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[glibc.git] / dlfcn / dlvsym.c
blob62415feaac79fc1f5abff0c25638488af9f84d83
1 /* Look up a versioned symbol in a shared object loaded by `dlopen'.
2 Copyright (C) 1995, 96, 97, 98, 99, 2000 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <dlfcn.h>
21 #include <stddef.h>
23 struct dlvsym_args
25 /* The arguments to dlvsym_doit. */
26 void *handle;
27 const char *name;
28 const char *version;
29 void *who;
31 /* The return values of dlvsym_doit. */
32 void *sym;
36 static void
37 dlvsym_doit (void *a)
39 struct dlvsym_args *args = (struct dlvsym_args *)a;
41 args->sym = _dl_vsym (args->handle, args->name, args->version, args->who);
44 void *
45 __dlvsym (void *handle, const char *name, const char *version_str)
47 struct dlvsym_args args;
49 args.handle = handle;
50 args.name = name;
51 args.who = RETURN_ADDRESS (0);
52 args.version = version_str;
54 return (_dlerror_run (dlvsym_doit, &args) ? NULL : args.sym);
56 weak_alias (__dlvsym, dlvsym)