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