code.delx.au - pulseaudio/blob - src/pulse/mainloop-api.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5
   6   PulseAudio 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   PulseAudio 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 PulseAudio; 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 <stdlib.h>
  27
  28 #include <pulse/xmalloc.h>
  29 #include <pulse/gccmacro.h>
  30
  31 #include <pulsecore/macro.h>
  32
  33 #include "mainloop-api.h"
  34
  35 struct once_info {
  36     void (*callback)(pa_mainloop_api*m, void *userdata);
  37     void *userdata;
  38 };
  39
  40 static void once_callback(pa_mainloop_api *m, pa_defer_event *e, void *userdata) {
  41     struct once_info *i = userdata;
  42
  43     pa_assert(m);
  44     pa_assert(i);
  45
  46     pa_assert(i->callback);
  47     i->callback(m, i->userdata);
  48
  49     pa_assert(m->defer_free);
  50     m->defer_free(e);
  51 }
  52
  53 static void free_callback(pa_mainloop_api *m, PA_GCC_UNUSED pa_defer_event *e, void *userdata) {
  54     struct once_info *i = userdata;
  55
  56     pa_assert(m);
  57     pa_assert(i);
  58     pa_xfree(i);
  59 }
  60
  61 void pa_mainloop_api_once(pa_mainloop_api* m, void (*callback)(pa_mainloop_api *m, void *userdata), void *userdata) {
  62     struct once_info *i;
  63     pa_defer_event *e;
  64
  65     pa_assert(m);
  66     pa_assert(callback);
  67
  68     i = pa_xnew(struct once_info, 1);
  69     i->callback = callback;
  70     i->userdata = userdata;
  71
  72     pa_assert(m->defer_new);
  73     pa_assert_se(e = m->defer_new(m, once_callback, i));
  74     m->defer_set_destroy(e, free_callback);
  75 }