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Diffstat (limited to 'gcc-4.8.3/gcc/ada/s-osinte-android.adb')
-rw-r--r-- | gcc-4.8.3/gcc/ada/s-osinte-android.adb | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/s-osinte-android.adb b/gcc-4.8.3/gcc/ada/s-osinte-android.adb new file mode 100644 index 000000000..61e1a8a5f --- /dev/null +++ b/gcc-4.8.3/gcc/ada/s-osinte-android.adb @@ -0,0 +1,118 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS -- +-- -- +-- S Y S T E M . O S _ I N T E R F A C E -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1995-2012, AdaCore -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 3, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNARL was developed by the GNARL team at Florida State University. -- +-- Extensive contributions were provided by Ada Core Technologies, Inc. -- +-- -- +------------------------------------------------------------------------------ + +-- This is an Android version of this package. + +pragma Polling (Off); +-- Turn off polling, we do not want ATC polling to take place during +-- tasking operations. It causes infinite loops and other problems. + +-- This package encapsulates all direct interfaces to OS services +-- that are needed by children of System. + +with Interfaces.C; use Interfaces.C; +package body System.OS_Interface is + + ----------------- + -- To_Duration -- + ----------------- + + function To_Duration (TS : timespec) return Duration is + begin + return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9; + end To_Duration; + + ----------------- + -- To_Timespec -- + ----------------- + + function To_Timespec (D : Duration) return timespec is + S : time_t; + F : Duration; + + begin + S := time_t (Long_Long_Integer (D)); + F := D - Duration (S); + + -- If F has negative value due to a round-up, adjust for positive F + -- value. + + if F < 0.0 then + S := S - 1; + F := F + 1.0; + end if; + + return timespec'(tv_sec => S, + tv_nsec => long (Long_Long_Integer (F * 10#1#E9))); + end To_Timespec; + + ------------------- + -- clock_gettime -- + ------------------- + + function clock_gettime + (clock_id : clockid_t; + tp : access timespec) return int + is + pragma Unreferenced (clock_id); + + -- Android/Linux don't have clock_gettime, so use gettimeofday + + use Interfaces; + + type timeval is array (1 .. 2) of C.long; + + procedure timeval_to_duration + (T : not null access timeval; + sec : not null access C.long; + usec : not null access C.long); + pragma Import (C, timeval_to_duration, "__gnat_timeval_to_duration"); + + Micro : constant := 10**6; + sec : aliased C.long; + usec : aliased C.long; + TV : aliased timeval; + Result : int; + + function gettimeofday + (Tv : access timeval; + Tz : System.Address := System.Null_Address) return int; + pragma Import (C, gettimeofday, "gettimeofday"); + + begin + Result := gettimeofday (TV'Access, System.Null_Address); + pragma Assert (Result = 0); + timeval_to_duration (TV'Access, sec'Access, usec'Access); + tp.all := To_Timespec (Duration (sec) + Duration (usec) / Micro); + return Result; + end clock_gettime; + +end System.OS_Interface; |