gcc/ada/g-socthi.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) 2001-2012, 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 default 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    --  This package is intended for hosts implementing BSD sockets with a
  49    --  standard interface. It will be used as a default for all the platforms
  50    --  that do not have a specific version of this file.
  51
  52    use Thin_Common;
  53
  54    package C renames Interfaces.C;
  55
  56    use type System.CRTL.ssize_t;
  57
  58    function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
  59    --  Returns last socket error number
  60
  61    function Socket_Error_Message (Errno : Integer) return C.Strings.chars_ptr;
  62    --  Returns the error message string for the error number Errno. If Errno is
  63    --  not known, returns "Unknown system error".
  64
  65    function Host_Errno return Integer;
  66    pragma Import (C, Host_Errno, "__gnat_get_h_errno");
  67    --  Returns last host error number
  68
  69    package Host_Error_Messages is
  70
  71       function Host_Error_Message
  72         (H_Errno : Integer) return C.Strings.chars_ptr;
  73       --  Returns the error message string for the host error number H_Errno.
  74       --  If H_Errno is not known, returns "Unknown system error".
  75
  76    end Host_Error_Messages;
  77
  78    --------------------------------
  79    -- Standard library functions --
  80    --------------------------------
  81
  82    function C_Accept
  83      (S       : C.int;
  84       Addr    : System.Address;
  85       Addrlen : not null access C.int) return C.int;
  86
  87    function C_Bind
  88      (S       : C.int;
  89       Name    : System.Address;
  90       Namelen : C.int) return C.int;
  91
  92    function C_Close
  93      (Fd : C.int) return C.int;
  94
  95    function C_Connect
  96      (S       : C.int;
  97       Name    : System.Address;
  98       Namelen : C.int) return C.int;
  99
 100    function C_Gethostname
 101      (Name    : System.Address;
 102       Namelen : C.int) return C.int;
 103
 104    function C_Getpeername
 105      (S       : C.int;
 106       Name    : System.Address;
 107       Namelen : not null access C.int) return C.int;
 108
 109    function C_Getsockname
 110      (S       : C.int;
 111       Name    : System.Address;
 112       Namelen : not null access C.int) return C.int;
 113
 114    function C_Getsockopt
 115      (S       : C.int;
 116       Level   : C.int;
 117       Optname : C.int;
 118       Optval  : System.Address;
 119       Optlen  : not null access C.int) return C.int;
 120
 121    function Socket_Ioctl
 122      (S   : C.int;
 123       Req : SOSC.IOCTL_Req_T;
 124       Arg : access C.int) return C.int;
 125
 126    function C_Listen
 127      (S       : C.int;
 128       Backlog : C.int) return C.int;
 129
 130    function C_Recv
 131      (S     : C.int;
 132       Msg   : System.Address;
 133       Len   : C.int;
 134       Flags : C.int) return C.int;
 135
 136    function C_Recvfrom
 137      (S       : C.int;
 138       Msg     : System.Address;
 139       Len     : C.int;
 140       Flags   : C.int;
 141       From    : System.Address;
 142       Fromlen : not null access C.int) return C.int;
 143
 144    function C_Recvmsg
 145      (S     : C.int;
 146       Msg   : System.Address;
 147       Flags : C.int) return System.CRTL.ssize_t;
 148
 149    function C_Select
 150      (Nfds      : C.int;
 151       Readfds   : access Fd_Set;
 152       Writefds  : access Fd_Set;
 153       Exceptfds : access Fd_Set;
 154       Timeout   : Timeval_Access) return C.int;
 155
 156    function C_Sendmsg
 157      (S     : C.int;
 158       Msg   : System.Address;
 159       Flags : C.int) return System.CRTL.ssize_t;
 160
 161    function C_Sendto
 162      (S     : C.int;
 163       Msg   : System.Address;
 164       Len   : C.int;
 165       Flags : C.int;
 166       To    : System.Address;
 167       Tolen : C.int) return C.int;
 168
 169    function C_Setsockopt
 170      (S       : C.int;
 171       Level   : C.int;
 172       Optname : C.int;
 173       Optval  : System.Address;
 174       Optlen  : C.int) return C.int;
 175
 176    function C_Shutdown
 177      (S   : C.int;
 178       How : C.int) return C.int;
 179
 180    function C_Socket
 181      (Domain   : C.int;
 182       Typ      : C.int;
 183       Protocol : C.int) return C.int;
 184
 185    function C_System
 186      (Command : System.Address) return C.int;
 187
 188    -------------------------------------------------------
 189    -- Signalling file descriptors for selector abortion --
 190    -------------------------------------------------------
 191
 192    package Signalling_Fds is
 193
 194       function Create (Fds : not null access Fd_Pair) return C.int;
 195       pragma Convention (C, Create);
 196       --  Create a pair of connected descriptors suitable for use with C_Select
 197       --  (used for signalling in Selector objects).
 198
 199       function Read (Rsig : C.int) return C.int;
 200       pragma Convention (C, Read);
 201       --  Read one byte of data from rsig, the read end of a pair of signalling
 202       --  fds created by Create_Signalling_Fds.
 203
 204       function Write (Wsig : C.int) return C.int;
 205       pragma Convention (C, Write);
 206       --  Write one byte of data to wsig, the write end of a pair of signalling
 207       --  fds created by Create_Signalling_Fds.
 208
 209       procedure Close (Sig : C.int);
 210       pragma Convention (C, Close);
 211       --  Close one end of a pair of signalling fds (ignoring any error)
 212
 213    end Signalling_Fds;
 214
 215    -------------------------------------------
 216    -- Nonreentrant network databases access --
 217    -------------------------------------------
 218
 219    --  The following are used only on systems that have nonreentrant
 220    --  getXXXbyYYY functions, and do NOT have corresponding getXXXbyYYY_
 221    --  functions. Currently, LynxOS is the only such system.
 222
 223    function Nonreentrant_Gethostbyname
 224      (Name : C.char_array) return Hostent_Access;
 225
 226    function Nonreentrant_Gethostbyaddr
 227      (Addr      : System.Address;
 228       Addr_Len  : C.int;
 229       Addr_Type : C.int) return Hostent_Access;
 230
 231    function Nonreentrant_Getservbyname
 232      (Name  : C.char_array;
 233       Proto : C.char_array) return Servent_Access;
 234
 235    function Nonreentrant_Getservbyport
 236      (Port  : C.int;
 237       Proto : C.char_array) return Servent_Access;
 238
 239    procedure Initialize;
 240    procedure Finalize;
 241
 242 private
 243    pragma Import (C, C_Bind, "bind");
 244    pragma Import (C, C_Close, "close");
 245    pragma Import (C, C_Gethostname, "gethostname");
 246    pragma Import (C, C_Getpeername, "getpeername");
 247    pragma Import (C, C_Getsockname, "getsockname");
 248    pragma Import (C, C_Getsockopt, "getsockopt");
 249    pragma Import (C, C_Listen, "listen");
 250    pragma Import (C, C_Select, "select");
 251    pragma Import (C, C_Setsockopt, "setsockopt");
 252    pragma Import (C, C_Shutdown, "shutdown");
 253    pragma Import (C, C_System, "system");
 254
 255    pragma Import (C, Nonreentrant_Gethostbyname, "gethostbyname");
 256    pragma Import (C, Nonreentrant_Gethostbyaddr, "gethostbyaddr");
 257    pragma Import (C, Nonreentrant_Getservbyname, "getservbyname");
 258    pragma Import (C, Nonreentrant_Getservbyport, "getservbyport");
 259
 260 end GNAT.Sockets.Thin;