src/pulsecore/avahi-wrap.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   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 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   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 #include <assert.h>
  23
  24 #include <pulse/xmalloc.h>
  25
  26 #include <pulsecore/log.h>
  27
  28 #include "avahi-wrap.h"
  29
  30 typedef struct {
  31     AvahiPoll api;
  32     pa_mainloop_api *mainloop;
  33 } pa_avahi_poll;
  34
  35 struct AvahiWatch {
  36     pa_io_event *io_event;
  37     pa_avahi_poll *avahi_poll;
  38     AvahiWatchEvent current_event;
  39     AvahiWatchCallback callback;
  40     void *userdata;
  41 };
  42
  43 static AvahiWatchEvent translate_io_flags_back(pa_io_event_flags_t e) {
  44     return
  45         (e & PA_IO_EVENT_INPUT ? AVAHI_WATCH_IN : 0) |
  46         (e & PA_IO_EVENT_OUTPUT ? AVAHI_WATCH_OUT : 0) |
  47         (e & PA_IO_EVENT_ERROR ? AVAHI_WATCH_ERR : 0) |
  48         (e & PA_IO_EVENT_HANGUP ? AVAHI_WATCH_HUP : 0);
  49 }
  50
  51 static pa_io_event_flags_t translate_io_flags(AvahiWatchEvent e) {
  52     return
  53         (e & AVAHI_WATCH_IN ? PA_IO_EVENT_INPUT : 0) |
  54         (e & AVAHI_WATCH_OUT ? PA_IO_EVENT_OUTPUT : 0) |
  55         (e & AVAHI_WATCH_ERR ? PA_IO_EVENT_ERROR : 0) |
  56         (e & AVAHI_WATCH_HUP ? PA_IO_EVENT_HANGUP : 0);
  57 }
  58
  59 static void watch_callback(pa_mainloop_api*a, pa_io_event* e, int fd, pa_io_event_flags_t events, void *userdata) {
  60     AvahiWatch *w = userdata;
  61
  62     assert(a);
  63     assert(e);
  64     assert(w);
  65
  66     w->current_event = translate_io_flags_back(events);
  67     w->callback(w, fd, w->current_event, w->userdata);
  68     w->current_event = 0;
  69 }
  70
  71 static AvahiWatch* watch_new(const AvahiPoll *api, int fd, AvahiWatchEvent event, AvahiWatchCallback callback, void *userdata) {
  72     pa_avahi_poll *p;
  73     AvahiWatch *w;
  74
  75     assert(api);
  76     assert(fd >= 0);
  77     assert(callback);
  78
  79     p = api->userdata;
  80     assert(p);
  81
  82     w = pa_xnew(AvahiWatch, 1);
  83     w->avahi_poll = p;
  84     w->current_event = 0;
  85     w->callback = callback;
  86     w->userdata = userdata;
  87     w->io_event = p->mainloop->io_new(p->mainloop, fd, translate_io_flags(event), watch_callback, w);
  88
  89     return w;
  90 }
  91
  92 static void watch_update(AvahiWatch *w, AvahiWatchEvent event) {
  93     assert(w);
  94
  95     w->avahi_poll->mainloop->io_enable(w->io_event, translate_io_flags(event));
  96 }
  97
  98 static AvahiWatchEvent watch_get_events(AvahiWatch *w) {
  99     assert(w);
 100
 101     return w->current_event;
 102 }
 103
 104 static void watch_free(AvahiWatch *w) {
 105     assert(w);
 106
 107     w->avahi_poll->mainloop->io_free(w->io_event);
 108     pa_xfree(w);
 109 }
 110
 111 struct AvahiTimeout {
 112     pa_time_event *time_event;
 113     pa_avahi_poll *avahi_poll;
 114     AvahiTimeoutCallback callback;
 115     void *userdata;
 116 };
 117
 118 static void timeout_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *tv, void *userdata) {
 119     AvahiTimeout *t = userdata;
 120
 121     assert(a);
 122     assert(e);
 123     assert(t);
 124
 125     t->callback(t, t->userdata);
 126 }
 127
 128 static AvahiTimeout* timeout_new(const AvahiPoll *api, const struct timeval *tv, AvahiTimeoutCallback callback, void *userdata) {
 129     pa_avahi_poll *p;
 130     AvahiTimeout *t;
 131
 132     assert(api);
 133     assert(callback);
 134
 135     p = api->userdata;
 136     assert(p);
 137
 138     t = pa_xnew(AvahiTimeout, 1);
 139     t->avahi_poll = p;
 140     t->callback = callback;
 141     t->userdata = userdata;
 142
 143     t->time_event = tv ? p->mainloop->time_new(p->mainloop, tv, timeout_callback, t) : NULL;
 144
 145     return t;
 146 }
 147
 148 static void timeout_update(AvahiTimeout *t, const struct timeval *tv) {
 149     assert(t);
 150
 151     if (t->time_event && tv)
 152         t->avahi_poll->mainloop->time_restart(t->time_event, tv);
 153     else if (!t->time_event && tv)
 154         t->time_event = t->avahi_poll->mainloop->time_new(t->avahi_poll->mainloop, tv, timeout_callback, t);
 155     else if (t->time_event && !tv) {
 156         t->avahi_poll->mainloop->time_free(t->time_event);
 157         t->time_event = NULL;
 158     }
 159 }
 160
 161 static void timeout_free(AvahiTimeout *t) {
 162     assert(t);
 163
 164     if (t->time_event)
 165         t->avahi_poll->mainloop->time_free(t->time_event);
 166     pa_xfree(t);
 167 }
 168
 169 AvahiPoll* pa_avahi_poll_new(pa_mainloop_api *m) {
 170     pa_avahi_poll *p;
 171
 172     assert(m);
 173
 174     p = pa_xnew(pa_avahi_poll, 1);
 175
 176     p->api.userdata = p;
 177     p->api.watch_new = watch_new;
 178     p->api.watch_update = watch_update;
 179     p->api.watch_get_events = watch_get_events;
 180     p->api.watch_free = watch_free;
 181     p->api.timeout_new = timeout_new;
 182     p->api.timeout_update = timeout_update;
 183     p->api.timeout_free = timeout_free;
 184     p->mainloop = m;
 185
 186     return &p->api;
 187 }
 188
 189 void pa_avahi_poll_free(AvahiPoll *api) {
 190     pa_avahi_poll *p;
 191     assert(api);
 192     p = api->userdata;
 193     assert(p);
 194
 195     pa_xfree(p);
 196 }
 197