code.delx.au - pulseaudio/blob - polyp/mainloop-api.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   polypaudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   along with polypaudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <assert.h>
  27 #include <stdlib.h>
  28
  29 #include "mainloop-api.h"
  30 #include "xmalloc.h"
  31
  32 struct once_info {
  33     void (*callback)(struct pa_mainloop_api*m, void *userdata);
  34     void *userdata;
  35 };
  36
  37 static void once_callback(struct pa_mainloop_api *m, struct pa_defer_event *e, void *userdata) {
  38     struct once_info *i = userdata;
  39     assert(m && i && i->callback);
  40
  41     i->callback(m, i->userdata);
  42
  43     assert(m->defer_free);
  44     m->defer_free(e);
  45 }
  46
  47 static void free_callback(struct pa_mainloop_api *m, struct pa_defer_event *e, void *userdata) {
  48     struct once_info *i = userdata;
  49     assert(m && i);
  50     pa_xfree(i);
  51 }
  52
  53 void pa_mainloop_api_once(struct pa_mainloop_api* m, void (*callback)(struct pa_mainloop_api *m, void *userdata), void *userdata) {
  54     struct once_info *i;
  55     struct pa_defer_event *e;
  56     assert(m && callback);
  57
  58     i = pa_xmalloc(sizeof(struct once_info));
  59     i->callback = callback;
  60     i->userdata = userdata;
  61
  62     assert(m->defer_new);
  63     e = m->defer_new(m, once_callback, i);
  64     assert(e);
  65     m->defer_set_destroy(e, free_callback);
  66 }
  67