gcc/ada/5sosinte.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
   4 --                                                                          --
   5 --                   S Y S T E M . O S _ I N T E R F A C E                  --
   6 --                                                                          --
   7 --                                  B o d y                                 --
   8 --                                                                          --
   9 --                                                                          --
  10 --             Copyright (C) 1991-2001 Florida State University             --
  11 --                                                                          --
  12 -- GNARL is free software; you can  redistribute it  and/or modify it under --
  13 -- terms of the  GNU General Public License as published  by the Free Soft- --
  14 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  15 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
  16 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  17 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNARL was developed by the GNARL team at Florida State University. It is --
  31 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
  32 -- State University (http://www.gnat.com).                                  --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 --  This is a Solaris version of this package.
  37
  38 --  This package encapsulates all direct interfaces to OS services
  39 --  that are needed by children of System.
  40
  41 pragma Polling (Off);
  42 --  Turn off polling, we do not want ATC polling to take place during
  43 --  tasking operations. It causes infinite loops and other problems.
  44
  45 with Interfaces.C; use Interfaces.C;
  46 package body System.OS_Interface is
  47
  48    -----------------
  49    -- To_Duration --
  50    -----------------
  51
  52    function To_Duration (TS : timespec) return Duration is
  53    begin
  54       return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
  55    end To_Duration;
  56
  57    -----------------
  58    -- To_Timespec --
  59    -----------------
  60
  61    function To_Timespec (D : Duration) return timespec is
  62       S : time_t;
  63       F : Duration;
  64    begin
  65       S := time_t (Long_Long_Integer (D));
  66       F := D - Duration (S);
  67
  68       --  If F has negative value due to a round-up, adjust for positive F
  69       --  value.
  70       if F < 0.0 then S := S - 1; F := F + 1.0; end if;
  71       return timespec' (tv_sec => S,
  72         tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
  73    end To_Timespec;
  74
  75    function To_Duration (TV : struct_timeval) return Duration is
  76    begin
  77       return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
  78    end To_Duration;
  79
  80    function To_Timeval (D : Duration) return struct_timeval is
  81       S : long;
  82       F : Duration;
  83    begin
  84       S := long (Long_Long_Integer (D));
  85       F := D - Duration (S);
  86
  87       --  If F has negative value due to a round-up, adjust for positive F
  88       --  value.
  89       if F < 0.0 then S := S - 1; F := F + 1.0; end if;
  90       return struct_timeval' (tv_sec => S,
  91         tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
  92    end To_Timeval;
  93
  94    procedure pthread_init is
  95    begin
  96       null;
  97    end pthread_init;
  98
  99 end System.OS_Interface;