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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "perfetto/ext/ipc/service_proxy.h"
#include <utility>
#include "perfetto/base/logging.h"
#include "perfetto/ext/base/weak_ptr.h"
#include "perfetto/ext/ipc/service_descriptor.h"
#include "src/ipc/client_impl.h"
namespace perfetto {
namespace ipc {
ServiceProxy::ServiceProxy(EventListener* event_listener)
: event_listener_(event_listener), weak_ptr_factory_(this) {}
ServiceProxy::~ServiceProxy() {
if (client_ && connected())
client_->UnbindService(service_id_);
}
void ServiceProxy::InitializeBinding(
base::WeakPtr<Client> client,
ServiceID service_id,
std::map<std::string, MethodID> remote_method_ids) {
client_ = std::move(client);
service_id_ = service_id;
remote_method_ids_ = std::move(remote_method_ids);
}
void ServiceProxy::BeginInvoke(const std::string& method_name,
const ProtoMessage& request,
DeferredBase reply,
int fd) {
// |reply| will auto-resolve if it gets out of scope early.
if (!connected()) {
PERFETTO_DFATAL("Not connected.");
return;
}
if (!client_)
return; // The Client object has been destroyed in the meantime.
auto remote_method_it = remote_method_ids_.find(method_name);
RequestID request_id = 0;
const bool drop_reply = !reply.IsBound();
if (remote_method_it != remote_method_ids_.end()) {
request_id =
static_cast<ClientImpl*>(client_.get())
->BeginInvoke(service_id_, method_name, remote_method_it->second,
request, drop_reply, weak_ptr_factory_.GetWeakPtr(),
fd);
} else {
PERFETTO_DLOG("Cannot find method \"%s\" on the host", method_name.c_str());
}
// When passing |drop_reply| == true, the returned |request_id| should be 0.
PERFETTO_DCHECK(!drop_reply || !request_id);
if (!request_id)
return;
PERFETTO_DCHECK(pending_callbacks_.count(request_id) == 0);
pending_callbacks_.emplace(request_id, std::move(reply));
}
void ServiceProxy::EndInvoke(RequestID request_id,
std::unique_ptr<ProtoMessage> result,
bool has_more) {
auto callback_it = pending_callbacks_.find(request_id);
if (callback_it == pending_callbacks_.end()) {
// Either we are getting a reply for a method we never invoked, or we are
// getting a reply to a method marked drop_reply (that has been invoked
// without binding any callback in the Defererd response object).
PERFETTO_DFATAL("Unexpected reply received.");
return;
}
DeferredBase& reply_callback = callback_it->second;
AsyncResult<ProtoMessage> reply(std::move(result), has_more);
reply_callback.Resolve(std::move(reply));
if (!has_more)
pending_callbacks_.erase(callback_it);
}
void ServiceProxy::OnConnect(bool success) {
if (success) {
PERFETTO_DCHECK(service_id_);
return event_listener_->OnConnect();
}
return event_listener_->OnDisconnect();
}
void ServiceProxy::OnDisconnect() {
pending_callbacks_.clear(); // Will Reject() all the pending callbacks.
event_listener_->OnDisconnect();
}
base::WeakPtr<ServiceProxy> ServiceProxy::GetWeakPtr() const {
return weak_ptr_factory_.GetWeakPtr();
}
} // namespace ipc
} // namespace perfetto
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