gcc/ada/s-intman-vms.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
   4 --                                                                          --
   5 --           S Y S T E M . I N T E R R U P T _ M A N A G E M E N T          --
   6 --                                                                          --
   7 --                                  B o d y                                 --
   8 --                                                                          --
   9 --         Copyright (C) 1992-2006, Free Software Foundation, Inc.          --
  10 --                                                                          --
  11 -- GNARL 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 2,  or (at your option) any later ver- --
  14 -- sion. GNARL 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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
  26 -- however invalidate  any other reasons why  the executable file  might be --
  27 -- covered by the  GNU Public License.                                      --
  28 --                                                                          --
  29 -- GNARL was developed by the GNARL team at Florida State University.       --
  30 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  This is a OpenVMS/Alpha version of this package.
  35
  36 package body System.Interrupt_Management is
  37
  38    ----------------
  39    -- Initialize --
  40    ----------------
  41
  42    Initialized : Boolean := False;
  43
  44    procedure Initialize is
  45       use System.OS_Interface;
  46       use type unsigned_long;
  47       Status : Cond_Value_Type;
  48
  49    begin
  50       if Initialized then
  51          return;
  52       end if;
  53
  54       Initialized := True;
  55       Abort_Task_Interrupt := Interrupt_ID_0;
  56       --  Unused
  57
  58       Reserve := Reserve or Keep_Unmasked or Keep_Masked;
  59       Reserve (Interrupt_ID_0) := True;
  60
  61       Sys_Crembx
  62         (Status => Status,
  63          Prmflg => False,
  64          Chan   => Rcv_Interrupt_Chan,
  65          Maxmsg => Interrupt_ID'Size,
  66          Bufquo => Interrupt_Bufquo,
  67          Lognam => "GNAT_Interrupt_Mailbox",
  68          Flags  => CMB_M_READONLY);
  69       pragma Assert ((Status and 1) = 1);
  70
  71       Sys_Assign
  72         (Status => Status,
  73          Devnam => "GNAT_Interrupt_Mailbox",
  74          Chan   => Snd_Interrupt_Chan,
  75          Flags  => AGN_M_WRITEONLY);
  76       pragma Assert ((Status and 1) = 1);
  77    end Initialize;
  78
  79 end System.Interrupt_Management;