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 --         Copyright (C) 1992-2002, 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,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, 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 --  PLEASE DO NOT add any dependences on other packages.
  37 --  This package is designed to work with or without tasking support.
  38
  39 --  See the other warnings in the package specification before making
  40 --  any modifications to this file.
  41
  42 with System.OS_Interface;
  43 --  used for various Constants, Signal and types
  44
  45 package body System.Interrupt_Management is
  46
  47    use System.OS_Interface;
  48    use type unsigned_long;
  49
  50    ---------------------------
  51    -- Initialize_Interrupts --
  52    ---------------------------
  53
  54    procedure Initialize_Interrupts is
  55       Status : Cond_Value_Type;
  56
  57    begin
  58       Sys_Crembx
  59         (Status => Status,
  60          Prmflg => False,
  61          Chan   => Rcv_Interrupt_Chan,
  62          Maxmsg => Interrupt_ID'Size,
  63          Bufquo => Interrupt_Bufquo,
  64          Lognam => "GNAT_Interrupt_Mailbox",
  65          Flags  => CMB_M_READONLY);
  66
  67       pragma Assert ((Status and 1) = 1);
  68
  69       Sys_Assign
  70         (Status => Status,
  71          Devnam => "GNAT_Interrupt_Mailbox",
  72          Chan   => Snd_Interrupt_Chan,
  73          Flags  => AGN_M_WRITEONLY);
  74
  75       pragma Assert ((Status and 1) = 1);
  76    end Initialize_Interrupts;
  77
  78 begin
  79    --  Unused
  80
  81    Abort_Task_Interrupt := Interrupt_ID_0;
  82
  83    Reserve := Reserve or Keep_Unmasked or Keep_Masked;
  84
  85    Reserve (Interrupt_ID_0) := True;
  86
  87    Initialize_Interrupts;
  88 end System.Interrupt_Management;