#ifndef foohooklistfoo
#define foohooklistfoo
-/* $Id$ */
-
/***
This file is part of PulseAudio.
-
+
+ Copyright 2006 Lennart Poettering
+
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
+ published by the Free Software Foundation; either version 2.1 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.
***/
-/* Some macro voodoo to implement a type safe hook list */
-
#include <pulsecore/llist.h>
-#include <pulse/xmalloc.h>
-#include <pulse/cdecl.h>
+
+typedef struct pa_hook_slot pa_hook_slot;
+typedef struct pa_hook pa_hook;
typedef enum pa_hook_result {
PA_HOOK_OK = 0,
PA_HOOK_CANCEL = -1
} pa_hook_result_t;
-#define PA_HOOK_DECLARE(name, arg1, arg2) \
-typedef pa_hook_result_t (*pa_hook__##name##__func_t)(arg1 a, arg2 b, void *userdata); \
-\
-typedef struct pa_hook__##name##__func_info pa_hook__##name##__func_info; \
-struct pa_hook__##name##__func_info { \
- int dead; \
- pa_hook__##name##__func_t func; \
- void *userdata; \
- PA_LLIST_FIELDS(pa_hook__##name##__func_info); \
-}; \
-PA_GCC_UNUSED static void pa_hook__##name##__free_one( \
- pa_hook__##name##__func_info **head, \
- pa_hook__##name##__func_info *i) { \
- PA_LLIST_REMOVE(pa_hook__##name##__func_info, *head, i); \
- pa_xfree(i); \
-} \
-PA_GCC_UNUSED static void pa_hook__##name##__free_all( \
- pa_hook__##name##__func_info **head) { \
- while (*head) \
- pa_hook__##name##__free_one(head, *head); \
-} \
-PA_GCC_UNUSED static void pa_hook__##name##__mark_dead( \
- pa_hook__##name##__func_info *i, \
- pa_hook__##name##__func_t func, \
- void *userdata) { \
- for (; i; i = i->next) { \
- if (i->func != func || i->userdata != userdata) \
- continue; \
- i->dead = 1; \
- break; \
- } \
-} \
-PA_GCC_UNUSED static void pa_hook__##name##__append( \
- pa_hook__##name##__func_info **head, \
- pa_hook__##name##__func_t func, \
- void *userdata) { \
- pa_hook__##name##__func_info *i = pa_xnew(pa_hook__##name##__func_info, 1); \
- i->dead = 0; \
- i->func = func; \
- i->userdata = userdata; \
- PA_LLIST_PREPEND(pa_hook__##name##__func_info, *head, i); \
-} \
-PA_GCC_UNUSED static pa_hook_result_t pa_hook__##name##__execute ( \
- pa_hook__##name##__func_info **head, \
- arg1 a, \
- arg2 b) { \
- pa_hook__##name##__func_info *i, *n; \
- pa_hook_result_t ret = PA_HOOK_OK; \
- for (i = *head; i; i = i->next) { \
- if ((ret = i->func(a, b, i->userdata)) != PA_HOOK_OK) \
- break; \
- } \
- for (i = *head; i; i = n) { \
- n = i->next; \
- if (i->dead) \
- pa_hook__##name##__free_one(head, i); \
- } \
- return ret; \
-}\
-void pa_hook__##name##__nowarn(void)
-
-
-#define PA_HOOK_HEAD(name, head) \
-pa_hook__##name##__func_info *head;
-
-#define PA_HOOK_HEAD_INIT(name, head) \
-(head) = NULL
-
-#define PA_HOOK_EXECUTE(name, head, arg1, arg2) \
-pa_hook__##name##__execute(&(head), arg1, arg2)
-
-#define PA_HOOK_APPEND(name, head, func, userdata) \
-pa_hook__##name##__append(&(head), func, userdata)
-
-#define PA_HOOK_REMOVE(name, head, func, userdata) \
-pa_hook__##name##__mark_dead(head, func, userdata)
-
-#define PA_HOOK_FREE(name, head) \
-pa_hook__##name##__free_all(&(head))
+typedef enum pa_hook_priority {
+ PA_HOOK_EARLY = -100,
+ PA_HOOK_NORMAL = 0,
+ PA_HOOK_LATE = 100
+} pa_hook_priority_t;
+
+typedef pa_hook_result_t (*pa_hook_cb_t)(
+ void *hook_data,
+ void *call_data,
+ void *slot_data);
+
+struct pa_hook_slot {
+ bool dead;
+ pa_hook *hook;
+ pa_hook_priority_t priority;
+ pa_hook_cb_t callback;
+ void *data;
+ PA_LLIST_FIELDS(pa_hook_slot);
+};
+
+struct pa_hook {
+ PA_LLIST_HEAD(pa_hook_slot, slots);
+ int n_firing, n_dead;
+
+ void *data;
+};
+
+void pa_hook_init(pa_hook *hook, void *data);
+void pa_hook_done(pa_hook *hook);
+
+pa_hook_slot* pa_hook_connect(pa_hook *hook, pa_hook_priority_t prio, pa_hook_cb_t cb, void *data);
+void pa_hook_slot_free(pa_hook_slot *slot);
+
+pa_hook_result_t pa_hook_fire(pa_hook *hook, void *data);
+
+bool pa_hook_is_firing(pa_hook *hook);
#endif