/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <pthread.h>
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#include <stdlib.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <condition_variable>
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#include <thread>
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#include "perfetto/base/file_utils.h"
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#include "perfetto/base/string_splitter.h"
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#include "perfetto/base/time.h"
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#include "test/task_runner_thread.h"
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namespace perfetto {
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TaskRunnerThread::TaskRunnerThread(const char* name) : name_(name) {}
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TaskRunnerThread::~TaskRunnerThread() {
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Stop();
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}
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void TaskRunnerThread::Start(std::unique_ptr<ThreadDelegate> delegate) {
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// Begin holding the lock for the condition variable.
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std::unique_lock<std::mutex> lock(mutex_);
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// Start the thread.
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PERFETTO_DCHECK(!runner_);
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thread_ = std::thread(&TaskRunnerThread::Run, this, std::move(delegate));
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// Wait for runner to be ready.
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ready_.wait_for(lock, std::chrono::seconds(10),
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[this]() { return runner_ != nullptr; });
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}
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void TaskRunnerThread::Stop() {
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{
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std::unique_lock<std::mutex> lock(mutex_);
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if (runner_)
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runner_->Quit();
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}
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if (thread_.joinable())
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thread_.join();
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}
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uint64_t TaskRunnerThread::GetThreadCPUTimeNs() {
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std::condition_variable cv;
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std::unique_lock<std::mutex> lock(mutex_);
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uint64_t thread_time_ns = 0;
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if (!runner_)
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return 0;
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runner_->PostTask([this, &thread_time_ns, &cv] {
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std::unique_lock<std::mutex> inner_lock(mutex_);
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thread_time_ns = static_cast<uint64_t>(base::GetThreadCPUTimeNs().count());
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cv.notify_one();
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});
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cv.wait(lock, [&thread_time_ns] { return thread_time_ns != 0; });
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return thread_time_ns;
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}
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void TaskRunnerThread::Run(std::unique_ptr<ThreadDelegate> delegate) {
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#if PERFETTO_BUILDFLAG(PERFETTO_OS_MACOSX)
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pthread_setname_np(name_);
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#else
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pthread_setname_np(pthread_self(), name_);
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#endif
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// Create the task runner and execute the specicalised code.
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base::PlatformTaskRunner task_runner;
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delegate->Initialize(&task_runner);
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// Pass the runner back to the main thread.
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{
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std::unique_lock<std::mutex> lock(mutex_);
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runner_ = &task_runner;
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}
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// Notify the main thread that the runner is ready.
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ready_.notify_one();
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// Spin the loop.
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task_runner.Run();
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// Ensure we clear out the delegate before runner goes out
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// of scope.
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delegate.reset();
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// Cleanup the runner.
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{
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std::unique_lock<std::mutex> lock(mutex_);
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runner_ = nullptr;
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}
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}
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ThreadDelegate::~ThreadDelegate() = default;
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} // namespace perfetto
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