/*****************************************************************************
* plugin.c : Low-level dynamic library handling
*****************************************************************************
* Copyright (C) 2001-2007 VLC authors and VideoLAN
*
* Authors: Sam Hocevar <sam@zoy.org>
* Ethan C. Baldridge <BaldridgeE@cadmus.com>
* Hans-Peter Jansen <hpj@urpla.net>
* Gildas Bazin <gbazin@videolan.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <vlc_common.h>
#include "modules/modules.h"
#include <sys/types.h>
#include <dlfcn.h>
#ifdef HAVE_VALGRIND_VALGRIND_H
# include <valgrind/valgrind.h>
#endif
void *vlc_dlopen(const char *path, bool lazy)
{
#if defined (RTLD_NOW)
const int flags = lazy ? RTLD_LAZY : RTLD_NOW;
#elif defined (DL_LAZY)
const int flags = DL_LAZY;
VLC_UNUSED(lazy);
#else
const int flags = 0;
VLC_UNUSED(lazy);
#endif
return dlopen (path, flags);
}
int vlc_dlclose(void *handle)
{
#if !defined(__SANITIZE_ADDRESS__)
#ifdef HAVE_VALGRIND_VALGRIND_H
if( RUNNING_ON_VALGRIND > 0 )
return 0; /* do not dlclose() so that we get proper stack traces */
#endif
int err = dlclose( handle );
assert(err == 0);
return err;
#else
(void) handle;
return 0;
#endif
}
void *vlc_dlsym(void *handle, const char *name)
{
return dlsym(handle, name);
}
char *vlc_dlerror(void)
{
const char *errmsg = dlerror();
/* XXX: This is not thread-safe at all. POSIX is helpless here. */
return (errmsg != NULL) ? strdup(errmsg) : NULL;
}
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