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
;
47 package GNAT
.Sockets
.Thin
is
49 -- ??? more comments needed ???
53 package C
renames Interfaces
.C
;
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
60 function Socket_Errno
return Integer renames GNAT
.OS_Lib
.Errno
;
61 -- Returns last socket error number
63 procedure Set_Socket_Errno
(Errno
: Integer) renames GNAT
.OS_Lib
.Set_Errno
;
64 -- Set last socket error number
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".
70 function Host_Errno
return Integer;
71 pragma Import
(C
, Host_Errno
, "__gnat_get_h_errno");
72 -- Returns last host error number
74 package Host_Error_Messages
is
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".
81 end Host_Error_Messages
;
83 --------------------------------
84 -- Standard library functions --
85 --------------------------------
89 Addr
: System
.Address
;
90 Addrlen
: not null access C
.int
) return C
.int
;
94 Name
: System
.Address
;
95 Namelen
: C
.int
) return C
.int
;
98 (Fd
: C
.int
) return C
.int
;
102 Name
: System
.Address
;
103 Namelen
: C
.int
) return C
.int
;
105 function C_Gethostname
106 (Name
: System
.Address
;
107 Namelen
: C
.int
) return C
.int
;
109 function C_Getpeername
111 Name
: System
.Address
;
112 Namelen
: not null access C
.int
) return C
.int
;
114 function C_Getsockname
116 Name
: System
.Address
;
117 Namelen
: not null access C
.int
) return C
.int
;
119 function C_Getsockopt
123 Optval
: System
.Address
;
124 Optlen
: not null access C
.int
) return C
.int
;
129 Arg
: access C
.int
) return C
.int
;
133 Backlog
: C
.int
) return C
.int
;
137 Msg
: System
.Address
;
139 Flags
: C
.int
) return C
.int
;
143 Msg
: System
.Address
;
146 From
: System
.Address
;
147 Fromlen
: not null access C
.int
) return C
.int
;
151 Msg
: System
.Address
;
152 Flags
: C
.int
) return ssize_t
;
156 Readfds
: access Fd_Set
;
157 Writefds
: access Fd_Set
;
158 Exceptfds
: access Fd_Set
;
159 Timeout
: Timeval_Access
) return C
.int
;
163 Msg
: System
.Address
;
164 Flags
: C
.int
) return ssize_t
;
168 Msg
: System
.Address
;
172 Tolen
: C
.int
) return C
.int
;
174 function C_Setsockopt
178 Optval
: System
.Address
;
179 Optlen
: C
.int
) return C
.int
;
183 How
: C
.int
) return C
.int
;
188 Protocol
: C
.int
) return C
.int
;
191 (Errnum
: C
.int
) return C
.Strings
.chars_ptr
;
194 (Command
: System
.Address
) return C
.int
;
196 -------------------------------------------------------
197 -- Signalling file descriptors for selector abortion --
198 -------------------------------------------------------
200 package Signalling_Fds
is
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).
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.
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.
217 procedure Close
(Sig
: C
.int
);
218 pragma Convention
(C
, Close
);
219 -- Close one end of a pair of signalling fds (ignoring any error)
223 -------------------------------------------
224 -- Nonreentrant network databases access --
225 -------------------------------------------
227 function Nonreentrant_Gethostbyname
228 (Name
: C
.char_array
) return Hostent_Access
;
230 function Nonreentrant_Gethostbyaddr
231 (Addr
: System
.Address
;
233 Addr_Type
: C
.int
) return Hostent_Access
;
235 function Nonreentrant_Getservbyname
236 (Name
: C
.char_array
;
237 Proto
: C
.char_array
) return Servent_Access
;
239 function Nonreentrant_Getservbyport
241 Proto
: C
.char_array
) return Servent_Access
;
243 procedure Initialize
;
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");
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");
266 end GNAT
.Sockets
.Thin
;