code.delx.au - pulseaudio/blob - src/pulsecore/hook-list.h

   1 #ifndef foohooklistfoo
   2 #define foohooklistfoo
   3
   4 /* $Id$ */
   5
   6 /***
   7   This file is part of PulseAudio.
   8
   9   PulseAudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU Lesser General Public License as
  11   published by the Free Software Foundation; either version 2 of the
  12   License, or (at your option) any later version.
  13
  14   PulseAudio is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public
  20   License along with PulseAudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #include <pulsecore/llist.h>
  26 #include <pulse/xmalloc.h>
  27 #include <pulsecore/gccmacro.h>
  28
  29 typedef struct pa_hook_slot pa_hook_slot;
  30 typedef struct pa_hook pa_hook;
  31
  32 typedef enum pa_hook_result {
  33     PA_HOOK_OK = 0,
  34     PA_HOOK_STOP = 1,
  35     PA_HOOK_CANCEL = -1
  36 } pa_hook_result_t;
  37
  38 typedef pa_hook_result_t (*pa_hook_cb_t)(void *data, void *userdata);
  39
  40 struct pa_hook_slot {
  41     int dead;
  42     pa_hook *hook;
  43     pa_hook_cb_t callback;
  44     void *userdata;
  45     PA_LLIST_FIELDS(pa_hook_slot);
  46 };
  47
  48 struct pa_hook {
  49     PA_LLIST_HEAD(pa_hook_slot, slots);
  50     pa_hook_slot *last;
  51     int firing, n_dead;
  52 };
  53
  54 void pa_hook_init(pa_hook *hook);
  55 void pa_hook_free(pa_hook *hook);
  56
  57 pa_hook_slot* pa_hook_connect(pa_hook *hook, pa_hook_cb_t, void *userdata);
  58 void pa_hook_slot_free(pa_hook_slot *slot);
  59
  60 pa_hook_result_t pa_hook_fire(pa_hook *hook, void *data);
  61
  62 #endif