code.delx.au - pulseaudio/blob - polyp/subscribe.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   polypaudio 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 General Public License
  17   along with polypaudio; 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 <stdio.h>
  27 #include <assert.h>
  28
  29 #include "queue.h"
  30 #include "subscribe.h"
  31 #include "xmalloc.h"
  32 #include "log.h"
  33
  34 struct pa_subscription {
  35     struct pa_core *core;
  36     int dead;
  37     void (*callback)(struct pa_core *c, enum pa_subscription_event_type t, uint32_t index, void *userdata);
  38     void *userdata;
  39     enum pa_subscription_mask mask;
  40
  41     struct pa_subscription *prev, *next;
  42 };
  43
  44 struct pa_subscription_event {
  45     enum pa_subscription_event_type type;
  46     uint32_t index;
  47 };
  48
  49 static void sched_event(struct pa_core *c);
  50
  51 struct pa_subscription* pa_subscription_new(struct pa_core *c, enum pa_subscription_mask m, void (*callback)(struct pa_core *c, enum pa_subscription_event_type t, uint32_t index, void *userdata), void *userdata) {
  52     struct pa_subscription *s;
  53     assert(c);
  54
  55     s = pa_xmalloc(sizeof(struct pa_subscription));
  56     s->core = c;
  57     s->dead = 0;
  58     s->callback = callback;
  59     s->userdata = userdata;
  60     s->mask = m;
  61
  62     if ((s->next = c->subscriptions))
  63         s->next->prev = s;
  64     s->prev = NULL;
  65     c->subscriptions = s;
  66     return s;
  67 }
  68
  69 void pa_subscription_free(struct pa_subscription*s) {
  70     assert(s && !s->dead);
  71     s->dead = 1;
  72     sched_event(s->core);
  73 }
  74
  75 static void free_item(struct pa_subscription *s) {
  76     assert(s && s->core);
  77
  78     if (s->prev)
  79         s->prev->next = s->next;
  80     else
  81         s->core->subscriptions = s->next;
  82
  83     if (s->next)
  84         s->next->prev = s->prev;
  85
  86     pa_xfree(s);
  87 }
  88
  89 void pa_subscription_free_all(struct pa_core *c) {
  90     struct pa_subscription_event *e;
  91     assert(c);
  92
  93     while (c->subscriptions)
  94         free_item(c->subscriptions);
  95
  96     if (c->subscription_event_queue) {
  97         while ((e = pa_queue_pop(c->subscription_event_queue)))
  98             pa_xfree(e);
  99
 100         pa_queue_free(c->subscription_event_queue, NULL, NULL);
 101         c->subscription_event_queue = NULL;
 102     }
 103
 104     if (c->subscription_defer_event) {
 105         c->mainloop->defer_free(c->subscription_defer_event);
 106         c->subscription_defer_event = NULL;
 107     }
 108 }
 109
 110 /*static void dump_event(struct pa_subscription_event*e) {
 111     switch (e->type & PA_SUBSCRIPTION_EVENT_FACILITY_MASK) {
 112         case PA_SUBSCRIPTION_EVENT_SINK:
 113             pa_log(__FILE__": SINK_EVENT");
 114             break;
 115         case PA_SUBSCRIPTION_EVENT_SOURCE:
 116             pa_log(__FILE__": SOURCE_EVENT");
 117             break;
 118         case PA_SUBSCRIPTION_EVENT_SINK_INPUT:
 119             pa_log(__FILE__": SINK_INPUT_EVENT");
 120             break;
 121         case PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT:
 122             pa_log(__FILE__": SOURCE_OUTPUT_EVENT");
 123             break;
 124         case PA_SUBSCRIPTION_EVENT_MODULE:
 125             pa_log(__FILE__": MODULE_EVENT");
 126             break;
 127         case PA_SUBSCRIPTION_EVENT_CLIENT:
 128             pa_log(__FILE__": CLIENT_EVENT");
 129             break;
 130         default:
 131             pa_log(__FILE__": OTHER");
 132             break;
 133     }
 134
 135     switch (e->type & PA_SUBSCRIPTION_EVENT_TYPE_MASK) {
 136         case PA_SUBSCRIPTION_EVENT_NEW:
 137             pa_log(__FILE__":  NEW");
 138             break;
 139         case PA_SUBSCRIPTION_EVENT_CHANGE:
 140             pa_log(__FILE__":  CHANGE");
 141             break;
 142         case PA_SUBSCRIPTION_EVENT_REMOVE:
 143             pa_log(__FILE__":  REMOVE");
 144             break;
 145         default:
 146             pa_log(__FILE__":  OTHER");
 147             break;
 148     }
 149
 150     pa_log(__FILE__":  %u\n", e->index);
 151 }*/
 152
 153 static void defer_cb(struct pa_mainloop_api *m, struct pa_defer_event *e, void *userdata) {
 154     struct pa_core *c = userdata;
 155     struct pa_subscription *s;
 156     assert(c && c->subscription_defer_event == e && c->mainloop == m);
 157
 158     c->mainloop->defer_enable(c->subscription_defer_event, 0);
 159
 160
 161     /* Dispatch queued events */
 162
 163     if (c->subscription_event_queue) {
 164         struct pa_subscription_event *e;
 165
 166         while ((e = pa_queue_pop(c->subscription_event_queue))) {
 167             struct pa_subscription *s;
 168
 169             for (s = c->subscriptions; s; s = s->next) {
 170
 171                 if (!s->dead && pa_subscription_match_flags(s->mask, e->type))
 172                     s->callback(c, e->type, e->index, s->userdata);
 173             }
 174
 175             pa_xfree(e);
 176         }
 177     }
 178
 179     /* Remove dead subscriptions */
 180
 181     s = c->subscriptions;
 182     while (s) {
 183         struct pa_subscription *n = s->next;
 184         if (s->dead)
 185             free_item(s);
 186         s = n;
 187     }
 188 }
 189
 190 static void sched_event(struct pa_core *c) {
 191     assert(c);
 192
 193     if (!c->subscription_defer_event) {
 194         c->subscription_defer_event = c->mainloop->defer_new(c->mainloop, defer_cb, c);
 195         assert(c->subscription_defer_event);
 196     }
 197
 198     c->mainloop->defer_enable(c->subscription_defer_event, 1);
 199 }
 200
 201
 202 void pa_subscription_post(struct pa_core *c, enum pa_subscription_event_type t, uint32_t index) {
 203     struct pa_subscription_event *e;
 204     assert(c);
 205
 206     e = pa_xmalloc(sizeof(struct pa_subscription_event));
 207     e->type = t;
 208     e->index = index;
 209
 210     if (!c->subscription_event_queue) {
 211         c->subscription_event_queue = pa_queue_new();
 212         assert(c->subscription_event_queue);
 213     }
 214
 215     pa_queue_push(c->subscription_event_queue, e);
 216     sched_event(c);
 217 }
 218
 219