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 #include "chromeos/dbus/blocking_method_caller.h" 6 7 #include "base/bind.h" 8 #include "base/location.h" 9 #include "base/threading/thread_restrictions.h" 10 #include "dbus/bus.h" 11 #include "dbus/object_proxy.h" 12 13 namespace chromeos { 14 15 namespace { 16 17 // This function is a part of CallMethodAndBlock implementation. 18 void CallMethodAndBlockInternal( 19 scoped_ptr<dbus::Response>* response, 20 base::ScopedClosureRunner* signaler, 21 dbus::ObjectProxy* proxy, 22 dbus::MethodCall* method_call) { 23 *response = proxy->CallMethodAndBlock( 24 method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT); 25 } 26 27 } // namespace 28 29 BlockingMethodCaller::BlockingMethodCaller(dbus::Bus* bus, 30 dbus::ObjectProxy* proxy) 31 : bus_(bus), 32 proxy_(proxy), 33 on_blocking_method_call_(false /* manual_reset */, 34 false /* initially_signaled */) { 35 } 36 37 BlockingMethodCaller::~BlockingMethodCaller() { 38 } 39 40 scoped_ptr<dbus::Response> BlockingMethodCaller::CallMethodAndBlock( 41 dbus::MethodCall* method_call) { 42 // on_blocking_method_call_->Signal() will be called when |signaler| is 43 // destroyed. 44 base::Closure signal_task( 45 base::Bind(&base::WaitableEvent::Signal, 46 base::Unretained(&on_blocking_method_call_))); 47 base::ScopedClosureRunner* signaler = 48 new base::ScopedClosureRunner(signal_task); 49 50 scoped_ptr<dbus::Response> response; 51 bus_->PostTaskToDBusThread( 52 FROM_HERE, 53 base::Bind(&CallMethodAndBlockInternal, 54 &response, 55 base::Owned(signaler), 56 base::Unretained(proxy_), 57 method_call)); 58 // http://crbug.com/125360 59 base::ThreadRestrictions::ScopedAllowWait allow_wait; 60 on_blocking_method_call_.Wait(); 61 return response.Pass(); 62 } 63 64 } // namespace chromeos 65
