gcc/ada/a-interr.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
   4 --                                                                          --
   5 --                         A D A . I N T E R R U P T S                      --
   6 --                                                                          --
   7 --                                  B o d y                                 --
   8 --                                                                          --
   9 --             Copyright (C) 1991-1994, Florida State University            --
  10 --                     Copyright (C) 1995-2006, AdaCore                     --
  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,  51  Franklin  Street,  Fifth  Floor, --
  21 -- Boston, MA 02110-1301, 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.       --
  31 -- Extensive contributions were provided by Ada Core Technologies, Inc.     --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 with Unchecked_Conversion;
  36
  37 package body Ada.Interrupts is
  38
  39    package SI renames System.Interrupts;
  40
  41    function To_System is new Unchecked_Conversion
  42      (Parameterless_Handler, SI.Parameterless_Handler);
  43
  44    function To_Ada is new Unchecked_Conversion
  45      (SI.Parameterless_Handler, Parameterless_Handler);
  46
  47    --------------------
  48    -- Attach_Handler --
  49    --------------------
  50
  51    procedure Attach_Handler
  52      (New_Handler : Parameterless_Handler;
  53       Interrupt   : Interrupt_ID)
  54    is
  55    begin
  56       SI.Attach_Handler
  57         (To_System (New_Handler), SI.Interrupt_ID (Interrupt), False);
  58    end Attach_Handler;
  59
  60    ---------------------
  61    -- Current_Handler --
  62    ---------------------
  63
  64    function Current_Handler
  65      (Interrupt : Interrupt_ID) return Parameterless_Handler
  66    is
  67    begin
  68       return To_Ada (SI.Current_Handler (SI.Interrupt_ID (Interrupt)));
  69    end Current_Handler;
  70
  71    --------------------
  72    -- Detach_Handler --
  73    --------------------
  74
  75    procedure Detach_Handler (Interrupt : Interrupt_ID) is
  76    begin
  77       SI.Detach_Handler (SI.Interrupt_ID (Interrupt), False);
  78    end Detach_Handler;
  79
  80    ----------------------
  81    -- Exchange_Handler --
  82    ----------------------
  83
  84    procedure Exchange_Handler
  85      (Old_Handler : out Parameterless_Handler;
  86       New_Handler : Parameterless_Handler;
  87       Interrupt   : Interrupt_ID)
  88    is
  89       H : SI.Parameterless_Handler;
  90
  91    begin
  92       SI.Exchange_Handler
  93         (H, To_System (New_Handler),
  94          SI.Interrupt_ID (Interrupt), False);
  95       Old_Handler := To_Ada (H);
  96    end Exchange_Handler;
  97
  98    -----------------
  99    -- Is_Attached --
 100    -----------------
 101
 102    function Is_Attached (Interrupt : Interrupt_ID) return Boolean is
 103    begin
 104       return SI.Is_Handler_Attached (SI.Interrupt_ID (Interrupt));
 105    end Is_Attached;
 106
 107    -----------------
 108    -- Is_Reserved --
 109    -----------------
 110
 111    function Is_Reserved (Interrupt : Interrupt_ID) return Boolean is
 112    begin
 113       return SI.Is_Reserved (SI.Interrupt_ID (Interrupt));
 114    end Is_Reserved;
 115
 116    ---------------
 117    -- Reference --
 118    ---------------
 119
 120    function Reference (Interrupt : Interrupt_ID) return System.Address is
 121    begin
 122       return SI.Reference (SI.Interrupt_ID (Interrupt));
 123    end Reference;
 124
 125 end Ada.Interrupts;