/*
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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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#ifndef TEST_TASK_RUNNER_THREAD_H_
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#define TEST_TASK_RUNNER_THREAD_H_
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#include <condition_variable>
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#include <mutex>
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#include <thread>
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#include "perfetto/base/task_runner.h"
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#include "src/base/test/test_task_runner.h"
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namespace perfetto {
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// Used to perform initialization work on a background TaskRunnerThread.
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class ThreadDelegate {
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public:
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virtual ~ThreadDelegate();
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// Invoked on the target thread before the message loop is started.
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virtual void Initialize(base::TaskRunner* task_runner) = 0;
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};
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// Background thread which spins a task runner until completed or the thread is
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// destroyed. If the thread is destroyed before the task runner completes, the
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// task runner is quit and the thread is joined.
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class TaskRunnerThread {
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public:
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explicit TaskRunnerThread(const char* name);
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~TaskRunnerThread();
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// Blocks until the thread has been created and Initialize() has been
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// called.
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void Start(std::unique_ptr<ThreadDelegate> delegate);
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// Blocks until the thread has been stopped and joined.
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void Stop();
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uint64_t GetThreadCPUTimeNs();
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private:
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void Run(std::unique_ptr<ThreadDelegate> delegate);
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const char* const name_;
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std::thread thread_;
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std::condition_variable ready_;
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// All variables below this point are protected by |mutex_|.
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std::mutex mutex_;
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base::PlatformTaskRunner* runner_ = nullptr;
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};
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} // namespace perfetto
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#endif // TEST_TASK_RUNNER_THREAD_H_
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