gcc/ada/s-osinte-lynxos.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) 2001-2010, AdaCore                     --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNARL was developed by the GNARL team at Florida State University.       --
  28 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This is a LynxOS (POSIX Threads) version of this package
  33
  34 pragma Polling (Off);
  35 --  Turn off polling, we do not want ATC polling to take place during
  36 --  tasking operations. It causes infinite loops and other problems.
  37
  38 package body System.OS_Interface is
  39
  40    use Interfaces.C;
  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       --  value.
  65
  66       if F < 0.0 then
  67          S := S - 1;
  68          F := F + 1.0;
  69       end if;
  70
  71       return timespec'(tv_sec => S,
  72                        tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
  73    end To_Timespec;
  74
  75    -------------
  76    -- sigwait --
  77    -------------
  78
  79    function sigwait
  80      (set :  access sigset_t;
  81       sig :  access Signal)
  82       return int
  83    is
  84       function sigwaitinfo
  85         (set   : access sigset_t;
  86          info  : System.Address) return Signal;
  87       pragma Import (C, sigwaitinfo, "sigwaitinfo");
  88
  89    begin
  90       sig.all := sigwaitinfo (set, Null_Address);
  91
  92       if sig.all = -1 then
  93          return errno;
  94       end if;
  95
  96       return 0;
  97    end sigwait;
  98
  99    --------------------
 100    -- Get_Stack_Base --
 101    --------------------
 102
 103    function Get_Stack_Base (thread : pthread_t) return Address is
 104       pragma Warnings (Off, thread);
 105
 106    begin
 107       return Null_Address;
 108    end Get_Stack_Base;
 109
 110    ------------------
 111    -- pthread_init --
 112    ------------------
 113
 114    procedure pthread_init is
 115    begin
 116       null;
 117    end pthread_init;
 118
 119 end System.OS_Interface;