| /* |
| * Copyright (C) 2020 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 "TraceProviderFuchsia.h" |
| |
| #include <log/log.h> |
| |
| #include <lib/async/cpp/task.h> |
| #include <lib/zx/channel.h> |
| |
| #include "services/service_connector.h" |
| |
| TraceProviderFuchsia::~TraceProviderFuchsia() { |
| if (mTraceProvider) { |
| async::PostTask(mLoop.dispatcher(), [this]() { |
| // trace_provider_.reset() needs to run on loop_'s dispatcher or |
| // else its teardown can be racy and crash. |
| mTraceProvider.reset(); |
| // Run Quit() in the loop to ensure this task executes before |
| // JoinThreads() returns and the destructor finishes. |
| mLoop.Quit(); |
| }); |
| } else { |
| mLoop.Quit(); |
| } |
| mLoop.JoinThreads(); |
| } |
| |
| TraceProviderFuchsia::TraceProviderFuchsia() |
| : mLoop(&kAsyncLoopConfigNeverAttachToThread) {} |
| |
| bool TraceProviderFuchsia::Initialize() { |
| // Connect to fuchsia.tracing.provider.Registry service. |
| zx_handle_t client_channel = |
| GetConnectToServiceFunction()("/svc/fuchsia.tracing.provider.Registry"); |
| if (client_channel == ZX_HANDLE_INVALID) { |
| ALOGE("Failed to connect to tracing provider service"); |
| return false; |
| } |
| |
| zx_status_t status = mLoop.StartThread(); |
| if (status != ZX_OK) { |
| ALOGE("Failed to start async loop: %d", status); |
| return false; |
| } |
| |
| mTraceProvider = std::make_unique<trace::TraceProvider>( |
| zx::channel(client_channel), mLoop.dispatcher()); |
| return true; |
| } |