|
Packit |
4a16fb |
/**
|
|
Packit |
4a16fb |
* \file dlmisc.c
|
|
Packit |
4a16fb |
* \brief dynamic loader helpers
|
|
Packit |
4a16fb |
* \author Jaroslav Kysela <perex@perex.cz>
|
|
Packit |
4a16fb |
* \date 2001
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
* Dynamic loader helpers
|
|
Packit |
4a16fb |
*/
|
|
Packit |
4a16fb |
/*
|
|
Packit |
4a16fb |
* Dynamic loader helpers
|
|
Packit |
4a16fb |
* Copyright (c) 2000 by Jaroslav Kysela <perex@perex.cz>
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
* This library is free software; you can redistribute it and/or modify
|
|
Packit |
4a16fb |
* it under the terms of the GNU Lesser General Public License as
|
|
Packit |
4a16fb |
* published by the Free Software Foundation; either version 2.1 of
|
|
Packit |
4a16fb |
* the License, or (at your option) any later version.
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
* This program is distributed in the hope that it will be useful,
|
|
Packit |
4a16fb |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
4a16fb |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
Packit |
4a16fb |
* GNU Lesser General Public License for more details.
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
* You should have received a copy of the GNU Lesser General Public
|
|
Packit |
4a16fb |
* License along with this library; if not, write to the Free Software
|
|
Packit |
4a16fb |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
*/
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
#include "list.h"
|
|
Packit |
4a16fb |
#include "local.h"
|
|
Packit |
4a16fb |
#ifdef HAVE_LIBPTHREAD
|
|
Packit |
4a16fb |
#include <pthread.h>
|
|
Packit |
4a16fb |
#endif
|
|
Packit Service |
f36a15 |
#include <limits.h>
|
|
Packit Service |
f36a15 |
|
|
Packit Service |
f36a15 |
#if defined(HAVE_LIBDL) && defined(__GLIBC__) && !defined(__UCLIBC__)
|
|
Packit Service |
f36a15 |
#define DL_ORIGIN_AVAILABLE 1
|
|
Packit Service |
f36a15 |
#endif
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
#ifndef DOC_HIDDEN
|
|
Packit |
4a16fb |
#ifndef PIC
|
|
Packit |
4a16fb |
struct snd_dlsym_link *snd_dlsym_start = NULL;
|
|
Packit |
4a16fb |
#endif
|
|
Packit Service |
f36a15 |
#ifdef DL_ORIGIN_AVAILABLE
|
|
Packit Service |
f36a15 |
static int snd_libdir_plugin_dir_set = 0;
|
|
Packit Service |
f36a15 |
static char *snd_libdir_origin = NULL;
|
|
Packit Service |
f36a15 |
#endif
|
|
Packit Service |
f36a15 |
#endif
|
|
Packit Service |
f36a15 |
|
|
Packit Service |
f36a15 |
#if defined(DL_ORIGIN_AVAILABLE) && defined(HAVE_LIBPTHREAD)
|
|
Packit Service |
f36a15 |
static pthread_mutex_t snd_dlpath_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
Packit Service |
f36a15 |
|
|
Packit Service |
f36a15 |
static inline void snd_dlpath_lock(void)
|
|
Packit Service |
f36a15 |
{
|
|
Packit Service |
f36a15 |
pthread_mutex_lock(&snd_dlpath_mutex);
|
|
Packit Service |
f36a15 |
}
|
|
Packit Service |
f36a15 |
|
|
Packit Service |
f36a15 |
static inline void snd_dlpath_unlock(void)
|
|
Packit Service |
f36a15 |
{
|
|
Packit Service |
f36a15 |
pthread_mutex_unlock(&snd_dlpath_mutex);
|
|
Packit Service |
f36a15 |
}
|
|
Packit Service |
f36a15 |
#else
|
|
Packit Service |
f36a15 |
static inline void snd_dlpath_lock(void) {}
|
|
Packit Service |
f36a15 |
static inline void snd_dlpath_unlock(void) {}
|
|
Packit Service |
f36a15 |
#endif
|
|
Packit Service |
f36a15 |
|
|
Packit Service |
f36a15 |
/**
|
|
Packit Service |
f36a15 |
*
|
|
Packit Service |
f36a15 |
* \brief Compose the dynamic path
|
|
Packit Service |
f36a15 |
* \param path Returned path (string)
|
|
Packit Service |
f36a15 |
* \param path_len Returned path max size (with trailing zero)
|
|
Packit Service |
f36a15 |
* \param name Plugin name (relative)
|
|
Packit Service |
f36a15 |
* \return Zero on success, otherwise a negative error code
|
|
Packit Service |
f36a15 |
*/
|
|
Packit Service |
f36a15 |
int snd_dlpath(char *path, size_t path_len, const char *name)
|
|
Packit Service |
f36a15 |
{
|
|
Packit Service |
f36a15 |
#ifdef DL_ORIGIN_AVAILABLE
|
|
Packit Service |
f36a15 |
snd_dlpath_lock();
|
|
Packit Service |
f36a15 |
if (!snd_libdir_plugin_dir_set) {
|
|
Packit Service |
f36a15 |
struct link_map *links;
|
|
Packit Service |
f36a15 |
Dl_info info;
|
|
Packit Service |
f36a15 |
char origin[PATH_MAX];
|
|
Packit Service |
f36a15 |
if (dladdr1(&snd_dlpath, &info, (void**)&links, RTLD_DL_LINKMAP) == 0)
|
|
Packit Service |
f36a15 |
links = NULL;
|
|
Packit Service |
f36a15 |
if (links != NULL && dlinfo(links, RTLD_DI_ORIGIN, origin) == 0) {
|
|
Packit Service |
f36a15 |
snprintf(path, path_len, "%s/alsa-lib", origin);
|
|
Packit Service |
f36a15 |
if (access(path, X_OK) == 0)
|
|
Packit Service |
f36a15 |
snd_libdir_origin = strdup(origin);
|
|
Packit Service |
f36a15 |
}
|
|
Packit Service |
f36a15 |
snd_libdir_plugin_dir_set = 1;
|
|
Packit Service |
f36a15 |
}
|
|
Packit Service |
f36a15 |
if (snd_libdir_origin) {
|
|
Packit Service |
f36a15 |
snprintf(path, path_len, "%s/alsa-lib/%s", snd_libdir_origin, name);
|
|
Packit Service |
f36a15 |
} else {
|
|
Packit Service |
f36a15 |
snprintf(path, path_len, "%s/%s", ALSA_PLUGIN_DIR, name);
|
|
Packit Service |
f36a15 |
}
|
|
Packit Service |
f36a15 |
snd_dlpath_unlock();
|
|
Packit Service |
f36a15 |
#else
|
|
Packit Service |
f36a15 |
snprintf(path, path_len, "%s/%s", ALSA_PLUGIN_DIR, name);
|
|
Packit |
4a16fb |
#endif
|
|
Packit Service |
f36a15 |
return 0;
|
|
Packit Service |
f36a15 |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
/**
|
|
Packit |
4a16fb |
* \brief Opens a dynamic library - ALSA wrapper for \c dlopen.
|
|
Packit |
4a16fb |
* \param name name of the library, similar to \c dlopen.
|
|
Packit |
4a16fb |
* \param mode mode flags, similar to \c dlopen.
|
|
Packit |
4a16fb |
* \param errbuf a string buffer for the error message \c dlerror.
|
|
Packit |
4a16fb |
* \param errbuflen a length of the string buffer for the error message.
|
|
Packit |
4a16fb |
* \return Library handle if successful, otherwise \c NULL.
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
* This function can emulate dynamic linking for the static build of
|
|
Packit |
4a16fb |
* the alsa-lib library. In that case, \p name is set to \c NULL.
|
|
Packit |
4a16fb |
*/
|
|
Packit |
4a16fb |
#ifndef DOXYGEN
|
|
Packit |
4a16fb |
EXPORT_SYMBOL void *INTERNAL(snd_dlopen)(const char *name, int mode, char *errbuf, size_t errbuflen)
|
|
Packit |
4a16fb |
#else
|
|
Packit |
4a16fb |
void *snd_dlopen(const char *name, int mode, char *errbuf, size_t errbuflen)
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
#ifndef PIC
|
|
Packit |
4a16fb |
if (name == NULL)
|
|
Packit |
4a16fb |
return &snd_dlsym_start;
|
|
Packit |
4a16fb |
#else
|
|
Packit |
4a16fb |
#ifdef HAVE_LIBDL
|
|
Packit |
4a16fb |
if (name == NULL) {
|
|
Packit |
4a16fb |
static const char * self = NULL;
|
|
Packit |
4a16fb |
if (self == NULL) {
|
|
Packit |
4a16fb |
Dl_info dlinfo;
|
|
Packit |
4a16fb |
if (dladdr(snd_dlopen, &dlinfo) > 0)
|
|
Packit |
4a16fb |
self = dlinfo.dli_fname;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
name = self;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
#ifdef HAVE_LIBDL
|
|
Packit |
4a16fb |
/*
|
|
Packit |
4a16fb |
* Handle the plugin dir not being on the default dlopen search
|
|
Packit |
4a16fb |
* path, without resorting to polluting the entire system namespace
|
|
Packit |
4a16fb |
* via ld.so.conf.
|
|
Packit |
4a16fb |
*/
|
|
Packit |
4a16fb |
void *handle = NULL;
|
|
Packit Service |
f36a15 |
const char *filename = NULL;
|
|
Packit Service |
f36a15 |
char path[PATH_MAX];
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
if (name && name[0] != '/') {
|
|
Packit Service |
f36a15 |
if (snd_dlpath(path, sizeof(path), name) == 0) {
|
|
Packit Service |
f36a15 |
filename = path;
|
|
Packit |
4a16fb |
handle = dlopen(filename, mode);
|
|
Packit |
4a16fb |
if (!handle) {
|
|
Packit |
4a16fb |
/* if the filename exists and cannot be opened */
|
|
Packit |
4a16fb |
/* return immediately */
|
|
Packit |
4a16fb |
if (access(filename, X_OK) == 0)
|
|
Packit |
4a16fb |
goto errpath;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
if (!handle) {
|
|
Packit Service |
f36a15 |
filename = name;
|
|
Packit |
4a16fb |
handle = dlopen(name, mode);
|
|
Packit |
4a16fb |
if (!handle)
|
|
Packit |
4a16fb |
goto errpath;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
return handle;
|
|
Packit |
4a16fb |
errpath:
|
|
Packit |
4a16fb |
if (errbuf)
|
|
Packit |
4a16fb |
snprintf(errbuf, errbuflen, "%s: %s", filename, dlerror());
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
return NULL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
#ifndef DOXYGEN
|
|
Packit |
4a16fb |
void *INTERNAL(snd_dlopen_old)(const char *name, int mode)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
return INTERNAL(snd_dlopen)(name, mode, NULL, 0);
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
use_symbol_version(__snd_dlopen_old, snd_dlopen, ALSA_0.9);
|
|
Packit |
4a16fb |
use_default_symbol_version(__snd_dlopen, snd_dlopen, ALSA_1.1.6);
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
/**
|
|
Packit |
4a16fb |
* \brief Closes a dynamic library - ALSA wrapper for \c dlclose.
|
|
Packit |
4a16fb |
* \param handle Library handle, similar to \c dlclose.
|
|
Packit |
4a16fb |
* \return Zero if successful, otherwise an error code.
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
* This function can emulate dynamic linking for the static build of
|
|
Packit |
4a16fb |
* the alsa-lib library.
|
|
Packit |
4a16fb |
*/
|
|
Packit |
4a16fb |
int snd_dlclose(void *handle)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
#ifndef PIC
|
|
Packit |
4a16fb |
if (handle == &snd_dlsym_start)
|
|
Packit |
4a16fb |
return 0;
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
#ifdef HAVE_LIBDL
|
|
Packit |
4a16fb |
return dlclose(handle);
|
|
Packit |
4a16fb |
#else
|
|
Packit |
4a16fb |
return 0;
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
/**
|
|
Packit |
4a16fb |
* \brief Verifies a dynamically loaded symbol.
|
|
Packit |
4a16fb |
* \param handle Library handle, similar to \c dlsym.
|
|
Packit |
4a16fb |
* \param name Symbol name.
|
|
Packit |
4a16fb |
* \param version Version of the symbol.
|
|
Packit |
4a16fb |
* \return Zero is successful, otherwise a negative error code.
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
* This function checks that the symbol with the version appended to its name
|
|
Packit |
4a16fb |
* does exist in the library.
|
|
Packit |
4a16fb |
*/
|
|
Packit |
4a16fb |
static int snd_dlsym_verify(void *handle, const char *name, const char *version)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
#ifdef HAVE_LIBDL
|
|
Packit |
4a16fb |
int res;
|
|
Packit |
4a16fb |
char *vname;
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
if (handle == NULL)
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
vname = alloca(1 + strlen(name) + strlen(version) + 1);
|
|
Packit |
4a16fb |
if (vname == NULL)
|
|
Packit |
4a16fb |
return -ENOMEM;
|
|
Packit |
4a16fb |
vname[0] = '_';
|
|
Packit |
4a16fb |
strcpy(vname + 1, name);
|
|
Packit |
4a16fb |
strcat(vname, version);
|
|
Packit |
4a16fb |
res = dlsym(handle, vname) == NULL ? -ENOENT : 0;
|
|
Packit |
4a16fb |
// printf("dlsym verify: %i, vname = '%s'\n", res, vname);
|
|
Packit |
4a16fb |
if (res < 0)
|
|
Packit |
4a16fb |
SNDERR("unable to verify version for symbol %s", name);
|
|
Packit |
4a16fb |
return res;
|
|
Packit |
4a16fb |
#else
|
|
Packit |
4a16fb |
return 0;
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
/**
|
|
Packit |
4a16fb |
* \brief Resolves a symbol from a dynamic library - ALSA wrapper for \c dlsym.
|
|
Packit |
4a16fb |
* \param handle Library handle, similar to \c dlsym.
|
|
Packit |
4a16fb |
* \param name Symbol name.
|
|
Packit |
4a16fb |
* \param version Version of the symbol.
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
* This function can emulate dynamic linking for the static build of
|
|
Packit |
4a16fb |
* the alsa-lib library.
|
|
Packit |
4a16fb |
*
|
|
Packit |
4a16fb |
* This special version of the \c dlsym function checks also the version
|
|
Packit |
4a16fb |
* of the symbol. A versioned symbol should be defined using the
|
|
Packit |
4a16fb |
* #SND_DLSYM_BUILD_VERSION macro.
|
|
Packit |
4a16fb |
*/
|
|
Packit |
4a16fb |
void *snd_dlsym(void *handle, const char *name, const char *version)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
int err;
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
#ifndef PIC
|
|
Packit |
4a16fb |
if (handle == &snd_dlsym_start) {
|
|
Packit |
4a16fb |
/* it's the funny part: */
|
|
Packit |
4a16fb |
/* we are looking for a symbol in a static library */
|
|
Packit |
4a16fb |
struct snd_dlsym_link *link = snd_dlsym_start;
|
|
Packit |
4a16fb |
while (link) {
|
|
Packit |
4a16fb |
if (!strcmp(name, link->dlsym_name))
|
|
Packit |
4a16fb |
return (void *)link->dlsym_ptr;
|
|
Packit |
4a16fb |
link = link->next;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
return NULL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
#ifdef HAVE_LIBDL
|
|
Packit |
4a16fb |
#ifdef VERSIONED_SYMBOLS
|
|
Packit |
4a16fb |
if (version) {
|
|
Packit |
4a16fb |
err = snd_dlsym_verify(handle, name, version);
|
|
Packit |
4a16fb |
if (err < 0)
|
|
Packit |
4a16fb |
return NULL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
return dlsym(handle, name);
|
|
Packit |
4a16fb |
#else
|
|
Packit |
4a16fb |
return NULL;
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
/*
|
|
Packit |
4a16fb |
* dlobj cache
|
|
Packit |
4a16fb |
*/
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
#ifndef DOC_HIDDEN
|
|
Packit |
4a16fb |
struct dlobj_cache {
|
|
Packit |
4a16fb |
const char *lib;
|
|
Packit |
4a16fb |
const char *name;
|
|
Packit |
4a16fb |
void *dlobj;
|
|
Packit |
4a16fb |
void *func;
|
|
Packit |
4a16fb |
unsigned int refcnt;
|
|
Packit |
4a16fb |
struct list_head list;
|
|
Packit |
4a16fb |
};
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
#ifdef HAVE_LIBPTHREAD
|
|
Packit |
4a16fb |
static pthread_mutex_t snd_dlobj_mutex = PTHREAD_MUTEX_INITIALIZER;
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
static inline void snd_dlobj_lock(void)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
pthread_mutex_lock(&snd_dlobj_mutex);
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
static inline void snd_dlobj_unlock(void)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
pthread_mutex_unlock(&snd_dlobj_mutex);
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
#else
|
|
Packit |
4a16fb |
static inline void snd_dlobj_lock(void) {}
|
|
Packit |
4a16fb |
static inline void snd_dlobj_unlock(void) {}
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
static LIST_HEAD(pcm_dlobj_list);
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
static struct dlobj_cache *
|
|
Packit |
4a16fb |
snd_dlobj_cache_get0(const char *lib, const char *name,
|
|
Packit |
4a16fb |
const char *version, int verbose)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
struct list_head *p;
|
|
Packit |
4a16fb |
struct dlobj_cache *c;
|
|
Packit |
4a16fb |
void *func, *dlobj;
|
|
Packit |
4a16fb |
char errbuf[256];
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
list_for_each(p, &pcm_dlobj_list) {
|
|
Packit |
4a16fb |
c = list_entry(p, struct dlobj_cache, list);
|
|
Packit |
4a16fb |
if (c->lib && lib && strcmp(c->lib, lib) != 0)
|
|
Packit |
4a16fb |
continue;
|
|
Packit |
4a16fb |
if (!c->lib && lib)
|
|
Packit |
4a16fb |
continue;
|
|
Packit |
4a16fb |
if (!lib && c->lib)
|
|
Packit |
4a16fb |
continue;
|
|
Packit |
4a16fb |
if (strcmp(c->name, name) == 0) {
|
|
Packit |
4a16fb |
c->refcnt++;
|
|
Packit |
4a16fb |
return c;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
errbuf[0] = '\0';
|
|
Packit |
4a16fb |
dlobj = INTERNAL(snd_dlopen)(lib, RTLD_NOW,
|
|
Packit |
4a16fb |
verbose ? errbuf : 0,
|
|
Packit |
4a16fb |
verbose ? sizeof(errbuf) : 0);
|
|
Packit |
4a16fb |
if (dlobj == NULL) {
|
|
Packit |
4a16fb |
if (verbose)
|
|
Packit |
4a16fb |
SNDERR("Cannot open shared library %s (%s)",
|
|
Packit |
4a16fb |
lib ? lib : "[builtin]",
|
|
Packit |
4a16fb |
errbuf);
|
|
Packit |
4a16fb |
return NULL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
func = snd_dlsym(dlobj, name, version);
|
|
Packit |
4a16fb |
if (func == NULL) {
|
|
Packit |
4a16fb |
if (verbose)
|
|
Packit |
4a16fb |
SNDERR("symbol %s is not defined inside %s",
|
|
Packit |
4a16fb |
name, lib ? lib : "[builtin]");
|
|
Packit |
4a16fb |
goto __err;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
c = malloc(sizeof(*c));
|
|
Packit |
4a16fb |
if (! c)
|
|
Packit |
4a16fb |
goto __err;
|
|
Packit |
4a16fb |
c->refcnt = 1;
|
|
Packit |
4a16fb |
c->lib = lib ? strdup(lib) : NULL;
|
|
Packit |
4a16fb |
c->name = strdup(name);
|
|
Packit |
4a16fb |
if ((lib && ! c->lib) || ! c->name) {
|
|
Packit |
4a16fb |
free((void *)c->name);
|
|
Packit |
4a16fb |
free((void *)c->lib);
|
|
Packit |
4a16fb |
free(c);
|
|
Packit |
4a16fb |
__err:
|
|
Packit |
4a16fb |
snd_dlclose(dlobj);
|
|
Packit |
4a16fb |
snd_dlobj_unlock();
|
|
Packit |
4a16fb |
return NULL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
c->dlobj = dlobj;
|
|
Packit |
4a16fb |
c->func = func;
|
|
Packit |
4a16fb |
list_add_tail(&c->list, &pcm_dlobj_list);
|
|
Packit |
4a16fb |
return c;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
void *snd_dlobj_cache_get(const char *lib, const char *name,
|
|
Packit |
4a16fb |
const char *version, int verbose)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
struct dlobj_cache *c;
|
|
Packit |
4a16fb |
void *func = NULL;
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
snd_dlobj_lock();
|
|
Packit |
4a16fb |
c = snd_dlobj_cache_get0(lib, name, version, verbose);
|
|
Packit |
4a16fb |
if (c)
|
|
Packit |
4a16fb |
func = c->func;
|
|
Packit |
4a16fb |
snd_dlobj_unlock();
|
|
Packit |
4a16fb |
return func;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
void *snd_dlobj_cache_get2(const char *lib, const char *name,
|
|
Packit |
4a16fb |
const char *version, int verbose)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
struct dlobj_cache *c;
|
|
Packit |
4a16fb |
void *func = NULL;
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
snd_dlobj_lock();
|
|
Packit |
4a16fb |
c = snd_dlobj_cache_get0(lib, name, version, verbose);
|
|
Packit |
4a16fb |
if (c) {
|
|
Packit |
4a16fb |
func = c->func;
|
|
Packit |
4a16fb |
/* double reference */
|
|
Packit |
4a16fb |
c->refcnt++;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
snd_dlobj_unlock();
|
|
Packit |
4a16fb |
return func;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
int snd_dlobj_cache_put(void *func)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
struct list_head *p;
|
|
Packit |
4a16fb |
struct dlobj_cache *c;
|
|
Packit |
4a16fb |
unsigned int refcnt;
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
if (!func)
|
|
Packit |
4a16fb |
return -ENOENT;
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
snd_dlobj_lock();
|
|
Packit |
4a16fb |
list_for_each(p, &pcm_dlobj_list) {
|
|
Packit |
4a16fb |
c = list_entry(p, struct dlobj_cache, list);
|
|
Packit |
4a16fb |
if (c->func == func) {
|
|
Packit |
4a16fb |
refcnt = c->refcnt;
|
|
Packit |
4a16fb |
if (c->refcnt > 0)
|
|
Packit |
4a16fb |
c->refcnt--;
|
|
Packit |
4a16fb |
snd_dlobj_unlock();
|
|
Packit |
4a16fb |
return refcnt == 1 ? 0 : -EINVAL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
snd_dlobj_unlock();
|
|
Packit |
4a16fb |
return -ENOENT;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
void snd_dlobj_cache_cleanup(void)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
struct list_head *p, *npos;
|
|
Packit |
4a16fb |
struct dlobj_cache *c;
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
snd_dlobj_lock();
|
|
Packit |
4a16fb |
list_for_each_safe(p, npos, &pcm_dlobj_list) {
|
|
Packit |
4a16fb |
c = list_entry(p, struct dlobj_cache, list);
|
|
Packit |
4a16fb |
if (c->refcnt)
|
|
Packit |
4a16fb |
continue;
|
|
Packit |
4a16fb |
list_del(p);
|
|
Packit |
4a16fb |
snd_dlclose(c->dlobj);
|
|
Packit |
4a16fb |
free((void *)c->name); /* shut up gcc warning */
|
|
Packit |
4a16fb |
free((void *)c->lib); /* shut up gcc warning */
|
|
Packit |
4a16fb |
free(c);
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
snd_dlobj_unlock();
|
|
Packit Service |
f36a15 |
#ifdef DL_ORIGIN_AVAILABLE
|
|
Packit Service |
f36a15 |
snd_dlpath_lock();
|
|
Packit Service |
f36a15 |
snd_libdir_plugin_dir_set = 0;
|
|
Packit Service |
f36a15 |
free(snd_libdir_origin);
|
|
Packit Service |
f36a15 |
snd_libdir_origin = NULL;
|
|
Packit Service |
f36a15 |
snd_dlpath_unlock();
|
|
Packit Service |
f36a15 |
#endif
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
#endif
|