command: added command "idle"

"idle" waits until something noteworthy happens on the server,
e.g. song change, playlist modified, database updated.  This allows
clients to keep up to date without polling.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/client.h b/src/client.h
index 0d9f2e76a..50238d9f0 100644
--- a/src/client.h
+++ b/src/client.h
@@ -21,6 +21,7 @@
 
 #include "gcc.h"
 
+#include <stdbool.h>
 #include <stddef.h>
 #include <stdarg.h>
 #include <sys/socket.h>
@@ -60,4 +61,17 @@ void client_vprintf(struct client *client, const char *fmt, va_list args);
  */
 mpd_fprintf void client_printf(struct client *client, const char *fmt, ...);
 
+/**
+ * Adds the specified idle flags to all clients and immediately sends
+ * notifications to all waiting clients.
+ */
+void client_manager_idle_add(unsigned flags);
+
+/**
+ * Checks whether the client has pending idle flags.  If yes, they are
+ * sent immediately and "true" is returned".  If no, it puts the
+ * client into waiting mode and returns false.
+ */
+bool client_idle_wait(struct client *client);
+
 #endif