PR target/58115
[official-gcc.git] / gcc / ada / s-osinte-posix.adb
blob402ddcb61908078d285279be7120e069321fa5da
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) 1991-1994, Florida State University --
10 -- Copyright (C) 1995-2010, 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 ------------------------------------------------------------------------------
33 -- This is a GNU/LinuxThreads, Solaris pthread and HP-UX pthread version
34 -- of this package.
36 pragma 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.
40 -- This package encapsulates all direct interfaces to OS services
41 -- that are needed by children of System.
43 with Interfaces.C; use Interfaces.C;
44 package body System.OS_Interface is
46 --------------------
47 -- Get_Stack_Base --
48 --------------------
50 function Get_Stack_Base (thread : pthread_t) return Address is
51 pragma Warnings (Off, thread);
53 begin
54 return Null_Address;
55 end Get_Stack_Base;
57 ------------------
58 -- pthread_init --
59 ------------------
61 procedure pthread_init is
62 begin
63 null;
64 end pthread_init;
66 -----------------
67 -- To_Duration --
68 -----------------
70 function To_Duration (TS : timespec) return Duration is
71 begin
72 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
73 end To_Duration;
75 ------------------------
76 -- To_Target_Priority --
77 ------------------------
79 function To_Target_Priority
80 (Prio : System.Any_Priority) return Interfaces.C.int
82 begin
83 return Interfaces.C.int (Prio);
84 end To_Target_Priority;
86 -----------------
87 -- To_Timespec --
88 -----------------
90 function To_Timespec (D : Duration) return timespec is
91 S : time_t;
92 F : Duration;
94 begin
95 S := time_t (Long_Long_Integer (D));
96 F := D - Duration (S);
98 -- If F has negative value due to a round-up, adjust for positive F
99 -- value.
101 if F < 0.0 then
102 S := S - 1;
103 F := F + 1.0;
104 end if;
106 return timespec'(tv_sec => S,
107 tv_nsec => time_t (Long_Long_Integer (F * 10#1#E9)));
108 end To_Timespec;
110 end System.OS_Interface;