1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROMEOS_DBUS_BLOCKING_METHOD_CALLER_H_ 6 #define CHROMEOS_DBUS_BLOCKING_METHOD_CALLER_H_ 7 8 #include "base/callback.h" 9 #include "base/synchronization/waitable_event.h" 10 #include "chromeos/chromeos_export.h" 11 #include "dbus/message.h" 12 13 namespace dbus { 14 15 class Bus; 16 class ObjectProxy; 17 18 } // namespace dbus 19 20 namespace chromeos { 21 22 // A utility class to call D-Bus methods in a synchronous (blocking) way. 23 // Note: Blocking the thread until it returns is not a good idea in most cases. 24 // Avoid using this class as hard as you can. 25 class CHROMEOS_EXPORT BlockingMethodCaller { 26 public: 27 BlockingMethodCaller(dbus::Bus* bus, dbus::ObjectProxy* proxy); 28 virtual ~BlockingMethodCaller(); 29 30 // Calls the method and blocks until it returns. 31 scoped_ptr<dbus::Response> CallMethodAndBlock(dbus::MethodCall* method_call); 32 33 private: 34 dbus::Bus* bus_; 35 dbus::ObjectProxy* proxy_; 36 base::WaitableEvent on_blocking_method_call_; 37 38 DISALLOW_COPY_AND_ASSIGN(BlockingMethodCaller); 39 }; 40 41 } // namespace chromeos 42 43 #endif // CHROMEOS_DBUS_BLOCKING_METHOD_CALLER_H_ 44
