136 lines
3.2 KiB
C
136 lines
3.2 KiB
C
/*
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* Copyright (C) 2003-2011 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "inotify_queue.h"
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#include "update.h"
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#include <glib.h>
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#include <string.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "inotify"
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enum {
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/**
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* Wait this long after the last change before calling
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* update_enqueue(). This increases the probability that
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* updates can be bundled.
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*/
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INOTIFY_UPDATE_DELAY_S = 5,
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};
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static GSList *inotify_queue;
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static guint queue_source_id;
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void
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mpd_inotify_queue_init(void)
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{
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}
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static void
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free_callback(gpointer data, G_GNUC_UNUSED gpointer user_data)
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{
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g_free(data);
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}
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void
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mpd_inotify_queue_finish(void)
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{
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if (queue_source_id != 0)
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g_source_remove(queue_source_id);
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g_slist_foreach(inotify_queue, free_callback, NULL);
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g_slist_free(inotify_queue);
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}
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static gboolean
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mpd_inotify_run_update(G_GNUC_UNUSED gpointer data)
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{
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unsigned id;
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while (inotify_queue != NULL) {
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char *uri_utf8 = inotify_queue->data;
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id = update_enqueue(uri_utf8, false);
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if (id == 0)
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/* retry later */
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return true;
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g_debug("updating '%s' job=%u", uri_utf8, id);
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g_free(uri_utf8);
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inotify_queue = g_slist_delete_link(inotify_queue,
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inotify_queue);
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}
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/* done, remove the timer event by returning false */
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queue_source_id = 0;
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return false;
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}
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static bool
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path_in(const char *path, const char *possible_parent)
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{
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size_t length = strlen(possible_parent);
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return path[0] == 0 ||
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(memcmp(possible_parent, path, length) == 0 &&
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(path[length] == 0 || path[length] == '/'));
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}
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void
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mpd_inotify_enqueue(char *uri_utf8)
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{
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GSList *old_queue = inotify_queue;
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if (queue_source_id != 0)
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g_source_remove(queue_source_id);
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queue_source_id = g_timeout_add_seconds(INOTIFY_UPDATE_DELAY_S,
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mpd_inotify_run_update, NULL);
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inotify_queue = NULL;
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while (old_queue != NULL) {
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char *current_uri = old_queue->data;
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if (path_in(uri_utf8, current_uri)) {
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/* already enqueued */
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g_free(uri_utf8);
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inotify_queue = g_slist_concat(inotify_queue,
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old_queue);
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return;
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}
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old_queue = g_slist_delete_link(old_queue, old_queue);
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if (path_in(current_uri, uri_utf8))
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/* existing path is a sub-path of the new
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path; we can dequeue the existing path and
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update the new path instead */
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g_free(current_uri);
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else
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/* move the existing path to the new queue */
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inotify_queue = g_slist_prepend(inotify_queue,
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current_uri);
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}
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inotify_queue = g_slist_prepend(inotify_queue, uri_utf8);
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}
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