+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNU ADA 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 --
--- --
--- $Revision: 1.1.16.1 $
--- --
--- Copyright (C) 1998-2001 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 2, or (at your option) any later ver- --
--- sion. GNARL 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. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNARL; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- 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
--- Currently OpenNT, Dec Unix, Solaris and SCO UnixWare use this file.
-
-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 struct_timeval is record
- tv_sec : Integer;
- tv_usec : Integer;
- end record;
- pragma Convention (C, struct_timeval);
-
- function gettimeofday
- (tv : access struct_timeval;
- tz : struct_timezone_ptr) return Integer;
- pragma Import (C, gettimeofday, "gettimeofday");
-
- type fd_set is null record;
- type fd_set_ptr is access all fd_set;
-
- function C_select
- (n : Integer := 0;
- readfds,
- writefds,
- exceptfds : fd_set_ptr := null;
- timeout : access struct_timeval) return Integer;
- pragma Import (C, C_select, "select");
-
- -----------
- -- Clock --
- -----------
-
- function Clock return Duration is
- TV : aliased struct_timeval;
- Result : Integer;
-
- 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;
-
- -----------------
- -- Timed_Delay --
- -----------------
-
- procedure Timed_Delay
- (Time : Duration;
- Mode : Integer)
- is
- Result : Integer;
- Rel_Time : Duration;
- Abs_Time : Duration;
- Check_Time : Duration := Clock;
- 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 := Integer (Rel_Time);
-
- if Duration (timeval.tv_sec) > Rel_Time then
- timeval.tv_sec := timeval.tv_sec - 1;
- end if;
-
- timeval.tv_usec :=
- Integer ((Rel_Time - Duration (timeval.tv_sec)) * 10#1#E6);
-
- Result := C_select (timeout => timeval'Unchecked_Access);
- Check_Time := Clock;
-
- exit when Abs_Time <= Check_Time;
-
- Rel_Time := Abs_Time - Check_Time;
- end loop;
- end if;
- end Timed_Delay;
-
-end System.OS_Primitives;
projects / msp430-gcc.git / blobdiff