blocking_method_caller.h revision 5821806d5e7f356e8fa4b058a389a808ea183019
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef CHROMEOS_DBUS_BLOCKING_METHOD_CALLER_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define CHROMEOS_DBUS_BLOCKING_METHOD_CALLER_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/callback.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/synchronization/waitable_event.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "chromeos/chromeos_export.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace dbus { 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class Bus; 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class ObjectProxy; 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class MethodCall; 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class Response; 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace dbus 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace chromeos { 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A utility class to call D-Bus methods in a synchronous (blocking) way. 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Note: Blocking the thread until it returns is not a good idea in most cases. 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Avoid using this class as hard as you can. 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class CHROMEOS_EXPORT BlockingMethodCaller { 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BlockingMethodCaller(dbus::Bus* bus, dbus::ObjectProxy* proxy); 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~BlockingMethodCaller(); 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Calls the method and blocks until it returns. 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The caller is responsible to delete the returned object. 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dbus::Response* CallMethodAndBlock(dbus::MethodCall* method_call); 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dbus::Bus* bus_; 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dbus::ObjectProxy* proxy_; 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::WaitableEvent on_blocking_method_call_; 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(BlockingMethodCaller); 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace chromeos 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // CHROMEOS_DBUS_BLOCKING_METHOD_CALLER_H_ 46