| // Copyright (c) 2012 The Chromium OS 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 <base/at_exit.h> |
| #include <base/bind.h> |
| #include <base/command_line.h> |
| #include <base/logging.h> |
| #include <base/memory/ref_counted.h> |
| #include <base/message_loop/message_loop.h> |
| #include <base/time/time.h> |
| #include <chromeos/dbus/service_constants.h> |
| #include <chromeos/flag_helper.h> |
| #include <dbus/bus.h> |
| #include <dbus/message.h> |
| #include <dbus/object_proxy.h> |
| |
| #include "power_manager/proto_bindings/suspend.pb.h" |
| |
| namespace { |
| |
| // Human-readable description of the delay's purpose. |
| const char kSuspendDelayDescription[] = "suspend_delay_sample"; |
| |
| } // namespace |
| |
| // Passes |request| to powerd's |method_name| D-Bus method. |
| // Copies the returned protocol buffer to |reply_out|, which may be NULL if no |
| // reply is expected. |
| bool CallMethod(dbus::ObjectProxy* powerd_proxy, |
| const std::string& method_name, |
| const google::protobuf::MessageLite& request, |
| google::protobuf::MessageLite* reply_out) { |
| LOG(INFO) << "Calling " << method_name << " method"; |
| dbus::MethodCall method_call( |
| power_manager::kPowerManagerInterface, method_name); |
| dbus::MessageWriter writer(&method_call); |
| writer.AppendProtoAsArrayOfBytes(request); |
| |
| scoped_ptr<dbus::Response> response( |
| powerd_proxy->CallMethodAndBlock( |
| &method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT)); |
| if (!response) |
| return false; |
| if (!reply_out) |
| return true; |
| |
| dbus::MessageReader reader(response.get()); |
| CHECK(reader.PopArrayOfBytesAsProto(reply_out)) |
| << "Unable to parse response from call to " << method_name; |
| return true; |
| } |
| |
| // Registers a suspend delay and returns the corresponding ID. |
| int RegisterSuspendDelay(dbus::ObjectProxy* powerd_proxy, |
| int timeout_ms) { |
| power_manager::RegisterSuspendDelayRequest request; |
| request.set_timeout( |
| base::TimeDelta::FromMilliseconds(timeout_ms).ToInternalValue()); |
| request.set_description(kSuspendDelayDescription); |
| power_manager::RegisterSuspendDelayReply reply; |
| CHECK(CallMethod(powerd_proxy, power_manager::kRegisterSuspendDelayMethod, |
| request, &reply)); |
| LOG(INFO) << "Registered delay " << reply.delay_id(); |
| return reply.delay_id(); |
| } |
| |
| // Announces that the process is ready for suspend attempt |suspend_id|. |
| void SendSuspendReady(scoped_refptr<dbus::ObjectProxy> powerd_proxy, |
| int delay_id, |
| int suspend_id) { |
| LOG(INFO) << "Announcing readiness of delay " << delay_id |
| << " for suspend attempt " << suspend_id; |
| power_manager::SuspendReadinessInfo request; |
| request.set_delay_id(delay_id); |
| request.set_suspend_id(suspend_id); |
| CallMethod(powerd_proxy.get(), power_manager::kHandleSuspendReadinessMethod, |
| request, NULL); |
| } |
| |
| // Handles the start of a suspend attempt. Posts a task to run |
| // SendSuspendReady() after a delay. |
| void HandleSuspendImminent(scoped_refptr<dbus::ObjectProxy> powerd_proxy, |
| int delay_id, |
| int delay_ms, |
| dbus::Signal* signal) { |
| power_manager::SuspendImminent info; |
| dbus::MessageReader reader(signal); |
| CHECK(reader.PopArrayOfBytesAsProto(&info)); |
| int suspend_id = info.suspend_id(); |
| |
| LOG(INFO) << "Got notification about suspend attempt " << suspend_id; |
| LOG(INFO) << "Sleeping " << delay_ms << " ms before responding"; |
| base::MessageLoop::current()->PostDelayedTask(FROM_HERE, |
| base::Bind(&SendSuspendReady, powerd_proxy, delay_id, suspend_id), |
| base::TimeDelta::FromMilliseconds(delay_ms)); |
| } |
| |
| // Handles the completion of a suspend attempt. |
| void HandleSuspendDone(dbus::Signal* signal) { |
| power_manager::SuspendDone info; |
| dbus::MessageReader reader(signal); |
| CHECK(reader.PopArrayOfBytesAsProto(&info)); |
| const base::TimeDelta duration = |
| base::TimeDelta::FromInternalValue(info.suspend_duration()); |
| LOG(INFO) << "Suspend attempt " << info.suspend_id() << " is complete; " |
| << "system was suspended for " << duration.InMilliseconds() |
| << " ms"; |
| } |
| |
| // Handles the result of an attempt to connect to a D-Bus signal. |
| void DBusSignalConnected(const std::string& interface, |
| const std::string& signal, |
| bool success) { |
| CHECK(success) << "Unable to connect to " << interface << "." << signal; |
| } |
| |
| int main(int argc, char* argv[]) { |
| DEFINE_int32(delay_ms, 5000, |
| "Milliseconds to wait before reporting suspend readiness"); |
| DEFINE_int32(timeout_ms, 7000, "Suspend timeout in milliseconds"); |
| |
| chromeos::FlagHelper::Init(argc, argv, |
| "Exercise powerd's functionality that permits other processes to\n" |
| "perform last-minute work before the system suspends."); |
| base::AtExitManager at_exit_manager; |
| base::MessageLoopForIO message_loop; |
| |
| dbus::Bus::Options options; |
| options.bus_type = dbus::Bus::SYSTEM; |
| scoped_refptr<dbus::Bus> bus(new dbus::Bus(options)); |
| CHECK(bus->Connect()); |
| |
| dbus::ObjectProxy* powerd_proxy = bus->GetObjectProxy( |
| power_manager::kPowerManagerServiceName, |
| dbus::ObjectPath(power_manager::kPowerManagerServicePath)); |
| const int delay_id = RegisterSuspendDelay(powerd_proxy, FLAGS_timeout_ms); |
| powerd_proxy->ConnectToSignal( |
| power_manager::kPowerManagerInterface, |
| power_manager::kSuspendImminentSignal, |
| base::Bind(&HandleSuspendImminent, make_scoped_refptr(powerd_proxy), |
| delay_id, FLAGS_delay_ms), |
| base::Bind(&DBusSignalConnected)); |
| powerd_proxy->ConnectToSignal( |
| power_manager::kPowerManagerInterface, |
| power_manager::kSuspendDoneSignal, |
| base::Bind(&HandleSuspendDone), |
| base::Bind(&DBusSignalConnected)); |
| |
| message_loop.Run(); |
| |
| // powerd will automatically unregister this process's suspend delay when the |
| // process disconnects from D-Bus. |
| return 0; |
| } |