5b82ffc291
After we've been hit by Large File Support problems several times in the past week (which only occur on 32 bit platforms, which I don't have), this is yet another attempt to fix the issue.
162 lines
3.4 KiB
C
162 lines
3.4 KiB
C
/*
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* Copyright (C) 2003-2009 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 "update_internal.h"
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#include "update.h"
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#include "database.h"
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#include "mapper.h"
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#include "playlist.h"
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#include "event_pipe.h"
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#include "update.h"
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#include "idle.h"
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#include "stats.h"
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#include "main.h"
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#include <glib.h>
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#include <assert.h>
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static enum update_progress {
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UPDATE_PROGRESS_IDLE = 0,
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UPDATE_PROGRESS_RUNNING = 1,
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UPDATE_PROGRESS_DONE = 2
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} progress;
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static bool modified;
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static GThread *update_thr;
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static const unsigned update_task_id_max = 1 << 15;
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static unsigned update_task_id;
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/* XXX this flag is passed to update_task() */
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static bool discard;
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unsigned
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isUpdatingDB(void)
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{
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return (progress != UPDATE_PROGRESS_IDLE) ? update_task_id : 0;
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}
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static void * update_task(void *_path)
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{
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const char *path = _path;
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modified = update_walk(path, discard);
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g_free(_path);
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if (modified || !db_exists())
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db_save();
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progress = UPDATE_PROGRESS_DONE;
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event_pipe_emit(PIPE_EVENT_UPDATE);
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return NULL;
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}
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static void
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spawn_update_task(const char *path)
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{
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GError *e = NULL;
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assert(g_thread_self() == main_task);
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progress = UPDATE_PROGRESS_RUNNING;
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modified = false;
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update_thr = g_thread_create(update_task, g_strdup(path), TRUE, &e);
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if (update_thr == NULL)
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g_error("Failed to spawn update task: %s", e->message);
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if (++update_task_id > update_task_id_max)
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update_task_id = 1;
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g_debug("spawned thread for update job id %i", update_task_id);
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}
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unsigned
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update_enqueue(const char *path, bool _discard)
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{
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assert(g_thread_self() == main_task);
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if (!mapper_has_music_directory())
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return 0;
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if (progress != UPDATE_PROGRESS_IDLE) {
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unsigned next_task_id =
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update_queue_push(path, discard, update_task_id);
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if (next_task_id == 0)
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return 0;
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return next_task_id > update_task_id_max ? 1 : next_task_id;
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}
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discard = _discard;
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spawn_update_task(path);
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idle_add(IDLE_UPDATE);
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return update_task_id;
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}
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/**
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* Called in the main thread after the database update is finished.
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*/
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static void update_finished_event(void)
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{
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char *path;
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assert(progress == UPDATE_PROGRESS_DONE);
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g_thread_join(update_thr);
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idle_add(IDLE_UPDATE);
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if (modified) {
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/* send "idle" events */
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playlist_increment_version_all(&g_playlist);
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idle_add(IDLE_DATABASE);
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}
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path = update_queue_shift(&discard);
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if (path != NULL) {
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/* schedule the next path */
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spawn_update_task(path);
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g_free(path);
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} else {
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progress = UPDATE_PROGRESS_IDLE;
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stats_update();
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}
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}
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void update_global_init(void)
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{
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event_pipe_register(PIPE_EVENT_UPDATE, update_finished_event);
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update_remove_global_init();
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update_walk_global_init();
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}
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void update_global_finish(void)
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{
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update_walk_global_finish();
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update_remove_global_finish();
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}
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