base/test/test_task_runner.h

/*
 * 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.
 */

#ifndef TRACING_SRC_TEST_TEST_TASK_RUNNER_H_
#define TRACING_SRC_TEST_TEST_TASK_RUNNER_H_

#include <sys/select.h>

#include <functional>
#include <list>
#include <map>

#include "base/task_runner.h"

namespace perfetto {
namespace base {

class TestTaskRunner : public TaskRunner {
 public:
  TestTaskRunner();
  ~TestTaskRunner() override;

  void Run();

  // Returns false in case of errors.
  bool RunUntilIdle();

  // TaskRunner implementation.
  void PostTask(std::function<void()> closure) override;
  void AddFileDescriptorWatch(int fd, std::function<void()> callback) override;
  void RemoveFileDescriptorWatch(int fd) override;

 private:
  TestTaskRunner(const TestTaskRunner&) = delete;
  TestTaskRunner& operator=(const TestTaskRunner&) = delete;

  // Returns false in case of errors.
  bool RunFileDescriptorWatches(int timeout_ms);

  std::list<std::function<void()>> task_queue_;
  std::map<int, std::function<void()>> watched_fds_;
};

}  // namespace base
}  // namespace perfetto

#endif  // TRACING_SRC_TEST_TEST_TASK_RUNNER_H_