| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT RUN-TIME COMPONENTS -- |
| -- -- |
| -- S Y S T E M . R A N D O M _ S E E D -- |
| -- -- |
| -- B o d y -- |
| -- -- |
| -- Copyright (C) 2011-2012, Free Software Foundation, Inc. -- |
| -- -- |
| -- 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/>. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- Version used on all systems except Ravenscar where Calendar is unavailable |
| |
| with Ada.Calendar; use Ada.Calendar; |
| with Ada.Unchecked_Conversion; |
| |
| package body System.Random_Seed is |
| |
| Y2K : constant Time := |
| Time_Of (Year => 2000, Month => 1, Day => 1, Seconds => 0.0); |
| -- First day of Year 2000, to get a duration |
| |
| function To_U64 is |
| new Ada.Unchecked_Conversion (Duration, Interfaces.Unsigned_64); |
| |
| -------------- |
| -- Get_Seed -- |
| -------------- |
| |
| function Get_Seed return Interfaces.Unsigned_64 is |
| begin |
| return To_U64 (Clock - Y2K); |
| end Get_Seed; |
| |
| end System.Random_Seed; |
