code.delx.au - pulseaudio/blob - src/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 Lesser General Public License as
   8   published by the Free Software Foundation; either version 2.1 of the
   9   License, 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   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License 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 <polypcore/gccmacro.h>
  30 #include <polypcore/xmalloc.h>
  31
  32 #include "mainloop-api.h"
  33
  34 struct once_info {
  35     void (*callback)(pa_mainloop_api*m, void *userdata);
  36     void *userdata;
  37 };
  38
  39 static void once_callback(pa_mainloop_api *m, pa_defer_event *e, void *userdata) {
  40     struct once_info *i = userdata;
  41     assert(m && i && i->callback);
  42
  43     i->callback(m, i->userdata);
  44
  45     assert(m->defer_free);
  46     m->defer_free(e);
  47 }
  48
  49 static void free_callback(pa_mainloop_api *m, PA_GCC_UNUSED pa_defer_event *e, void *userdata) {
  50     struct once_info *i = userdata;
  51     assert(m && i);
  52     pa_xfree(i);
  53 }
  54
  55 void pa_mainloop_api_once(pa_mainloop_api* m, void (*callback)(pa_mainloop_api *m, void *userdata), void *userdata) {
  56     struct once_info *i;
  57     pa_defer_event *e;
  58     assert(m && callback);
  59
  60     i = pa_xnew(struct once_info, 1);
  61     i->callback = callback;
  62     i->userdata = userdata;
  63
  64     assert(m->defer_new);
  65     e = m->defer_new(m, once_callback, i);
  66     assert(e);
  67     m->defer_set_destroy(e, free_callback);
  68 }
  69