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Support dl-object cache

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Added the support of dl-object caches for PCM plugins.
This commit is contained in:
Takashi Iwai 2005-02-14 15:09:09 +00:00
parent 08fc630594
commit d8f7de1b16
5 changed files with 93 additions and 3 deletions
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68
src/dlmisc.c
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@ -29,6 +29,7 @@
#define _GNU_SOURCE
#include <dlfcn.h>
#include "list.h"
#include "local.h"
#ifndef DOC_HIDDEN
@ -143,3 +144,70 @@ void *snd_dlsym(void *handle, const char *name, const char *version)
return NULL;
return dlsym(handle, name);
}
/*
* dlobj cache
*
* FIXME: add reference counter and proper locking
*/
struct dlobj_cache {
const char *name;
void *obj;
void *func;
struct list_head list;
};
static LIST_HEAD(pcm_dlobj_list);
void *snd_dlobj_cache_lookup(const char *name)
{
struct list_head *p;
struct dlobj_cache *c;
list_for_each(p, &pcm_dlobj_list) {
c = list_entry(p, struct dlobj_cache, list);
if (strcmp(c->name, name) == 0)
return c->func;
}
return NULL;
}
int snd_dlobj_cache_add(const char *name, void *dlobj, void *open_func)
{
struct list_head *p;
struct dlobj_cache *c;
list_for_each(p, &pcm_dlobj_list) {
c = list_entry(p, struct dlobj_cache, list);
if (strcmp(c->name, name) == 0)
return 0; /* already exists */
}
c = malloc(sizeof(*c));
if (! c)
return -ENOMEM;
c->name = strdup(name);
if (! c->name) {
free(c);
return -ENOMEM;
}
c->obj = dlobj;
c->func = open_func;
list_add_tail(&c->list, &pcm_dlobj_list);
return 0;
}
void snd_dlobj_cache_cleanup(void)
{
struct list_head *p;
struct dlobj_cache *c;
while (! list_empty(&pcm_dlobj_list)) {
p = pcm_dlobj_list.next;
c = list_entry(p, struct dlobj_cache, list);
list_del(p);
snd_dlclose(c->obj);
free(c->name);
free(c);
}
}