state_file: save state_file every 5 minutes

When MPD quits in a non-clean way, the state file isn't written, and on the next start, MPD time warps to the previous clean shutdown. Save the state file every 5 minutes; this will probably be configurable at a later time. Note that we don't set a wakeup timer for that: when there is no MPD traffic, MPD won't wake up to save the state file. This minor bug is tolerated, because usually there is no change in MPD's state when the main thread is idle.

state_file: save state_file every 5 minutes
1c0c5832 · Max Kellermann · 695d8051 · 1c0c5832
Commit 1c0c5832 authored Nov 21, 2008 by Max Kellermann
Hide whitespace changes
Inline Side-by-side

Showing with 9 additions and 0 deletions

main.c src/main.c +9 -0

No files found.
--- a/src/main.c
+++ b/src/main.c
@@ -383,6 +383,7 @@ int main(int argc, char *argv[])
 {
 	Options options;
 	clock_t start;
+	GTimer *save_state_timer;

 #ifdef HAVE_LOCALE
 	/* initialize locale */
@@ -446,6 +447,8 @@ int main(int argc, char *argv[])
 	player_create();
 	read_state_file();

+	save_state_timer = g_timer_new();
+
 	while (COMMAND_RETURN_KILL != client_manager_io() &&
 	       COMMAND_RETURN_KILL != handlePendingSignals()) {
 		unsigned flags;
@@ -459,6 +462,12 @@ int main(int argc, char *argv[])
 		flags = idle_get();
 		if (flags != 0)
 			client_manager_idle_add(flags);
+
+		if (g_timer_elapsed(save_state_timer, NULL) >= 5 * 60) {
+			g_debug("Saving state file\n");
+			write_state_file();
+			g_timer_start(save_state_timer);
+		}
 	}

 	write_state_file();