67   function pthread_mutexattr_setprioceiling
68     (attr     : access pthread_mutexattr_t;
69      prioceiling : int) return int is
70      pragma Unreferenced (attr, prioceiling);
71   begin
72      return 0;
73   end pthread_mutexattr_setprioceiling;
74
75   --------------------------------------
76   -- pthread_mutexattr_getprioceiling --
77   --------------------------------------
78
79   function pthread_mutexattr_getprioceiling
80     (attr     : access pthread_mutexattr_t;
81      prioceiling : access int) return int is
82      pragma Unreferenced (attr, prioceiling);
83   begin
84      return 0;
85   end pthread_mutexattr_getprioceiling;
86
87   ---------------------------
88   -- pthread_setschedparam --
89   ---------------------------
90
91   function pthread_setschedparam
92     (thread : pthread_t;
93      policy : int;
94      param : access struct_sched_param) return int is
95      pragma Unreferenced (thread, policy, param);
96   begin
97      return 0;
98   end pthread_setschedparam;
99
100   -----------------
101   -- To_Duration --
102   -----------------
103
104   function To_Duration (TS : timespec) return Duration is
105   begin
106      return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
107   end To_Duration;
108
109   ------------------------
110   -- To_Target_Priority --
111   ------------------------
112
113   function To_Target_Priority
114     (Prio : System.Any_Priority) return Interfaces.C.int
115   is
116   begin
117      return Interfaces.C.int (Prio);
118   end To_Target_Priority;
119
120   -----------------
121   -- To_Timespec --
122   -----------------
123
124   function To_Timespec (D : Duration) return timespec is
125      S : time_t;
126      F : Duration;
127
128   begin
129      S := time_t (Long_Long_Integer (D));
130      F := D - Duration (S);
131
132      --  If F has negative value due to a round-up, adjust for positive F
133      --  value.
134
135      if F < 0.0 then
136         S := S - 1;
137         F := F + 1.0;
138      end if;
139
140      return timespec'(tv_sec => S,
141                       tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
142   end To_Timespec;
143
144end System.OS_Interface;
145