Client: use TimeoutMonitor to track connection timeout

Don't use a global loop over the whole client list.

src/ClientExpire.cxx

@@ -19,9 +19,6 @@
 
 #include "config.h"
 #include "ClientInternal.hxx"
-#include "ClientList.hxx"
-
-static guint expire_source_id;
 
 void
 Client::SetExpired()
@@ -29,54 +26,18 @@ Client::SetExpired()
 	if (IsExpired())
 		return;
 
-	client_schedule_expire();
 	BufferedSocket::Close();
+	TimeoutMonitor::Schedule(0);
 }
 
-static void
-client_check_expired_callback(Client *client, G_GNUC_UNUSED gpointer user_data)
+bool
+Client::OnTimeout()
 {
-	if (client->IsExpired()) {
-		g_debug("[%u] expired", client->num);
-		client->Close();
-	} else if (!client->idle_waiting && /* idle clients
-					       never expire */
-		   (int)g_timer_elapsed(client->last_activity, NULL) >
-		   client_timeout) {
-		g_debug("[%u] timeout", client->num);
-		client->Close();
+	if (!IsExpired()) {
+		assert(!idle_waiting);
+		g_debug("[%u] timeout", num);
 	}
-}
 
-static void
-client_manager_expire(void)
-{
-	client_list_foreach(client_check_expired_callback, NULL);
-}
-
-/**
- * An idle event which calls client_manager_expire().
- */
-static gboolean
-client_manager_expire_event(G_GNUC_UNUSED gpointer data)
-{
-	expire_source_id = 0;
-	client_manager_expire();
+	Close();
 	return false;
 }
-
-void
-client_schedule_expire(void)
-{
-	if (expire_source_id == 0)
-		/* delayed deletion */
-		expire_source_id = g_idle_add(client_manager_expire_event,
-					      NULL);
-}
-
-void
-client_deinit_expire(void)
-{
-	if (expire_source_id != 0)
-		g_source_remove(expire_source_id);
-}

src/ClientGlobal.cxx

@@ -69,6 +69,4 @@ void client_manager_deinit(void)
 	client_close_all();
 
 	client_max_connections = 0;
-
-	client_deinit_expire();
 }

src/ClientIdle.cxx

@@ -43,7 +43,8 @@ Client::IdleNotify()
 	}
 
 	client_puts(this, "OK\n");
-	g_timer_start(last_activity);
+
+	TimeoutMonitor::ScheduleSeconds(client_timeout);
 }
 
 void
@@ -83,6 +84,9 @@ Client::IdleWait(unsigned flags)
 	if (idle_flags & idle_subscriptions) {
 		IdleNotify();
 		return true;
-	} else
+	} else {
+		/* disable timeouts while in "idle" */
+		TimeoutMonitor::Cancel();
 		return false;
+	}
 }

src/ClientInternal.hxx

@@ -25,6 +25,7 @@
 #include "ClientMessage.hxx"
 #include "CommandListBuilder.hxx"
 #include "event/BufferedSocket.hxx"
+#include "event/TimeoutMonitor.hxx"
 #include "command.h"
 
 #include <set>
@@ -43,7 +44,7 @@ enum {
 
 struct Partition;
 
-class Client final : private BufferedSocket {
+class Client final : private BufferedSocket, TimeoutMonitor {
 public:
 	Partition &partition;
 	struct playlist &playlist;
@@ -54,11 +55,6 @@ public:
 	/** the uid of the client process, or -1 if unknown */
 	int uid;
 
-	/**
-	 * How long since the last activity from this client?
-	 */
-	GTimer *last_activity;
-
 	CommandListBuilder cmd_list;
 
 	unsigned int num;	/* client number */
@@ -91,7 +87,6 @@ public:
 
 	Client(EventLoop &loop, Partition &partition,
 	       int fd, int uid, int num);
-	~Client();
 
 	bool IsConnected() const {
 		return BufferedSocket::IsDefined();
@@ -125,6 +120,9 @@ private:
 					  size_t length) override;
 	virtual void OnSocketError(GError *error) override;
 	virtual void OnSocketClosed() override;
+
+	/* virtual methods from class TimeoutMonitor */
+	virtual bool OnTimeout() override;
 };
 
 extern unsigned int client_max_connections;
@@ -132,19 +130,6 @@ extern int client_timeout;
 extern size_t client_max_command_list_size;
 extern size_t client_max_output_buffer_size;
 
-/**
- * Schedule an "expired" check for all clients: permanently delete
- * clients which have been set "expired" with client_set_expired().
- */
-void
-client_schedule_expire(void);
-
-/**
- * Removes a scheduled "expired" check.
- */
-void
-client_deinit_expire(void);
-
 enum command_return
 client_read(Client *client);
 

src/ClientNew.cxx

@@ -49,20 +49,16 @@ static const char GREETING[] = "OK MPD " PROTOCOL_VERSION "\n";
 Client::Client(EventLoop &_loop, Partition &_partition,
 	       int _fd, int _uid, int _num)
 	:BufferedSocket(_fd, _loop, 16384, client_max_output_buffer_size),
+	 TimeoutMonitor(_loop),
 	 partition(_partition),
 	 playlist(partition.playlist), player_control(&partition.pc),
 	 permission(getDefaultPermissions()),
 	 uid(_uid),
-	 last_activity(g_timer_new()),
 	 num(_num),
 	 idle_waiting(false), idle_flags(0),
 	 num_subscriptions(0)
 {
-}
-
-Client::~Client()
-{
-	g_timer_destroy(last_activity);
+	TimeoutMonitor::ScheduleSeconds(client_timeout);
 }
 
 void

src/ClientRead.cxx

@@ -28,13 +28,13 @@
 BufferedSocket::InputResult
 Client::OnSocketInput(const void *data, size_t length)
 {
-	g_timer_start(last_activity);
-
 	const char *p = (const char *)data;
 	const char *newline = (const char *)memchr(p, '\n', length);
 	if (newline == NULL)
 		return InputResult::MORE;
 
+	TimeoutMonitor::ScheduleSeconds(client_timeout);
+
 	char *line = g_strndup(p, newline - p);
 	BufferedSocket::ConsumeInput(newline + 1 - p);