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Added symbol versioning for dlsym-callbacks.

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Removed snd_config_refer_load from confmisc.c and pcm.c.
This commit is contained in:
Jaroslav Kysela 2001-08-15 12:12:16 +00:00
parent 36a2810081
commit b45c08611c
43 changed files with 184 additions and 137 deletions
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src/dlmisc.c Normal file
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/**
* \file dlmisc.c
* \brief dynamic loader helpers
* \author Jaroslav Kysela <perex@suse.cz>
* \date 2001
*
* Dynamic loader helpers
*/
/*
* Dynamic loader helpers
* Copyright (c) 2000 by Jaroslav Kysela <perex@suse.cz>
*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <dlfcn.h>
#include "local.h"
/**
* \brief Verify dynamically loaded symbol
* \param handle dlopen handle
* \param name name of symbol
* \param version version of symbol
* \return zero is success, otherwise a negative error code
*/
int snd_dlsym_verify(void *handle, const char *name, const char *version)
{
int res;
char *vname;
if (handle == NULL)
return -EINVAL;
vname = alloca(1 + strlen(name) + strlen(version) + 1);
vname[0] = '_';
strcpy(vname + 1, name);
strcat(vname, version);
res = dlsym(handle, vname) == NULL ? -ENOENT : 0;
printf("dlsym verify: %i, vname = '%s'\n", res, vname);
if (res < 0)
SNDERR("unable to verify version for symbol %s", name);
return res;
}