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authorLennart Poettering <lennart@poettering.net>2006-08-13 01:43:34 +0000
committerLennart Poettering <lennart@poettering.net>2006-08-13 01:43:34 +0000
commit281125c72767713d6294ac7094f3bf7bde47a1e3 (patch)
tree713e700723f22d3d6eeb4b8cd17f942a6ecd87d9 /src/pulsecore/hook-list.c
parent2622b0ca9eae2ffb18caed2b54b4e25325bed702 (diff)
rework hook list stuff again, and replace macros with real functins. We loose type safety but things are much cleaner now
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1234 fefdeb5f-60dc-0310-8127-8f9354f1896f
Diffstat (limited to 'src/pulsecore/hook-list.c')
-rw-r--r--src/pulsecore/hook-list.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/src/pulsecore/hook-list.c b/src/pulsecore/hook-list.c
new file mode 100644
index 00000000..14ab8e89
--- /dev/null
+++ b/src/pulsecore/hook-list.c
@@ -0,0 +1,111 @@
+/* $Id$ */
+
+/***
+ This file is part of PulseAudio.
+
+ PulseAudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ PulseAudio is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with PulseAudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+#include <pulsecore/hook-list.h>
+
+void pa_hook_init(pa_hook *hook) {
+ assert(hook);
+
+ PA_LLIST_HEAD_INIT(pa_hook_slots, hook->slots);
+ hook->last = NULL;
+ hook->n_dead = hook->firing = 0;
+}
+
+static void slot_free(pa_hook *hook, pa_hook_slot *slot) {
+ assert(hook);
+ assert(slot);
+
+ if (hook->last == slot)
+ hook->last = slot->prev;
+
+ PA_LLIST_REMOVE(pa_hook_slot, hook->slots, slot);
+
+ pa_xfree(slot);
+}
+
+void pa_hook_free(pa_hook *hook) {
+ assert(hook);
+ assert(!hook->firing);
+
+ while (hook->slots)
+ slot_free(hook, hook->slots);
+
+ pa_hook_init(hook);
+}
+
+pa_hook_slot* pa_hook_connect(pa_hook *hook, pa_hook_cb_t cb, void *userdata) {
+ pa_hook_slot *slot;
+
+ assert(cb);
+
+ slot = pa_xnew(pa_hook_slot, 1);
+ slot->hook = hook;
+ slot->dead = 0;
+ slot->callback = cb;
+ slot->userdata = userdata;
+
+ PA_LLIST_INSERT_AFTER(pa_hook_slot, hook->slots, hook->last, slot);
+ hook->last = slot;
+
+ return slot;
+}
+
+void pa_hook_slot_free(pa_hook_slot *slot) {
+ assert(slot);
+ assert(!slot->dead);
+
+ if (slot->hook->firing > 0) {
+ slot->dead = 1;
+ slot->hook->n_dead++;
+ } else
+ slot_free(slot->hook, slot);
+}
+
+pa_hook_result_t pa_hook_fire(pa_hook *hook, void *data) {
+ pa_hook_slot *slot, *next;
+ pa_hook_result_t result = PA_HOOK_OK;
+
+ assert(hook);
+
+ hook->firing ++;
+
+ for (slot = hook->slots; slot; slot = slot->next) {
+ if (slot->dead)
+ continue;
+
+ if ((result = slot->callback(data, slot->userdata)) != PA_HOOK_OK)
+ break;
+ }
+
+ hook->firing --;
+
+ for (slot = hook->slots; hook->n_dead > 0 && slot; slot = next) {
+ next = slot->next;
+
+ if (slot->dead) {
+ slot_free(hook, slot);
+ hook->n_dead--;
+ }
+ }
+
+ return result;
+}
+