1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
5 -- G N A T . S O C K E T S . T H I N --
9 -- Copyright (C) 2002-2009, AdaCore --
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. --
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. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
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.
38 -- This is the Alpha/VMS version
40 with Interfaces.C.Strings;
43 with GNAT.Sockets.Thin_Common;
48 package GNAT.Sockets.Thin is
50 -- ??? more comments needed ???
54 package C renames Interfaces.C;
56 use type System.CRTL.ssize_t;
58 function Socket_Errno return Integer renames GNAT.OS_Lib.Errno;
59 -- Returns last socket error number
61 procedure Set_Socket_Errno (Errno : Integer) renames GNAT.OS_Lib.Set_Errno;
62 -- Set last socket error number
64 function Socket_Error_Message (Errno : Integer) return C.Strings.chars_ptr;
65 -- Returns the error message string for the error number Errno. If Errno is
66 -- not known, returns "Unknown system error".
68 function Host_Errno return Integer;
69 pragma Import (C, Host_Errno, "__gnat_get_h_errno");
70 -- Returns last host error number
72 package Host_Error_Messages is
74 function Host_Error_Message
75 (H_Errno : Integer) return C.Strings.chars_ptr;
76 -- Returns the error message string for the host error number H_Errno.
77 -- If H_Errno is not known, returns "Unknown system error".
79 end Host_Error_Messages;
81 --------------------------------
82 -- Standard library functions --
83 --------------------------------
87 Addr : System.Address;
88 Addrlen : not null access C.int) return C.int;
92 Name : System.Address;
93 Namelen : C.int) return C.int;
96 (Fd : C.int) return C.int;
100 Name : System.Address;
101 Namelen : C.int) return C.int;
103 function C_Gethostname
104 (Name : System.Address;
105 Namelen : C.int) return C.int;
107 function C_Getpeername
109 Name : System.Address;
110 Namelen : not null access C.int) return C.int;
112 function C_Getsockname
114 Name : System.Address;
115 Namelen : not null access C.int) return C.int;
117 function C_Getsockopt
121 Optval : System.Address;
122 Optlen : not null access C.int) return C.int;
124 function Socket_Ioctl
127 Arg : access C.int) return C.int;
131 Backlog : C.int) return C.int;
135 Msg : System.Address;
137 Flags : C.int) return C.int;
141 Msg : System.Address;
144 From : System.Address;
145 Fromlen : not null access C.int) return C.int;
149 Msg : System.Address;
150 Flags : C.int) return System.CRTL.ssize_t;
154 Readfds : access Fd_Set;
155 Writefds : access Fd_Set;
156 Exceptfds : access Fd_Set;
157 Timeout : Timeval_Access) return C.int;
161 Msg : System.Address;
162 Flags : C.int) return System.CRTL.ssize_t;
166 Msg : System.Address;
170 Tolen : C.int) return C.int;
172 function C_Setsockopt
176 Optval : System.Address;
177 Optlen : C.int) return C.int;
181 How : C.int) return C.int;
186 Protocol : C.int) return C.int;
189 (Command : System.Address) return C.int;
191 -------------------------------------------------------
192 -- Signalling file descriptors for selector abortion --
193 -------------------------------------------------------
195 package Signalling_Fds is
197 function Create (Fds : not null access Fd_Pair) return C.int;
198 pragma Convention (C, Create);
199 -- Create a pair of connected descriptors suitable for use with C_Select
200 -- (used for signalling in Selector objects).
202 function Read (Rsig : C.int) return C.int;
203 pragma Convention (C, Read);
204 -- Read one byte of data from rsig, the read end of a pair of signalling
205 -- fds created by Create_Signalling_Fds.
207 function Write (Wsig : C.int) return C.int;
208 pragma Convention (C, Write);
209 -- Write one byte of data to wsig, the write end of a pair of signalling
210 -- fds created by Create_Signalling_Fds.
212 procedure Close (Sig : C.int);
213 pragma Convention (C, Close);
214 -- Close one end of a pair of signalling fds (ignoring any error)
218 -------------------------------------------
219 -- Nonreentrant network databases access --
220 -------------------------------------------
222 function Nonreentrant_Gethostbyname
223 (Name : C.char_array) return Hostent_Access;
225 function Nonreentrant_Gethostbyaddr
226 (Addr : System.Address;
228 Addr_Type : C.int) return Hostent_Access;
230 function Nonreentrant_Getservbyname
231 (Name : C.char_array;
232 Proto : C.char_array) return Servent_Access;
234 function Nonreentrant_Getservbyport
236 Proto : C.char_array) return Servent_Access;
238 procedure Initialize;
243 pragma Import (C, C_Bind, "DECC$BIND");
244 pragma Import (C, C_Close, "DECC$CLOSE");
245 pragma Import (C, C_Gethostname, "DECC$GETHOSTNAME");
246 pragma Import (C, C_Getpeername, "DECC$GETPEERNAME");
247 pragma Import (C, C_Getsockname, "DECC$GETSOCKNAME");
248 pragma Import (C, C_Getsockopt, "DECC$GETSOCKOPT");
249 pragma Import (C, C_Listen, "DECC$LISTEN");
250 pragma Import (C, C_Select, "DECC$SELECT");
251 pragma Import (C, C_Setsockopt, "DECC$SETSOCKOPT");
252 pragma Import (C, C_Shutdown, "DECC$SHUTDOWN");
253 pragma Import (C, C_System, "DECC$SYSTEM");
255 pragma Import (C, Nonreentrant_Gethostbyname, "DECC$GETHOSTBYNAME");
256 pragma Import (C, Nonreentrant_Gethostbyaddr, "DECC$GETHOSTBYADDR");
257 pragma Import (C, Nonreentrant_Getservbyname, "DECC$GETSERVBYNAME");
258 pragma Import (C, Nonreentrant_Getservbyport, "DECC$GETSERVBYPORT");
260 end GNAT.Sockets.Thin;