ClientList: don't use GLib

Use std::list instead of GList.

src/ClientExpire.cxx

@@ -41,10 +41,8 @@ client_set_expired(Client *client)
 }
 
 static void
-client_check_expired_callback(gpointer data, G_GNUC_UNUSED gpointer user_data)
+client_check_expired_callback(Client *client, G_GNUC_UNUSED gpointer user_data)
 {
-	Client *client = (Client *)data;
-
 	if (client_is_expired(client)) {
 		g_debug("[%u] expired", client->num);
 		client_close(client);

src/ClientIdle.cxx

@@ -70,9 +70,8 @@ client_idle_add(Client *client, unsigned flags)
 }
 
 static void
-client_idle_callback(gpointer data, gpointer user_data)
+client_idle_callback(Client *client, gpointer user_data)
 {
-	Client *client = (Client *)data;
 	unsigned flags = GPOINTER_TO_UINT(user_data);
 
 	client_idle_add(client, flags);

src/ClientList.cxx

@@ -21,9 +21,12 @@
 #include "ClientList.hxx"
 #include "ClientInternal.hxx"
 
+#include <list>
+#include <algorithm>
+
 #include <assert.h>
 
-static GList *clients;
+static std::list<Client *> clients;
 static unsigned num_clients;
 
 bool
@@ -41,30 +44,33 @@ client_list_is_full(void)
 Client *
 client_list_get_first(void)
 {
-	assert(clients != NULL);
+	assert(!clients.empty());
 
-	return (Client *)clients->data;
+	return clients.front();
 }
 
 void
 client_list_add(Client *client)
 {
-	clients = g_list_prepend(clients, client);
+	clients.push_front(client);
 	++num_clients;
 }
 
 void
-client_list_foreach(GFunc func, gpointer user_data)
+client_list_foreach(void (*callback)(Client *client, void *ctx), void *ctx)
 {
-	g_list_foreach(clients, func, user_data);
+	for (Client *client : clients)
+		callback(client, ctx);
 }
 
 void
 client_list_remove(Client *client)
 {
 	assert(num_clients > 0);
-	assert(clients != NULL);
+	assert(!clients.empty());
 
-	clients = g_list_remove(clients, client);
+	auto i = std::find(clients.begin(), clients.end(), client);
+	assert(i != clients.end());
+	clients.erase(i);
 	--num_clients;
 }

src/ClientList.hxx

@@ -20,8 +20,6 @@
 #ifndef MPD_CLIENT_LIST_HXX
 #define MPD_CLIENT_LIST_HXX
 
-#include <glib.h>
-
 class Client;
 
 bool
@@ -37,7 +35,7 @@ void
 client_list_add(Client *client);
 
 void
-client_list_foreach(GFunc func, gpointer user_data);
+client_list_foreach(void (*callback)(Client *client, void *ctx), void *ctx);
 
 void
 client_list_remove(Client *client);

src/MessageCommands.cxx

@@ -78,11 +78,10 @@ struct channels_context {
 };
 
 static void
-collect_channels(gpointer data, gpointer user_data)
+collect_channels(Client *client, gpointer user_data)
 {
 	struct channels_context *context =
 		(struct channels_context *)user_data;
-	const Client *client = (const Client *)data;
 
 	context->channels.insert(client->subscriptions.begin(),
 				 client->subscriptions.end());
@@ -133,11 +132,10 @@ struct send_message_context {
 };
 
 static void
-send_message(gpointer data, gpointer user_data)
+send_message(Client *client, gpointer user_data)
 {
 	struct send_message_context *context =
 		(struct send_message_context *)user_data;
-	Client *client = (Client *)data;
 
 	if (client_push_message(client, context->msg))
 		context->sent = true;