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) 2002-2010, 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 3,  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.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This package provides a target dependent thin interface to the sockets
  33 --  layer for use by the GNAT.Sockets package (g-socket.ads). This package
  34 --  should not be directly with'ed by an applications program.
  35
  36 --  This is the Alpha/VMS version
  37
  38 with Interfaces.C.Strings;
  39
  40 with GNAT.OS_Lib;
  41 with GNAT.Sockets.Thin_Common;
  42
  43 with System;
  44 with System.CRTL;
  45
  46 package GNAT.Sockets.Thin is
  47
  48    --  ??? more comments needed ???
  49
  50    use Thin_Common;
  51
  52    package C renames Interfaces.C;
  53
  54    use type System.CRTL.ssize_t;
  55
  56    function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
  57    --  Returns last socket error number
  58
  59    procedure Set_Socket_Errno (Errno : Integer) renames GNAT.OS_Lib.Set_Errno;
  60    --  Set last socket error number
  61
  62    function Socket_Error_Message (Errno : Integer) return C.Strings.chars_ptr;
  63    --  Returns the error message string for the error number Errno. If Errno is
  64    --  not known, returns "Unknown system error".
  65
  66    function Host_Errno return Integer;
  67    pragma Import (C, Host_Errno, "__gnat_get_h_errno");
  68    --  Returns last host error number
  69
  70    package Host_Error_Messages is
  71
  72       function Host_Error_Message
  73         (H_Errno : Integer) return C.Strings.chars_ptr;
  74       --  Returns the error message string for the host error number H_Errno.
  75       --  If H_Errno is not known, returns "Unknown system error".
  76
  77    end Host_Error_Messages;
  78
  79    --------------------------------
  80    -- Standard library functions --
  81    --------------------------------
  82
  83    function C_Accept
  84      (S       : C.int;
  85       Addr    : System.Address;
  86       Addrlen : not null access C.int) return C.int;
  87
  88    function C_Bind
  89      (S       : C.int;
  90       Name    : System.Address;
  91       Namelen : C.int) return C.int;
  92
  93    function C_Close
  94      (Fd : C.int) return C.int;
  95
  96    function C_Connect
  97      (S       : C.int;
  98       Name    : System.Address;
  99       Namelen : C.int) return C.int;
 100
 101    function C_Gethostname
 102      (Name    : System.Address;
 103       Namelen : C.int) return C.int;
 104
 105    function C_Getpeername
 106      (S       : C.int;
 107       Name    : System.Address;
 108       Namelen : not null access C.int) return C.int;
 109
 110    function C_Getsockname
 111      (S       : C.int;
 112       Name    : System.Address;
 113       Namelen : not null access C.int) return C.int;
 114
 115    function C_Getsockopt
 116      (S       : C.int;
 117       Level   : C.int;
 118       Optname : C.int;
 119       Optval  : System.Address;
 120       Optlen  : not null access C.int) return C.int;
 121
 122    function Socket_Ioctl
 123      (S   : C.int;
 124       Req : C.int;
 125       Arg : access C.int) return C.int;
 126
 127    function C_Listen
 128      (S       : C.int;
 129       Backlog : C.int) return C.int;
 130
 131    function C_Recv
 132      (S     : C.int;
 133       Msg   : System.Address;
 134       Len   : C.int;
 135       Flags : C.int) return C.int;
 136
 137    function C_Recvfrom
 138      (S       : C.int;
 139       Msg     : System.Address;
 140       Len     : C.int;
 141       Flags   : C.int;
 142       From    : System.Address;
 143       Fromlen : not null access C.int) return C.int;
 144
 145    function C_Recvmsg
 146      (S     : C.int;
 147       Msg   : System.Address;
 148       Flags : C.int) return System.CRTL.ssize_t;
 149
 150    function C_Select
 151      (Nfds      : C.int;
 152       Readfds   : access Fd_Set;
 153       Writefds  : access Fd_Set;
 154       Exceptfds : access Fd_Set;
 155       Timeout   : Timeval_Access) return C.int;
 156
 157    function C_Sendmsg
 158      (S     : C.int;
 159       Msg   : System.Address;
 160       Flags : C.int) return System.CRTL.ssize_t;
 161
 162    function C_Sendto
 163      (S     : C.int;
 164       Msg   : System.Address;
 165       Len   : C.int;
 166       Flags : C.int;
 167       To    : System.Address;
 168       Tolen : C.int) return C.int;
 169
 170    function C_Setsockopt
 171      (S       : C.int;
 172       Level   : C.int;
 173       Optname : C.int;
 174       Optval  : System.Address;
 175       Optlen  : C.int) return C.int;
 176
 177    function C_Shutdown
 178      (S   : C.int;
 179       How : C.int) return C.int;
 180
 181    function C_Socket
 182      (Domain   : C.int;
 183       Typ      : C.int;
 184       Protocol : C.int) return C.int;
 185
 186    function C_System
 187      (Command : System.Address) return C.int;
 188
 189    -------------------------------------------------------
 190    -- Signalling file descriptors for selector abortion --
 191    -------------------------------------------------------
 192
 193    package Signalling_Fds is
 194
 195       function Create (Fds : not null access Fd_Pair) return C.int;
 196       pragma Convention (C, Create);
 197       --  Create a pair of connected descriptors suitable for use with C_Select
 198       --  (used for signalling in Selector objects).
 199
 200       function Read (Rsig : C.int) return C.int;
 201       pragma Convention (C, Read);
 202       --  Read one byte of data from rsig, the read end of a pair of signalling
 203       --  fds created by Create_Signalling_Fds.
 204
 205       function Write (Wsig : C.int) return C.int;
 206       pragma Convention (C, Write);
 207       --  Write one byte of data to wsig, the write end of a pair of signalling
 208       --  fds created by Create_Signalling_Fds.
 209
 210       procedure Close (Sig : C.int);
 211       pragma Convention (C, Close);
 212       --  Close one end of a pair of signalling fds (ignoring any error)
 213
 214    end Signalling_Fds;
 215
 216    -------------------------------------------
 217    -- Nonreentrant network databases access --
 218    -------------------------------------------
 219
 220    function Nonreentrant_Gethostbyname
 221      (Name : C.char_array) return Hostent_Access;
 222
 223    function Nonreentrant_Gethostbyaddr
 224      (Addr      : System.Address;
 225       Addr_Len  : C.int;
 226       Addr_Type : C.int) return Hostent_Access;
 227
 228    function Nonreentrant_Getservbyname
 229      (Name  : C.char_array;
 230       Proto : C.char_array) return Servent_Access;
 231
 232    function Nonreentrant_Getservbyport
 233      (Port  : C.int;
 234       Proto : C.char_array) return Servent_Access;
 235
 236    procedure Initialize;
 237    procedure Finalize;
 238
 239 private
 240
 241    pragma Import (C, C_Bind,          "DECC$BIND");
 242    pragma Import (C, C_Close,         "DECC$CLOSE");
 243    pragma Import (C, C_Gethostname,   "DECC$GETHOSTNAME");
 244    pragma Import (C, C_Getpeername,   "DECC$GETPEERNAME");
 245    pragma Import (C, C_Getsockname,   "DECC$GETSOCKNAME");
 246    pragma Import (C, C_Getsockopt,    "DECC$GETSOCKOPT");
 247    pragma Import (C, C_Listen,        "DECC$LISTEN");
 248    pragma Import (C, C_Select,        "DECC$SELECT");
 249    pragma Import (C, C_Setsockopt,    "DECC$SETSOCKOPT");
 250    pragma Import (C, C_Shutdown,      "DECC$SHUTDOWN");
 251    pragma Import (C, C_System,        "DECC$SYSTEM");
 252
 253    pragma Import (C, Nonreentrant_Gethostbyname, "DECC$GETHOSTBYNAME");
 254    pragma Import (C, Nonreentrant_Gethostbyaddr, "DECC$GETHOSTBYADDR");
 255    pragma Import (C, Nonreentrant_Getservbyname, "DECC$GETSERVBYNAME");
 256    pragma Import (C, Nonreentrant_Getservbyport, "DECC$GETSERVBYPORT");
 257
 258 end GNAT.Sockets.Thin;