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 --             Copyright (C) 1991-1994, Florida State University            --
  10 --             Copyright (C) 1995-2003, Ada Core Technologies               --
  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.       --
  31 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This is a Solaris version of this package.
  36
  37 --  This package encapsulates all direct interfaces to OS services
  38 --  that are needed by children of System.
  39
  40 pragma Polling (Off);
  41 --  Turn off polling, we do not want ATC polling to take place during
  42 --  tasking operations. It causes infinite loops and other problems.
  43
  44 with Interfaces.C; use Interfaces.C;
  45 package body System.OS_Interface is
  46
  47    -----------------
  48    -- To_Duration --
  49    -----------------
  50
  51    function To_Duration (TS : timespec) return Duration is
  52    begin
  53       return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
  54    end To_Duration;
  55
  56    -----------------
  57    -- To_Timespec --
  58    -----------------
  59
  60    function To_Timespec (D : Duration) return timespec is
  61       S : time_t;
  62       F : Duration;
  63    begin
  64       S := time_t (Long_Long_Integer (D));
  65       F := D - Duration (S);
  66
  67       --  If F has negative value due to a round-up, adjust for positive F
  68       --  value.
  69       if F < 0.0 then S := S - 1; F := F + 1.0; end if;
  70       return timespec'(tv_sec  => S,
  71                        tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
  72    end To_Timespec;
  73
  74    function To_Duration (TV : struct_timeval) return Duration is
  75    begin
  76       return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
  77    end To_Duration;
  78
  79    function To_Timeval (D : Duration) return struct_timeval is
  80       S : long;
  81       F : Duration;
  82    begin
  83       S := long (Long_Long_Integer (D));
  84       F := D - Duration (S);
  85
  86       --  If F has negative value due to a round-up, adjust for positive F
  87       --  value.
  88       if F < 0.0 then S := S - 1; F := F + 1.0; end if;
  89       return
  90         struct_timeval'
  91           (tv_sec  => S,
  92            tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
  93    end To_Timeval;
  94
  95    procedure pthread_init is
  96    begin
  97       null;
  98    end pthread_init;
  99
 100 end System.OS_Interface;