src/pulsecore/avahi-wrap.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 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   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 <pulse/timeval.h>
  27 #include <pulse/xmalloc.h>
  28
  29 #include <pulsecore/log.h>
  30 #include <pulsecore/macro.h>
  31
  32 #include "avahi-wrap.h"
  33
  34 typedef struct {
  35     AvahiPoll api;
  36     pa_mainloop_api *mainloop;
  37 } pa_avahi_poll;
  38
  39 struct AvahiWatch {
  40     pa_io_event *io_event;
  41     pa_avahi_poll *avahi_poll;
  42     AvahiWatchEvent current_event;
  43     AvahiWatchCallback callback;
  44     void *userdata;
  45 };
  46
  47 static AvahiWatchEvent translate_io_flags_back(pa_io_event_flags_t e) {
  48     return
  49         (e & PA_IO_EVENT_INPUT ? AVAHI_WATCH_IN : 0) |
  50         (e & PA_IO_EVENT_OUTPUT ? AVAHI_WATCH_OUT : 0) |
  51         (e & PA_IO_EVENT_ERROR ? AVAHI_WATCH_ERR : 0) |
  52         (e & PA_IO_EVENT_HANGUP ? AVAHI_WATCH_HUP : 0);
  53 }
  54
  55 static pa_io_event_flags_t translate_io_flags(AvahiWatchEvent e) {
  56     return
  57         (e & AVAHI_WATCH_IN ? PA_IO_EVENT_INPUT : 0) |
  58         (e & AVAHI_WATCH_OUT ? PA_IO_EVENT_OUTPUT : 0) |
  59         (e & AVAHI_WATCH_ERR ? PA_IO_EVENT_ERROR : 0) |
  60         (e & AVAHI_WATCH_HUP ? PA_IO_EVENT_HANGUP : 0);
  61 }
  62
  63 static void watch_callback(pa_mainloop_api*a, pa_io_event* e, int fd, pa_io_event_flags_t events, void *userdata) {
  64     AvahiWatch *w = userdata;
  65
  66     pa_assert(a);
  67     pa_assert(e);
  68     pa_assert(w);
  69
  70     w->current_event = translate_io_flags_back(events);
  71     w->callback(w, fd, w->current_event, w->userdata);
  72     w->current_event = 0;
  73 }
  74
  75 static AvahiWatch* watch_new(const AvahiPoll *api, int fd, AvahiWatchEvent event, AvahiWatchCallback callback, void *userdata) {
  76     pa_avahi_poll *p;
  77     AvahiWatch *w;
  78
  79     pa_assert(api);
  80     pa_assert(fd >= 0);
  81     pa_assert(callback);
  82     pa_assert_se(p = api->userdata);
  83
  84     w = pa_xnew(AvahiWatch, 1);
  85     w->avahi_poll = p;
  86     w->current_event = 0;
  87     w->callback = callback;
  88     w->userdata = userdata;
  89     w->io_event = p->mainloop->io_new(p->mainloop, fd, translate_io_flags(event), watch_callback, w);
  90
  91     return w;
  92 }
  93
  94 static void watch_update(AvahiWatch *w, AvahiWatchEvent event) {
  95     pa_assert(w);
  96
  97     w->avahi_poll->mainloop->io_enable(w->io_event, translate_io_flags(event));
  98 }
  99
 100 static AvahiWatchEvent watch_get_events(AvahiWatch *w) {
 101     pa_assert(w);
 102
 103     return w->current_event;
 104 }
 105
 106 static void watch_free(AvahiWatch *w) {
 107     pa_assert(w);
 108
 109     w->avahi_poll->mainloop->io_free(w->io_event);
 110     pa_xfree(w);
 111 }
 112
 113 struct AvahiTimeout {
 114     pa_time_event *time_event;
 115     pa_avahi_poll *avahi_poll;
 116     AvahiTimeoutCallback callback;
 117     void *userdata;
 118 };
 119
 120 static void timeout_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *t, void *userdata) {
 121     AvahiTimeout *to = userdata;
 122
 123     pa_assert(a);
 124     pa_assert(e);
 125
 126     to->callback(to, to->userdata);
 127 }
 128
 129 static AvahiTimeout* timeout_new(const AvahiPoll *api, const struct timeval *tv, AvahiTimeoutCallback callback, void *userdata) {
 130     pa_avahi_poll *p;
 131     AvahiTimeout *t;
 132
 133     pa_assert(api);
 134     pa_assert(callback);
 135     pa_assert_se(p = api->userdata);
 136
 137     t = pa_xnew(AvahiTimeout, 1);
 138     t->avahi_poll = p;
 139     t->callback = callback;
 140     t->userdata = userdata;
 141
 142     t->time_event = tv ? p->mainloop->time_new(p->mainloop, tv, timeout_callback, t) : NULL;
 143
 144     return t;
 145 }
 146
 147 static void timeout_update(AvahiTimeout *t, const struct timeval *tv) {
 148
 149     pa_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     pa_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     pa_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     pa_assert(api);
 192     pa_assert_se(p = api->userdata);
 193
 194     pa_xfree(p);
 195 }
 196