--- /dev/null
+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
+-- --
+-- S Y S T E M . O S _ P R I M I T I V E S --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 1998-2008, Free Software Foundation, Inc. --
+-- --
+-- GNARL 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 version is for darwin
+
+package body System.OS_Primitives is
+
+ -- ??? These definitions are duplicated from System.OS_Interface
+ -- because we don't want to depend on any package. Consider removing
+ -- these declarations in System.OS_Interface and move these ones in
+ -- the spec.
+
+ type struct_timezone is record
+ tz_minuteswest : Integer;
+ tz_dsttime : Integer;
+ end record;
+ pragma Convention (C, struct_timezone);
+ type struct_timezone_ptr is access all struct_timezone;
+
+ type time_t is new Long_Integer;
+
+ type struct_timeval is record
+ tv_sec : time_t;
+ tv_usec : Integer;
+ end record;
+ pragma Convention (C, struct_timeval);
+
+ function gettimeofday
+ (tv : not null access struct_timeval;
+ tz : struct_timezone_ptr) return Integer;
+ pragma Import (C, gettimeofday, "gettimeofday");
+
+ type timespec is record
+ tv_sec : time_t;
+ tv_nsec : Long_Integer;
+ end record;
+ pragma Convention (C, timespec);
+
+ function nanosleep (rqtp, rmtp : not null access timespec) return Integer;
+ pragma Import (C, nanosleep, "nanosleep");
+
+ -----------
+ -- Clock --
+ -----------
+
+ function Clock return Duration is
+ TV : aliased struct_timeval;
+
+ Result : Integer;
+ pragma Unreferenced (Result);
+
+ begin
+ Result := gettimeofday (TV'Access, null);
+ return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
+ end Clock;
+
+ ---------------------
+ -- Monotonic_Clock --
+ ---------------------
+
+ function Monotonic_Clock return Duration renames Clock;
+
+ -----------------
+ -- To_Timespec --
+ -----------------
+
+ function To_Timespec (D : Duration) return 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_Integer (Long_Long_Integer (F * 10#1#E9)));
+ end To_Timespec;
+
+ -----------------
+ -- Timed_Delay --
+ -----------------
+
+ procedure Timed_Delay
+ (Time : Duration;
+ Mode : Integer)
+ is
+ Request : aliased timespec;
+ Remaind : aliased timespec;
+ Rel_Time : Duration;
+ Abs_Time : Duration;
+ Base_Time : constant Duration := Clock;
+ Check_Time : Duration := Base_Time;
+
+ Result : Integer;
+ pragma Unreferenced (Result);
+
+ begin
+ if Mode = Relative then
+ Rel_Time := Time;
+ Abs_Time := Time + Check_Time;
+ else
+ Rel_Time := Time - Check_Time;
+ Abs_Time := Time;
+ end if;
+
+ if Rel_Time > 0.0 then
+ loop
+ Request := To_Timespec (Rel_Time);
+ Result := nanosleep (Request'Access, Remaind'Access);
+ Check_Time := Clock;
+
+ exit when Abs_Time <= Check_Time or else Check_Time < Base_Time;
+
+ Rel_Time := Abs_Time - Check_Time;
+ end loop;
+ end if;
+ end Timed_Delay;
+
+ ----------------
+ -- Initialize --
+ ----------------
+
+ procedure Initialize is
+ begin
+ null;
+ end Initialize;
+
+end System.OS_Primitives;
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