blob: db79c92104541a99fa0b7a3ffe083012a3788b41 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// A thin wrapper around buzz::XmppClient that exposes weak pointers
// so that users know when the buzz::XmppClient becomes invalid to use
// (not necessarily only at destruction time).
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "third_party/libjingle_xmpp/xmpp/xmppclient.h"
namespace rtc {
class TaskParent;
} // namespace
namespace notifier {
// buzz::XmppClient's destructor isn't marked virtual, but it inherits
// from rtc::Task, whose destructor *is* marked virtual, so we
// can safely inherit from it.
class WeakXmppClient : public buzz::XmppClient {
explicit WeakXmppClient(rtc::TaskParent* parent);
~WeakXmppClient() override;
// Returns a weak pointer that is invalidated when the XmppClient
// becomes invalid to use.
base::WeakPtr<WeakXmppClient> AsWeakPtr();
// Invalidates all weak pointers to this object. (This method is
// necessary as calling Abort() does not always lead to Stop() being
// called, so it's not a reliable way to cause an invalidation.)
void Invalidate();
void Stop() override;
// We use our own WeakPtrFactory instead of inheriting from
// SupportsWeakPtr since we want to invalidate in other places
// besides the destructor.
base::WeakPtrFactory<WeakXmppClient> weak_ptr_factory_;
} // namespace notifier