1 /* Copyright (C) 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
20 #include <bits/libc-lock.h>
25 /*******************************************************************\
26 |* Here we assume several symbols to be defined: *|
28 |* LOOKUP_TYPE - the return type of the function *|
30 |* GETFUNC_NAME - name of the non-reentrant getXXXent function *|
32 |* BUFLEN - size of static buffer *|
34 |* Optionally the following vars can be defined: *|
36 |* NEED_H_ERRNO - an extra parameter will be passed to point to *|
37 |* the global `h_errno' variable. *|
39 \*******************************************************************/
41 /* To make the real sources a bit prettier. */
42 #define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME)
43 #define APPEND_R(name) APPEND_R1 (name)
44 #define APPEND_R1(name) name##_r
45 #define INTERNAL(name) INTERNAL1 (name)
46 #define INTERNAL1(name) __##name
48 /* Sometimes we need to store error codes in the `h_errno' variable. */
50 # define H_ERRNO_PARM , int *h_errnop
51 # define H_ERRNO_VAR , &h_errno
57 /* Prototype of the reentrant version. */
58 extern int INTERNAL (REENTRANT_GETNAME
) (LOOKUP_TYPE
*resbuf
, char *buffer
,
59 size_t buflen
, LOOKUP_TYPE
**result
62 /* We need to protect the dynamic buffer handling. */
63 __libc_lock_define_initialized (static, lock
);
65 /* This points to the static buffer used. */
72 static size_t buffer_size
;
73 static LOOKUP_TYPE resbuf
;
78 __libc_lock_lock (lock
);
83 buffer
= malloc (buffer_size
);
87 && INTERNAL (REENTRANT_GETNAME
) (&resbuf
, buffer
, buffer_size
, &result
88 H_ERRNO_VAR
) == ERANGE
90 && h_errno
== NETDB_INTERNAL
95 buffer_size
+= BUFLEN
;
96 new_buf
= realloc (buffer
, buffer_size
);
99 /* We are out of memory. Free the current buffer so that the
100 process gets a chance for a normal termination. */
111 /* Release lock. Preserve error value. */
113 __libc_lock_unlock (lock
);
120 /* Free all resources if necessary. */
121 static void __attribute__ ((unused
))
127 text_set_element (__libc_subfreeres
, free_mem
);