| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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) 1998-2009, 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 uses gettimeofday and select |
| -- This file is suitable for Solaris (32 and 64 bits). |
| |
| 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_timeval is record |
| tv_sec : Long_Integer; |
| tv_usec : Long_Integer; |
| end record; |
| pragma Convention (C, struct_timeval); |
| |
| procedure gettimeofday |
| (tv : not null access struct_timeval; |
| tz : Address := Null_Address); |
| pragma Import (C, gettimeofday, "gettimeofday"); |
| |
| procedure C_select |
| (n : Integer := 0; |
| readfds, |
| writefds, |
| exceptfds : Address := Null_Address; |
| timeout : not null access struct_timeval); |
| pragma Import (C, C_select, "select"); |
| |
| ----------- |
| -- Clock -- |
| ----------- |
| |
| function Clock return Duration is |
| TV : aliased struct_timeval; |
| |
| begin |
| gettimeofday (TV'Access); |
| return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6; |
| end Clock; |
| |
| --------------------- |
| -- Monotonic_Clock -- |
| --------------------- |
| |
| function Monotonic_Clock return Duration renames Clock; |
| |
| ----------------- |
| -- Timed_Delay -- |
| ----------------- |
| |
| procedure Timed_Delay |
| (Time : Duration; |
| Mode : Integer) |
| is |
| Rel_Time : Duration; |
| Abs_Time : Duration; |
| Base_Time : constant Duration := Clock; |
| Check_Time : Duration := Base_Time; |
| timeval : aliased struct_timeval; |
| |
| 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 |
| timeval.tv_sec := Long_Integer (Rel_Time); |
| |
| if Duration (timeval.tv_sec) > Rel_Time then |
| timeval.tv_sec := timeval.tv_sec - 1; |
| end if; |
| |
| timeval.tv_usec := |
| Long_Integer ((Rel_Time - Duration (timeval.tv_sec)) * 10#1#E6); |
| |
| C_select (timeout => timeval'Unchecked_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; |
