gcc/ada/i-os2lib.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                     I N T E R F A C E S . O S 2 L I B                    --
   6 --                                                                          --
   7 --                                  S p e c                                 --
   8 --                                                                          --
   9 --                                                                          --
  10 --          Copyright (C) 1993-1997 Free Software Foundation, Inc.          --
  11 --                                                                          --
  12 -- GNAT 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.  GNAT 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 GNAT;  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 -- GNAT was originally developed  by the GNAT team at  New York University. --
  31 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  32 --                                                                          --
  33 ------------------------------------------------------------------------------
  34
  35 --  This package (and children) provide interface definitions to the standard
  36 --  OS/2 Library. They are merely a translation of the various <bse*.h> files.
  37
  38 --  It is intended that higher level interfaces (with better names, and
  39 --  stronger typing!) be built on top of this one for Ada (i.e. clean)
  40 --  programming.
  41
  42 --  We have chosen to keep names, types, etc.  as close as possible to the
  43 --  C definition to provide easier reference to the documentation. The main
  44 --  exception is when a formal and its type (in C) differed only by the case
  45 --  of letters (like in HMUX hmux). In this case, we have prepended "F_" to
  46 --  the formal (i.e. F_hmux : HMUX).
  47
  48 with Interfaces.C;
  49 with Interfaces.C.Strings;
  50 with System;
  51
  52 package Interfaces.OS2Lib is
  53 pragma Preelaborate (OS2Lib);
  54
  55    package IC  renames Interfaces.C;
  56    package ICS renames Interfaces.C.Strings;
  57
  58    -------------------
  59    -- General Types --
  60    -------------------
  61
  62    type    APIRET   is new IC.unsigned_long;
  63    type    APIRET16 is new IC.unsigned_short;
  64    subtype APIRET32 is     APIRET;
  65
  66    subtype PSZ    is ICS.chars_ptr;
  67    subtype PCHAR  is ICS.chars_ptr;
  68    subtype PVOID  is System.Address;
  69    type    PPVOID is access all PVOID;
  70
  71    type BOOL32 is new IC.unsigned_long;
  72    False32 : constant BOOL32 := 0;
  73    True32  : constant BOOL32 := 1;
  74
  75    type UCHAR   is new IC.unsigned_char;
  76    type USHORT  is new IC.unsigned_short;
  77    type ULONG   is new IC.unsigned_long;
  78    type PULONG  is access all ULONG;
  79
  80    --  Coprocessor stack register element.
  81
  82    type FPREG is record
  83       losig             : ULONG;        --  Low 32-bits of the mantissa
  84       hisig             : ULONG;        --  High 32-bits of the mantissa
  85       signexp           : USHORT;       --  Sign and exponent
  86    end record;
  87    pragma Convention (C, FPREG);
  88
  89    type AULONG is array (IC.size_t range <>) of ULONG;
  90    type AFPREG is array (IC.size_t range <>) of FPREG;
  91
  92    type LHANDLE is new IC.unsigned_long;
  93
  94    NULLHANDLE : constant := 0;
  95
  96    ---------------------
  97    -- Time Management --
  98    ---------------------
  99
 100    function DosSleep (How_long : ULONG) return APIRET;
 101    pragma Import (C, DosSleep, "DosSleep");
 102
 103    type DATETIME is record
 104       hours      : UCHAR;
 105       minutes    : UCHAR;
 106       seconds    : UCHAR;
 107       hundredths : UCHAR;
 108       day        : UCHAR;
 109       month      : UCHAR;
 110       year       : USHORT;
 111       timezone   : IC.short;
 112       weekday    : UCHAR;
 113    end record;
 114
 115    type PDATETIME is access all DATETIME;
 116
 117    function DosGetDateTime (pdt : PDATETIME) return APIRET;
 118    pragma Import (C, DosGetDateTime, "DosGetDateTime");
 119
 120    function DosSetDateTime (pdt : PDATETIME) return APIRET;
 121    pragma Import (C, DosSetDateTime, "DosSetDateTime");
 122
 123    ----------------------------
 124    -- Miscelleneous Features --
 125    ----------------------------
 126
 127    --  Features which do not fit any child
 128
 129    function DosBeep (Freq : ULONG; Dur : ULONG) return APIRET;
 130    pragma Import (C, DosBeep, "DosBeep");
 131
 132    procedure Must_Not_Fail (Return_Code : OS2Lib.APIRET);
 133    pragma Inline (Must_Not_Fail);
 134    --  Many OS/2 functions return APIRET and are not supposed to fail. In C
 135    --  style, these would be called as procedures, disregarding the returned
 136    --  value. This procedure can be used to achieve the same effect with a
 137    --  call of the form: Must_Not_Fail (Some_OS2_Function (...));
 138
 139    procedure Sem_Must_Not_Fail (Return_Code : OS2Lib.APIRET);
 140    pragma Inline (Sem_Must_Not_Fail);
 141    --  Similar to Must_Not_Fail, but used in the case of DosPostEventSem,
 142    --  where the "error" code ERROR_ALREADY_POSTED is not really an error.
 143
 144 end Interfaces.OS2Lib;