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// 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.
#include <memory>
#include "base/macros.h"
#include "base/synchronization/waitable_event.h"
#include "chromeos/chromeos_export.h"
#include "dbus/message.h"
namespace dbus {
class Bus;
class ObjectProxy;
class ScopedDBusError;
} // namespace dbus
namespace chromeos {
// A utility class to call D-Bus methods in a synchronous (blocking) way.
// Note: Blocking the thread until it returns is not a good idea in most cases.
// Avoid using this class as hard as you can.
class CHROMEOS_EXPORT BlockingMethodCaller {
BlockingMethodCaller(dbus::Bus* bus, dbus::ObjectProxy* proxy);
virtual ~BlockingMethodCaller();
// Calls the method and blocks until it returns.
std::unique_ptr<dbus::Response> CallMethodAndBlock(
dbus::MethodCall* method_call);
// Calls the method and blocks until it returns. Populates the |error| and
// returns null in case of an error.
std::unique_ptr<dbus::Response> CallMethodAndBlockWithError(
dbus::MethodCall* method_call,
dbus::ScopedDBusError* error_out);
dbus::Bus* bus_;
dbus::ObjectProxy* proxy_;
base::WaitableEvent on_blocking_method_call_;
} // namespace chromeos