gcc/ada/g-socthi-vms.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                    G N A T . S O C K E T S . T H I N                     --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --                     Copyright (C) 2002-2009, AdaCore                     --
  10 --                                                                          --
  11 -- GNAT 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.  GNAT 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 GNAT;  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 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  This package provides a target dependent thin interface to the sockets
  35 --  layer for use by the GNAT.Sockets package (g-socket.ads). This package
  36 --  should not be directly with'ed by an applications program.
  37
  38 --  This is the Alpha/VMS version
  39
  40 with Interfaces.C.Strings;
  41
  42 with GNAT.OS_Lib;
  43 with GNAT.Sockets.Thin_Common;
  44
  45 with System;
  46
  47 package GNAT.Sockets.Thin is
  48
  49    --  ??? more comments needed ???
  50
  51    use Thin_Common;
  52
  53    package C renames Interfaces.C;
  54
  55    use type C.size_t;
  56    type ssize_t is range -(2 ** (C.size_t'Size - 1))
  57      .. +(2 ** (C.size_t'Size - 1) - 1);
  58    --  Signed type of the same size as size_t
  59
  60    function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
  61    --  Returns last socket error number
  62
  63    procedure Set_Socket_Errno (Errno : Integer) renames GNAT.OS_Lib.Set_Errno;
  64    --  Set last socket error number
  65
  66    function Socket_Error_Message (Errno : Integer) return C.Strings.chars_ptr;
  67    --  Returns the error message string for the error number Errno. If Errno is
  68    --  not known, returns "Unknown system error".
  69
  70    function Host_Errno return Integer;
  71    pragma Import (C, Host_Errno, "__gnat_get_h_errno");
  72    --  Returns last host error number
  73
  74    package Host_Error_Messages is
  75
  76       function Host_Error_Message
  77         (H_Errno : Integer) return C.Strings.chars_ptr;
  78       --  Returns the error message string for the host error number H_Errno.
  79       --  If H_Errno is not known, returns "Unknown system error".
  80
  81    end Host_Error_Messages;
  82
  83    --------------------------------
  84    -- Standard library functions --
  85    --------------------------------
  86
  87    function C_Accept
  88      (S       : C.int;
  89       Addr    : System.Address;
  90       Addrlen : not null access C.int) return C.int;
  91
  92    function C_Bind
  93      (S       : C.int;
  94       Name    : System.Address;
  95       Namelen : C.int) return C.int;
  96
  97    function C_Close
  98      (Fd : C.int) return C.int;
  99
 100    function C_Connect
 101      (S       : C.int;
 102       Name    : System.Address;
 103       Namelen : C.int) return C.int;
 104
 105    function C_Gethostname
 106      (Name    : System.Address;
 107       Namelen : C.int) return C.int;
 108
 109    function C_Getpeername
 110      (S       : C.int;
 111       Name    : System.Address;
 112       Namelen : not null access C.int) return C.int;
 113
 114    function C_Getsockname
 115      (S       : C.int;
 116       Name    : System.Address;
 117       Namelen : not null access C.int) return C.int;
 118
 119    function C_Getsockopt
 120      (S       : C.int;
 121       Level   : C.int;
 122       Optname : C.int;
 123       Optval  : System.Address;
 124       Optlen  : not null access C.int) return C.int;
 125
 126    function C_Ioctl
 127      (S    : C.int;
 128       Req  : C.int;
 129       Arg  : access C.int) return C.int;
 130
 131    function C_Listen
 132      (S       : C.int;
 133       Backlog : C.int) return C.int;
 134
 135    function C_Recv
 136      (S     : C.int;
 137       Msg   : System.Address;
 138       Len   : C.int;
 139       Flags : C.int) return C.int;
 140
 141    function C_Recvfrom
 142      (S       : C.int;
 143       Msg     : System.Address;
 144       Len     : C.int;
 145       Flags   : C.int;
 146       From    : System.Address;
 147       Fromlen : not null access C.int) return C.int;
 148
 149    function C_Recvmsg
 150      (S     : C.int;
 151       Msg   : System.Address;
 152       Flags : C.int) return ssize_t;
 153
 154    function C_Select
 155      (Nfds      : C.int;
 156       Readfds   : access Fd_Set;
 157       Writefds  : access Fd_Set;
 158       Exceptfds : access Fd_Set;
 159       Timeout   : Timeval_Access) return C.int;
 160
 161    function C_Sendmsg
 162      (S     : C.int;
 163       Msg   : System.Address;
 164       Flags : C.int) return ssize_t;
 165
 166    function C_Sendto
 167      (S     : C.int;
 168       Msg   : System.Address;
 169       Len   : C.int;
 170       Flags : C.int;
 171       To    : System.Address;
 172       Tolen : C.int) return C.int;
 173
 174    function C_Setsockopt
 175      (S       : C.int;
 176       Level   : C.int;
 177       Optname : C.int;
 178       Optval  : System.Address;
 179       Optlen  : C.int) return C.int;
 180
 181    function C_Shutdown
 182      (S   : C.int;
 183       How : C.int) return C.int;
 184
 185    function C_Socket
 186      (Domain   : C.int;
 187       Typ      : C.int;
 188       Protocol : C.int) return C.int;
 189
 190    function C_Strerror
 191      (Errnum : C.int) return C.Strings.chars_ptr;
 192
 193    function C_System
 194      (Command : System.Address) return C.int;
 195
 196    -------------------------------------------------------
 197    -- Signalling file descriptors for selector abortion --
 198    -------------------------------------------------------
 199
 200    package Signalling_Fds is
 201
 202       function Create (Fds : not null access Fd_Pair) return C.int;
 203       pragma Convention (C, Create);
 204       --  Create a pair of connected descriptors suitable for use with C_Select
 205       --  (used for signalling in Selector objects).
 206
 207       function Read (Rsig : C.int) return C.int;
 208       pragma Convention (C, Read);
 209       --  Read one byte of data from rsig, the read end of a pair of signalling
 210       --  fds created by Create_Signalling_Fds.
 211
 212       function Write (Wsig : C.int) return C.int;
 213       pragma Convention (C, Write);
 214       --  Write one byte of data to wsig, the write end of a pair of signalling
 215       --  fds created by Create_Signalling_Fds.
 216
 217       procedure Close (Sig : C.int);
 218       pragma Convention (C, Close);
 219       --  Close one end of a pair of signalling fds (ignoring any error)
 220
 221    end Signalling_Fds;
 222
 223    -------------------------------------------
 224    -- Nonreentrant network databases access --
 225    -------------------------------------------
 226
 227    function Nonreentrant_Gethostbyname
 228      (Name : C.char_array) return Hostent_Access;
 229
 230    function Nonreentrant_Gethostbyaddr
 231      (Addr      : System.Address;
 232       Addr_Len  : C.int;
 233       Addr_Type : C.int) return Hostent_Access;
 234
 235    function Nonreentrant_Getservbyname
 236      (Name  : C.char_array;
 237       Proto : C.char_array) return Servent_Access;
 238
 239    function Nonreentrant_Getservbyport
 240      (Port  : C.int;
 241       Proto : C.char_array) return Servent_Access;
 242
 243    procedure Initialize;
 244    procedure Finalize;
 245
 246 private
 247
 248    pragma Import (C, C_Bind,          "DECC$BIND");
 249    pragma Import (C, C_Close,         "DECC$CLOSE");
 250    pragma Import (C, C_Gethostname,   "DECC$GETHOSTNAME");
 251    pragma Import (C, C_Getpeername,   "DECC$GETPEERNAME");
 252    pragma Import (C, C_Getsockname,   "DECC$GETSOCKNAME");
 253    pragma Import (C, C_Getsockopt,    "DECC$GETSOCKOPT");
 254    pragma Import (C, C_Listen,        "DECC$LISTEN");
 255    pragma Import (C, C_Select,        "DECC$SELECT");
 256    pragma Import (C, C_Setsockopt,    "DECC$SETSOCKOPT");
 257    pragma Import (C, C_Shutdown,      "DECC$SHUTDOWN");
 258    pragma Import (C, C_Strerror,      "DECC$STRERROR");
 259    pragma Import (C, C_System,        "DECC$SYSTEM");
 260
 261    pragma Import (C, Nonreentrant_Gethostbyname, "DECC$GETHOSTBYNAME");
 262    pragma Import (C, Nonreentrant_Gethostbyaddr, "DECC$GETHOSTBYADDR");
 263    pragma Import (C, Nonreentrant_Getservbyname, "DECC$GETSERVBYNAME");
 264    pragma Import (C, Nonreentrant_Getservbyport, "DECC$GETSERVBYPORT");
 265
 266 end GNAT.Sockets.Thin;