gcc/ada/5vintman.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                GNU ADA 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 --                                                                          --
  10 --           Copyright (C) 1991-2001, Florida State University              --
  11 --                                                                          --
  12 -- GNARL 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 2,  or (at your option) any later ver- --
  15 -- sion. GNARL 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.  See the GNU General Public License --
  18 -- for  more details.  You should have  received  a copy of the GNU General --
  19 -- Public License  distributed with GNARL; see file COPYING.  If not, write --
  20 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  21 -- MA 02111-1307, USA.                                                      --
  22 --                                                                          --
  23 -- As a special exception,  if other files  instantiate  generics from this --
  24 -- unit, or you link  this unit with other files  to produce an executable, --
  25 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  26 -- covered  by the  GNU  General  Public  License.  This exception does not --
  27 -- however invalidate  any other reasons why  the executable file  might be --
  28 -- covered by the  GNU Public License.                                      --
  29 --                                                                          --
  30 -- GNARL was developed by the GNARL team at Florida State University. It is --
  31 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
  32 -- State University (http://www.gnat.com).                                  --
  33 --                                                                          --
  34 ------------------------------------------------------------------------------
  35
  36 --  This is a OpenVMS/Alpha version of this package.
  37
  38 --  PLEASE DO NOT add any dependences on other packages.
  39 --  This package is designed to work with or without tasking support.
  40
  41 --  See the other warnings in the package specification before making
  42 --  any modifications to this file.
  43
  44 with System.OS_Interface;
  45 --  used for various Constants, Signal and types
  46
  47 package body System.Interrupt_Management is
  48
  49    use System.OS_Interface;
  50    use type unsigned_long;
  51
  52    ---------------------------
  53    -- Initialize_Interrupts --
  54    ---------------------------
  55
  56    procedure Initialize_Interrupts is
  57       Status : Cond_Value_Type;
  58    begin
  59       Sys_Crembx
  60         (Status => Status,
  61          Prmflg => False,
  62          Chan   => Rcv_Interrupt_Chan,
  63          Maxmsg => Interrupt_ID'Size,
  64          Bufquo => Interrupt_Bufquo,
  65          Lognam => "GNAT_Interrupt_Mailbox",
  66          Flags  => CMB_M_READONLY);
  67
  68       pragma Assert ((Status and 1) = 1);
  69
  70       Sys_Assign
  71         (Status => Status,
  72          Devnam => "GNAT_Interrupt_Mailbox",
  73          Chan   => Snd_Interrupt_Chan,
  74          Flags  => AGN_M_WRITEONLY);
  75
  76       pragma Assert ((Status and 1) = 1);
  77
  78    end Initialize_Interrupts;
  79
  80 begin
  81    --  Unused
  82    Abort_Task_Interrupt := Interrupt_ID_0;
  83
  84    Reserve := Reserve or Keep_Unmasked or Keep_Masked;
  85
  86    Reserve (Interrupt_ID_0) := True;
  87
  88    Initialize_Interrupts;
  89
  90 end System.Interrupt_Management;