gcc/ada/libgnarl/s-tasinf__solaris.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                     S Y S T E M . T A S K _ I N F O                      --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2023, 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 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This package body contains the routines associated with the implementation
  33 --  of the Task_Info pragma.
  34
  35 --  This is the Solaris (native) version of this module
  36
  37 package body System.Task_Info is
  38
  39    -----------------------------
  40    -- Bound_Thread_Attributes --
  41    -----------------------------
  42
  43    function Bound_Thread_Attributes return Thread_Attributes is
  44    begin
  45       return (False, True);
  46    end Bound_Thread_Attributes;
  47
  48    function Bound_Thread_Attributes (CPU : CPU_Number)
  49       return Thread_Attributes is
  50    begin
  51       return (True, True, CPU);
  52    end Bound_Thread_Attributes;
  53
  54    ---------------------------------
  55    -- New_Bound_Thread_Attributes --
  56    ---------------------------------
  57
  58    function New_Bound_Thread_Attributes return Task_Info_Type is
  59    begin
  60       return new Thread_Attributes'(False, True);
  61    end New_Bound_Thread_Attributes;
  62
  63    function New_Bound_Thread_Attributes (CPU : CPU_Number)
  64       return Task_Info_Type is
  65    begin
  66       return new Thread_Attributes'(True, True, CPU);
  67    end New_Bound_Thread_Attributes;
  68
  69    -----------------------------------
  70    -- New_Unbound_Thread_Attributes --
  71    -----------------------------------
  72
  73    function New_Unbound_Thread_Attributes return Task_Info_Type is
  74    begin
  75       return new Thread_Attributes'(False, False);
  76    end New_Unbound_Thread_Attributes;
  77
  78    -------------------------------
  79    -- Unbound_Thread_Attributes --
  80    -------------------------------
  81
  82    function Unbound_Thread_Attributes return Thread_Attributes is
  83    begin
  84       return (False, False);
  85    end Unbound_Thread_Attributes;
  86
  87    N_CPU : Natural := 0;
  88    pragma Atomic (N_CPU);
  89    --  Cache CPU number. Use pragma Atomic to avoid a race condition when
  90    --  setting N_CPU in Number_Of_Processors below.
  91
  92    --------------------------
  93    -- Number_Of_Processors --
  94    --------------------------
  95
  96    function Number_Of_Processors return Positive is
  97    begin
  98       if N_CPU = 0 then
  99          N_CPU := Natural
 100            (OS_Interface.sysconf (OS_Interface.SC_NPROCESSORS_ONLN));
 101       end if;
 102
 103       return N_CPU;
 104    end Number_Of_Processors;
 105
 106 end System.Task_Info;