参照元†
- const char *lib
- const char *name
- const char *version
- int verbose
返り値†
void *snd_dlobj_cache_get(const char *lib, const char *name,
const char *version, int verbose)
{
struct list_head *p;
struct dlobj_cache *c;
void *func, *dlobj;
snd_dlobj_lock();
list_for_each(p, &pcm_dlobj_list) {
c = list_entry(p, struct dlobj_cache, list);
if (c->lib && lib && strcmp(c->lib, lib) != 0)
continue;
if (!c->lib && lib)
continue;
if (!lib && c->lib)
continue;
if (strcmp(c->name, name) == 0) {
c->refcnt++;
func = c->func;
snd_dlobj_unlock();
return func;
}
}
dlobj = snd_dlopen(lib, RTLD_NOW);
if (dlobj == NULL) {
if (verbose)
SNDERR("Cannot open shared library %s",
lib ? lib : "[builtin]");
snd_dlobj_unlock();
return NULL;
}
func = snd_dlsym(dlobj, name, version);
if (func == NULL) {
if (verbose)
SNDERR("symbol %s is not defined inside %s",
name, lib ? lib : "[builtin]");
goto __err;
}
c = malloc(sizeof(*c));
if (! c)
goto __err;
c->refcnt = 1;
c->lib = lib ? strdup(lib) : NULL;
c->name = strdup(name);
if ((lib && ! c->lib) || ! c->name) {
free((void *)c->name);
free((void *)c->lib);
free(c);
__err:
snd_dlclose(dlobj);
snd_dlobj_unlock();
return NULL;
}
c->dlobj = dlobj;
c->func = func;
list_add_tail(&c->list, &pcm_dlobj_list);
snd_dlobj_unlock();
return func;
}
コメント†