4 This file is part of PulseAudio.
6 Copyright 2006 Lennart Poettering
8 PulseAudio is free software; you can redistribute it and/or modify
9 it under the terms of the GNU Lesser General Public License as
10 published by the Free Software Foundation; either version 2 of the
11 License, or (at your option) any later version.
13 PulseAudio is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public
19 License along with PulseAudio; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
24 #include <pulsecore/hook-list.h>
26 void pa_hook_init(pa_hook *hook, void *data) {
29 PA_LLIST_HEAD_INIT(pa_hook_slot, hook->slots);
31 hook->n_dead = hook->firing = 0;
35 static void slot_free(pa_hook *hook, pa_hook_slot *slot) {
39 if (hook->last == slot)
40 hook->last = slot->prev;
42 PA_LLIST_REMOVE(pa_hook_slot, hook->slots, slot);
47 void pa_hook_free(pa_hook *hook) {
49 assert(!hook->firing);
52 slot_free(hook, hook->slots);
54 pa_hook_init(hook, NULL);
57 pa_hook_slot* pa_hook_connect(pa_hook *hook, pa_hook_cb_t cb, void *data) {
62 slot = pa_xnew(pa_hook_slot, 1);
68 PA_LLIST_INSERT_AFTER(pa_hook_slot, hook->slots, hook->last, slot);
74 void pa_hook_slot_free(pa_hook_slot *slot) {
78 if (slot->hook->firing > 0) {
82 slot_free(slot->hook, slot);
85 pa_hook_result_t pa_hook_fire(pa_hook *hook, void *data) {
86 pa_hook_slot *slot, *next;
87 pa_hook_result_t result = PA_HOOK_OK;
93 for (slot = hook->slots; slot; slot = slot->next) {
97 if ((result = slot->callback(hook->data, data, slot->data)) != PA_HOOK_OK)
103 for (slot = hook->slots; hook->n_dead > 0 && slot; slot = next) {
107 slot_free(hook, slot);