diff options
Diffstat (limited to 'src/state_file.c')
| -rw-r--r-- | src/state_file.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/state_file.c b/src/state_file.c index 14c76d739..4ba157b14 100644 --- a/src/state_file.c +++ b/src/state_file.c @@ -36,6 +36,13 @@ static char *state_file_path; /** the GLib source id for the save timer */ static guint save_state_source_id; +/** + * These version numbers determine whether we need to save the state + * file. If nothing has changed, we won't let the hard drive spin up. + */ +static unsigned prev_volume_version, prev_output_version, + prev_playlist_version; + static void state_file_write(void) { @@ -57,6 +64,10 @@ state_file_write(void) playlist_state_save(fp, &g_playlist); while(fclose(fp) && errno == EINTR) /* nothing */; + + prev_volume_version = sw_volume_state_get_hash(); + prev_output_version = audio_output_state_get_version(); + prev_playlist_version = playlist_state_get_hash(&g_playlist); } static void @@ -88,6 +99,10 @@ state_file_read(void) } while(fclose(fp) && errno == EINTR) /* nothing */; + + prev_volume_version = sw_volume_state_get_hash(); + prev_output_version = audio_output_state_get_version(); + prev_playlist_version = playlist_state_get_hash(&g_playlist); } /** @@ -97,6 +112,13 @@ state_file_read(void) static gboolean timer_save_state_file(G_GNUC_UNUSED gpointer data) { + if (prev_volume_version == sw_volume_state_get_hash() && + prev_output_version == audio_output_state_get_version() && + prev_playlist_version == playlist_state_get_hash(&g_playlist)) + /* nothing has changed - don't save the state file, + don't spin up the hard disk */ + return true; + state_file_write(); return true; } |