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arc_midis_client.cc
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arc_midis_client.cc
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// Copyright 2017 The Chromium 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 "chromeos/dbus/arc_midis_client.h"
#include <memory>
#include <utility>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/callback.h"
#include "dbus/bus.h"
#include "dbus/message.h"
#include "dbus/object_proxy.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace chromeos {
namespace {
// ArcMidisClient is used to bootstrap a Mojo connection with midis.
// The BootstrapMojoConnection callback should be called during browser
// initialization. It is expected that the midis will be started up / taken down
// during browser startup / shutdown respectively.
class ArcMidisClientImpl : public ArcMidisClient {
public:
ArcMidisClientImpl() : weak_ptr_factory_(this) {}
~ArcMidisClientImpl() override = default;
void BootstrapMojoConnection(base::ScopedFD fd,
VoidDBusMethodCallback callback) override {
dbus::MethodCall method_call(midis::kMidisInterfaceName,
midis::kBootstrapMojoConnectionMethod);
dbus::MessageWriter writer(&method_call);
writer.AppendFileDescriptor(fd.get());
proxy_->CallMethod(
&method_call, dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::BindOnce(&ArcMidisClientImpl::OnVoidDBusMethod,
weak_ptr_factory_.GetWeakPtr(), std::move(callback)));
}
protected:
void Init(dbus::Bus* bus) override {
proxy_ = bus->GetObjectProxy(midis::kMidisServiceName,
dbus::ObjectPath(midis::kMidisServicePath));
}
private:
void OnVoidDBusMethod(VoidDBusMethodCallback callback,
dbus::Response* response) {
std::move(callback).Run(response != nullptr);
}
dbus::ObjectProxy* proxy_ = nullptr;
// Note: This should remain the last member so it'll be destroyed and
// invalidate its weak pointers before any other members are destroyed.
base::WeakPtrFactory<ArcMidisClientImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(ArcMidisClientImpl);
};
} // namespace
////////////////////////////////////////////////////////////////////////////////
// ArcMidisClient
// static
std::unique_ptr<ArcMidisClient> ArcMidisClient::Create() {
return std::make_unique<ArcMidisClientImpl>();
}
} // namespace chromeos