gcc/ada/libgnarl/s-osinte__gnu.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) 2015-2024, Free Software Foundation, Inc.         --
  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 the GNU/Hurd version of this package.
  33
  34 --  This package encapsulates all direct interfaces to OS services
  35 --  that are needed by children of System.
  36
  37 package body System.OS_Interface is
  38
  39    --------------------
  40    -- Get_Stack_Base --
  41    --------------------
  42
  43    function Get_Stack_Base (thread : pthread_t) return Address is
  44       pragma Warnings (Off, thread);
  45
  46    begin
  47       return Null_Address;
  48    end Get_Stack_Base;
  49
  50    ------------------
  51    -- pthread_init --
  52    ------------------
  53
  54    procedure pthread_init is
  55    begin
  56       null;
  57    end pthread_init;
  58
  59    --------------------------------------
  60    -- pthread_mutexattr_setprioceiling --
  61    --------------------------------------
  62
  63    function pthread_mutexattr_setprioceiling
  64      (attr     : access pthread_mutexattr_t;
  65       prioceiling : int) return int is
  66       pragma Unreferenced (attr, prioceiling);
  67    begin
  68       return 0;
  69    end pthread_mutexattr_setprioceiling;
  70
  71    --------------------------------------
  72    -- pthread_mutexattr_getprioceiling --
  73    --------------------------------------
  74
  75    function pthread_mutexattr_getprioceiling
  76      (attr     : access pthread_mutexattr_t;
  77       prioceiling : access int) return int is
  78       pragma Unreferenced (attr, prioceiling);
  79    begin
  80       return 0;
  81    end pthread_mutexattr_getprioceiling;
  82
  83    ---------------------------
  84    -- pthread_setschedparam --
  85    ---------------------------
  86
  87    function pthread_setschedparam
  88      (thread : pthread_t;
  89       policy : int;
  90       param : access struct_sched_param) return int is
  91       pragma Unreferenced (thread, policy, param);
  92    begin
  93       return 0;
  94    end pthread_setschedparam;
  95
  96    -----------------
  97    -- To_Duration --
  98    -----------------
  99
 100    function To_Duration (TS : timespec) return Duration is
 101    begin
 102       return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
 103    end To_Duration;
 104
 105    ------------------------
 106    -- To_Target_Priority --
 107    ------------------------
 108
 109    function To_Target_Priority
 110      (Prio : System.Any_Priority) return Interfaces.C.int
 111    is
 112    begin
 113       return Interfaces.C.int (Prio);
 114    end To_Target_Priority;
 115
 116    -----------------
 117    -- To_Timespec --
 118    -----------------
 119
 120    function To_Timespec (D : Duration) return timespec is
 121       S : time_t;
 122       F : Duration;
 123
 124    begin
 125       S := time_t (Long_Long_Integer (D));
 126       F := D - Duration (S);
 127
 128       --  If F has negative value due to a round-up, adjust for positive F
 129       --  value.
 130
 131       if F < 0.0 then
 132          S := S - 1;
 133          F := F + 1.0;
 134       end if;
 135
 136       return timespec'(tv_sec => S,
 137                        tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
 138    end To_Timespec;
 139
 140 end System.OS_Interface;