gcc/ada/libgnarl/s-osinte__solaris.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT 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) 1991-2017, Florida State University            --
  10 --                     Copyright (C) 1995-2024, AdaCore                     --
  11 --                                                                          --
  12 -- GNAT 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 3,  or (at your option) any later ver- --
  15 -- sion.  GNAT 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.                                     --
  18 --                                                                          --
  19 -- As a special exception under Section 7 of GPL version 3, you are granted --
  20 -- additional permissions described in the GCC Runtime Library Exception,   --
  21 -- version 3.1, as published by the Free Software Foundation.               --
  22 --                                                                          --
  23 -- You should have received a copy of the GNU General Public License and    --
  24 -- a copy of the GCC Runtime Library Exception along with this program;     --
  25 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  26 -- <http://www.gnu.org/licenses/>.                                          --
  27 --                                                                          --
  28 -- GNARL was developed by the GNARL team at Florida State University.       --
  29 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  30 --                                                                          --
  31 ------------------------------------------------------------------------------
  32
  33 --  This is a Solaris version of this package
  34
  35 --  This package encapsulates all direct interfaces to OS services
  36 --  that are needed by children of System.
  37
  38 with Interfaces.C; use Interfaces.C;
  39
  40 package body System.OS_Interface is
  41
  42    -----------------
  43    -- To_Duration --
  44    -----------------
  45
  46    function To_Duration (TS : timespec) return Duration is
  47    begin
  48       return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
  49    end To_Duration;
  50
  51    -----------------
  52    -- To_Timespec --
  53    -----------------
  54
  55    function To_Timespec (D : Duration) return timespec is
  56       S : time_t;
  57       F : Duration;
  58
  59    begin
  60       S := time_t (Long_Long_Integer (D));
  61       F := D - Duration (S);
  62
  63       --  If F has negative value due to a round-up, adjust for positive F
  64
  65       if F < 0.0 then
  66          S := S - 1;
  67          F := F + 1.0;
  68       end if;
  69
  70       return timespec'(tv_sec  => S,
  71                        tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
  72    end To_Timespec;
  73
  74    ------------------
  75    -- pthread_init --
  76    ------------------
  77
  78    procedure pthread_init is
  79    begin
  80       null;
  81    end pthread_init;
  82
  83 end System.OS_Interface;