Implement -mmemcpy-strategy= and -mmemset-strategy= options
[official-gcc.git] / gcc / ada / s-osinte-android.adb
blob61e1a8a5fc2ca08c6574e396ff2364470ecf7563
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) 1995-2012, 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 ------------------------------------------------------------------------------
32 -- This is an Android version of this package.
34 pragma 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.
38 -- This package encapsulates all direct interfaces to OS services
39 -- that are needed by children of System.
41 with Interfaces.C; use Interfaces.C;
42 package body System.OS_Interface is
44 -----------------
45 -- To_Duration --
46 -----------------
48 function To_Duration (TS : timespec) return Duration is
49 begin
50 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
51 end To_Duration;
53 -----------------
54 -- To_Timespec --
55 -----------------
57 function To_Timespec (D : Duration) return timespec is
58 S : time_t;
59 F : Duration;
61 begin
62 S := time_t (Long_Long_Integer (D));
63 F := D - Duration (S);
65 -- If F has negative value due to a round-up, adjust for positive F
66 -- value.
68 if F < 0.0 then
69 S := S - 1;
70 F := F + 1.0;
71 end if;
73 return timespec'(tv_sec => S,
74 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
75 end To_Timespec;
77 -------------------
78 -- clock_gettime --
79 -------------------
81 function clock_gettime
82 (clock_id : clockid_t;
83 tp : access timespec) return int
85 pragma Unreferenced (clock_id);
87 -- Android/Linux don't have clock_gettime, so use gettimeofday
89 use Interfaces;
91 type timeval is array (1 .. 2) of C.long;
93 procedure timeval_to_duration
94 (T : not null access timeval;
95 sec : not null access C.long;
96 usec : not null access C.long);
97 pragma Import (C, timeval_to_duration, "__gnat_timeval_to_duration");
99 Micro : constant := 10**6;
100 sec : aliased C.long;
101 usec : aliased C.long;
102 TV : aliased timeval;
103 Result : int;
105 function gettimeofday
106 (Tv : access timeval;
107 Tz : System.Address := System.Null_Address) return int;
108 pragma Import (C, gettimeofday, "gettimeofday");
110 begin
111 Result := gettimeofday (TV'Access, System.Null_Address);
112 pragma Assert (Result = 0);
113 timeval_to_duration (TV'Access, sec'Access, usec'Access);
114 tp.all := To_Timespec (Duration (sec) + Duration (usec) / Micro);
115 return Result;
116 end clock_gettime;
118 end System.OS_Interface;