code.delx.au - pulseaudio/blob - src/pulsecore/avahi-wrap.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as
  10   published by the Free Software Foundation; either version 2 of the
  11   License, or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public
  19   License along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #include <assert.h>
  25
  26 #include <pulse/xmalloc.h>
  27
  28 #include <pulsecore/log.h>
  29
  30 #include "avahi-wrap.h"
  31
  32 typedef struct {
  33     AvahiPoll api;
  34     pa_mainloop_api *mainloop;
  35 } pa_avahi_poll;
  36
  37 struct AvahiWatch {
  38     pa_io_event *io_event;
  39     pa_avahi_poll *avahi_poll;
  40     AvahiWatchEvent current_event;
  41     AvahiWatchCallback callback;
  42     void *userdata;
  43 };
  44
  45 static AvahiWatchEvent translate_io_flags_back(pa_io_event_flags_t e) {
  46     return
  47         (e & PA_IO_EVENT_INPUT ? AVAHI_WATCH_IN : 0) |
  48         (e & PA_IO_EVENT_OUTPUT ? AVAHI_WATCH_OUT : 0) |
  49         (e & PA_IO_EVENT_ERROR ? AVAHI_WATCH_ERR : 0) |
  50         (e & PA_IO_EVENT_HANGUP ? AVAHI_WATCH_HUP : 0);
  51 }
  52
  53 static pa_io_event_flags_t translate_io_flags(AvahiWatchEvent e) {
  54     return
  55         (e & AVAHI_WATCH_IN ? PA_IO_EVENT_INPUT : 0) |
  56         (e & AVAHI_WATCH_OUT ? PA_IO_EVENT_OUTPUT : 0) |
  57         (e & AVAHI_WATCH_ERR ? PA_IO_EVENT_ERROR : 0) |
  58         (e & AVAHI_WATCH_HUP ? PA_IO_EVENT_HANGUP : 0);
  59 }
  60
  61 static void watch_callback(pa_mainloop_api*a, pa_io_event* e, int fd, pa_io_event_flags_t events, void *userdata) {
  62     AvahiWatch *w = userdata;
  63
  64     assert(a);
  65     assert(e);
  66     assert(w);
  67
  68     w->current_event = translate_io_flags_back(events);
  69     w->callback(w, fd, w->current_event, w->userdata);
  70     w->current_event = 0;
  71 }
  72
  73 static AvahiWatch* watch_new(const AvahiPoll *api, int fd, AvahiWatchEvent event, AvahiWatchCallback callback, void *userdata) {
  74     pa_avahi_poll *p;
  75     AvahiWatch *w;
  76
  77     assert(api);
  78     assert(fd >= 0);
  79     assert(callback);
  80
  81     p = api->userdata;
  82     assert(p);
  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     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     assert(w);
 102
 103     return w->current_event;
 104 }
 105
 106 static void watch_free(AvahiWatch *w) {
 107     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 *tv, void *userdata) {
 121     AvahiTimeout *t = userdata;
 122
 123     assert(a);
 124     assert(e);
 125     assert(t);
 126
 127     t->callback(t, t->userdata);
 128 }
 129
 130 static AvahiTimeout* timeout_new(const AvahiPoll *api, const struct timeval *tv, AvahiTimeoutCallback callback, void *userdata) {
 131     pa_avahi_poll *p;
 132     AvahiTimeout *t;
 133
 134     assert(api);
 135     assert(callback);
 136
 137     p = api->userdata;
 138     assert(p);
 139
 140     t = pa_xnew(AvahiTimeout, 1);
 141     t->avahi_poll = p;
 142     t->callback = callback;
 143     t->userdata = userdata;
 144
 145     t->time_event = tv ? p->mainloop->time_new(p->mainloop, tv, timeout_callback, t) : NULL;
 146
 147     return t;
 148 }
 149
 150 static void timeout_update(AvahiTimeout *t, const struct timeval *tv) {
 151     assert(t);
 152
 153     if (t->time_event && tv)
 154         t->avahi_poll->mainloop->time_restart(t->time_event, tv);
 155     else if (!t->time_event && tv)
 156         t->time_event = t->avahi_poll->mainloop->time_new(t->avahi_poll->mainloop, tv, timeout_callback, t);
 157     else if (t->time_event && !tv) {
 158         t->avahi_poll->mainloop->time_free(t->time_event);
 159         t->time_event = NULL;
 160     }
 161 }
 162
 163 static void timeout_free(AvahiTimeout *t) {
 164     assert(t);
 165
 166     if (t->time_event)
 167         t->avahi_poll->mainloop->time_free(t->time_event);
 168     pa_xfree(t);
 169 }
 170
 171 AvahiPoll* pa_avahi_poll_new(pa_mainloop_api *m) {
 172     pa_avahi_poll *p;
 173
 174     assert(m);
 175
 176     p = pa_xnew(pa_avahi_poll, 1);
 177
 178     p->api.userdata = p;
 179     p->api.watch_new = watch_new;
 180     p->api.watch_update = watch_update;
 181     p->api.watch_get_events = watch_get_events;
 182     p->api.watch_free = watch_free;
 183     p->api.timeout_new = timeout_new;
 184     p->api.timeout_update = timeout_update;
 185     p->api.timeout_free = timeout_free;
 186     p->mainloop = m;
 187
 188     return &p->api;
 189 }
 190
 191 void pa_avahi_poll_free(AvahiPoll *api) {
 192     pa_avahi_poll *p;
 193     assert(api);
 194     p = api->userdata;
 195     assert(p);
 196
 197     pa_xfree(p);
 198 }
 199