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/callback_helpers.h" 9 #include "base/location.h" 10 #include "base/task_runner.h" 11 #include "base/threading/thread_restrictions.h" 12 #include "dbus/bus.h" 13 #include "dbus/object_proxy.h" 14 15 namespace chromeos { 16 17 namespace { 18 19 // This function is a part of CallMethodAndBlock implementation. 20 void CallMethodAndBlockInternal( 21 scoped_ptr<dbus::Response>* response, 22 base::ScopedClosureRunner* signaler, 23 dbus::ObjectProxy* proxy, 24 dbus::MethodCall* method_call) { 25 *response = proxy->CallMethodAndBlock( 26 method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT); 27 } 28 29 } // namespace 30 31 BlockingMethodCaller::BlockingMethodCaller(dbus::Bus* bus, 32 dbus::ObjectProxy* proxy) 33 : bus_(bus), 34 proxy_(proxy), 35 on_blocking_method_call_(false /* manual_reset */, 36 false /* initially_signaled */) { 37 } 38 39 BlockingMethodCaller::~BlockingMethodCaller() { 40 } 41 42 scoped_ptr<dbus::Response> BlockingMethodCaller::CallMethodAndBlock( 43 dbus::MethodCall* method_call) { 44 // on_blocking_method_call_->Signal() will be called when |signaler| is 45 // destroyed. 46 base::Closure signal_task( 47 base::Bind(&base::WaitableEvent::Signal, 48 base::Unretained(&on_blocking_method_call_))); 49 base::ScopedClosureRunner* signaler = 50 new base::ScopedClosureRunner(signal_task); 51 52 scoped_ptr<dbus::Response> response; 53 bus_->GetDBusTaskRunner()->PostTask( 54 FROM_HERE, 55 base::Bind(&CallMethodAndBlockInternal, 56 &response, 57 base::Owned(signaler), 58 base::Unretained(proxy_), 59 method_call)); 60 // http://crbug.com/125360 61 base::ThreadRestrictions::ScopedAllowWait allow_wait; 62 on_blocking_method_call_.Wait(); 63 return response.Pass(); 64 } 65 66 } // namespace chromeos 67
