0aee49bdf8
This updates the copyright header to all be the same, which is pretty much an update of where to mail request for a copy of the GPL and the years of the MPD project. This also puts all committers under 'The Music Player Project' umbrella. These entries should go individually in the AUTHORS file, for consistancy.
130 lines
2.8 KiB
C
130 lines
2.8 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 "state_file.h"
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#include "output_state.h"
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#include "playlist.h"
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#include "volume.h"
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#include <glib.h>
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#include <assert.h>
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#include <string.h>
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#include <errno.h>
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#undef G_LOG_DOMAIN
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#define G_LOG_DOMAIN "state_file"
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static struct _sf_cb {
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void (*reader)(FILE *);
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void (*writer)(FILE *);
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} sf_callbacks [] = {
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{ read_sw_volume_state, save_sw_volume_state },
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{ readAudioDevicesState, saveAudioDevicesState },
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{ readPlaylistState, savePlaylistState },
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};
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static char *state_file_path;
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/** the GLib source id for the save timer */
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static guint save_state_source_id;
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static void
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state_file_write(void)
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{
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unsigned int i;
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FILE *fp;
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if (state_file_path == NULL)
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return;
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fp = fopen(state_file_path, "w");
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if (G_UNLIKELY(!fp)) {
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g_warning("failed to create %s: %s",
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state_file_path, strerror(errno));
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return;
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}
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for (i = 0; i < G_N_ELEMENTS(sf_callbacks); i++)
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sf_callbacks[i].writer(fp);
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while(fclose(fp) && errno == EINTR) /* nothing */;
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}
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static void
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state_file_read(void)
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{
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unsigned int i;
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FILE *fp;
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assert(state_file_path != NULL);
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g_debug("Saving state file");
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fp = fopen(state_file_path, "r");
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if (G_UNLIKELY(!fp)) {
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g_warning("failed to open %s: %s",
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state_file_path, strerror(errno));
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return;
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}
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for (i = 0; i < G_N_ELEMENTS(sf_callbacks); i++) {
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sf_callbacks[i].reader(fp);
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rewind(fp);
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}
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while(fclose(fp) && errno == EINTR) /* nothing */;
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}
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/**
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* This function is called every 5 minutes by the GLib main loop, and
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* saves the state file.
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*/
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static gboolean
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timer_save_state_file(G_GNUC_UNUSED gpointer data)
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{
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state_file_write();
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return true;
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}
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void
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state_file_init(const char *path)
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{
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assert(state_file_path == NULL);
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if (path == NULL)
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return;
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state_file_path = g_strdup(path);
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state_file_read();
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save_state_source_id = g_timeout_add(5 * 60 * 1000,
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timer_save_state_file, NULL);
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}
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void
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state_file_finish(void)
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{
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if (save_state_source_id != 0)
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g_source_remove(save_state_source_id);
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if (state_file_path != NULL)
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state_file_write();
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g_free(state_file_path);
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}
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