event/SocketEvent: use class IntrusiveList<>

src/event/Loop.hxx

@@ -91,10 +91,7 @@ class EventLoop final
 	DeferredList deferred;
 #endif
 
-	using SocketList =
-		boost::intrusive::list<SocketEvent,
-				       boost::intrusive::base_hook<boost::intrusive::list_base_hook<boost::intrusive::link_mode<boost::intrusive::auto_unlink>>>,
-				       boost::intrusive::constant_time_size<false>>;
+	using SocketList = IntrusiveList<SocketEvent>;
 
 	/**
 	 * A list of scheduled #SocketEvent instances, without those

src/event/SocketEvent.hxx

@@ -23,8 +23,7 @@
 #include "PollGroup.hxx"
 #include "net/SocketDescriptor.hxx"
 #include "util/BindMethod.hxx"
-
-#include <boost/intrusive/list_hook.hpp>
+#include "util/IntrusiveList.hxx"
 
 #include <cassert>
 #include <cstddef>
@@ -45,8 +44,9 @@ class EventLoop;
  * thread that runs the #EventLoop, except where explicitly documented
  * as thread-safe.
  */
-class SocketEvent final : public boost::intrusive::list_base_hook<boost::intrusive::link_mode<boost::intrusive::auto_unlink>> {
+class SocketEvent final : IntrusiveListHook {
 	friend class EventLoop;
+	friend class IntrusiveList<SocketEvent>;
 
 	EventLoop &loop;