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alisp: remove alloca() from FA_card_info()

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Both of alloca() and automatic variables keeps storages on stack, while
the former generates more instructions than the latter. It's better to use
the latter if the size of storage is computable at pre-compile or compile
time; i.e. just for structures.

This commit obsolete usages of alloca() with automatic variables.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2016-07-14 23:07:46 +09:00 • committed by Takashi Iwai
parent 68e659bb23
commit 0198c850ab
1 changed files with 8 additions and 9 deletions
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17
src/alisp/alisp_snd.c
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@ -444,7 +444,7 @@ static struct alisp_object * FA_card_info(struct alisp_instance * instance, stru
{
snd_ctl_t *handle;
struct alisp_object * lexpr, * p1;
snd_ctl_card_info_t * info;
snd_ctl_card_info_t info = {0};
int err;
p1 = eval(instance, car(args));
@ -453,17 +453,16 @@ static struct alisp_object * FA_card_info(struct alisp_instance * instance, stru
handle = (snd_ctl_t *)get_ptr(instance, p1, item->prefix);
if (handle == NULL)
return &alsa_lisp_nil;
snd_ctl_card_info_alloca(&info);
err = snd_ctl_card_info(handle, info);
err = snd_ctl_card_info(handle, &info);
lexpr = new_lexpr(instance, err);
if (err < 0)
return lexpr;
p1 = add_cons(instance, lexpr->value.c.cdr, 0, "id", new_string(instance, snd_ctl_card_info_get_id(info)));
p1 = add_cons(instance, p1, 1, "driver", new_string(instance, snd_ctl_card_info_get_driver(info)));
p1 = add_cons(instance, p1, 1, "name", new_string(instance, snd_ctl_card_info_get_name(info)));
p1 = add_cons(instance, p1, 1, "longname", new_string(instance, snd_ctl_card_info_get_longname(info)));
p1 = add_cons(instance, p1, 1, "mixername", new_string(instance, snd_ctl_card_info_get_mixername(info)));
p1 = add_cons(instance, p1, 1, "components", new_string(instance, snd_ctl_card_info_get_components(info)));
p1 = add_cons(instance, lexpr->value.c.cdr, 0, "id", new_string(instance, snd_ctl_card_info_get_id(&info)));
p1 = add_cons(instance, p1, 1, "driver", new_string(instance, snd_ctl_card_info_get_driver(&info)));
p1 = add_cons(instance, p1, 1, "name", new_string(instance, snd_ctl_card_info_get_name(&info)));
p1 = add_cons(instance, p1, 1, "longname", new_string(instance, snd_ctl_card_info_get_longname(&info)));
p1 = add_cons(instance, p1, 1, "mixername", new_string(instance, snd_ctl_card_info_get_mixername(&info)));
p1 = add_cons(instance, p1, 1, "components", new_string(instance, snd_ctl_card_info_get_components(&info)));
if (p1 == NULL) {
delete_tree(instance, lexpr);
return NULL;