src/client_idle.c

   1 /*
   2  * Copyright (C) 2003-2010 The Music Player Daemon Project
   3  * http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include "config.h"
  21 #include "client_internal.h"
  22 #include "idle.h"
  23
  24 #include <assert.h>
  25
  26 /**
  27  * Send "idle" response to this client.
  28  */
  29 static void
  30 client_idle_notify(struct client *client)
  31 {
  32         unsigned flags, i;
  33         const char *const* idle_names;
  34
  35         assert(client->idle_waiting);
  36         assert(client->idle_flags != 0);
  37
  38         flags = client->idle_flags;
  39         client->idle_flags = 0;
  40         client->idle_waiting = false;
  41
  42         idle_names = idle_get_names();
  43         for (i = 0; idle_names[i]; ++i) {
  44                 if (flags & (1 << i) & client->idle_subscriptions)
  45                         client_printf(client, "changed: %s\n",
  46                                       idle_names[i]);
  47         }
  48
  49         client_puts(client, "OK\n");
  50         g_timer_start(client->last_activity);
  51 }
  52
  53 static void
  54 client_idle_callback(gpointer data, gpointer user_data)
  55 {
  56         struct client *client = data;
  57         unsigned flags = GPOINTER_TO_UINT(user_data);
  58
  59         if (client_is_expired(client))
  60                 return;
  61
  62         client->idle_flags |= flags;
  63         if (client->idle_waiting
  64             && (client->idle_flags & client->idle_subscriptions)) {
  65                 client_idle_notify(client);
  66                 client_write_output(client);
  67         }
  68 }
  69
  70 void client_manager_idle_add(unsigned flags)
  71 {
  72         assert(flags != 0);
  73
  74         client_list_foreach(client_idle_callback, GUINT_TO_POINTER(flags));
  75 }
  76
  77 bool client_idle_wait(struct client *client, unsigned flags)
  78 {
  79         assert(!client->idle_waiting);
  80
  81         client->idle_waiting = true;
  82         client->idle_subscriptions = flags;
  83
  84         if (client->idle_flags & client->idle_subscriptions) {
  85                 client_idle_notify(client);
  86                 return true;
  87         } else
  88                 return false;
  89 }