base/task/thread_pool/task.h

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_TASK_THREAD_POOL_TASK_H_
#define BASE_TASK_THREAD_POOL_TASK_H_

#include "base/base_export.h"
#include "base/callback.h"
#include "base/location.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/pending_task.h"
#include "base/sequenced_task_runner.h"
#include "base/single_thread_task_runner.h"
#include "base/time/time.h"

namespace base {
namespace internal {

// A task is a unit of work inside the thread pool. Support for tracing and
// profiling inherited from PendingTask.
// TODO(etiennep): This class is now equivalent to PendingTask, remove it.
struct BASE_EXPORT Task : public PendingTask {
  Task();

  // |posted_from| is the site the task was posted from. |task| is the closure
  // to run. |delay| is a delay that must expire before the Task runs.
  Task(const Location& posted_from, OnceClosure task, TimeDelta delay);

  // Task is move-only to avoid mistakes that cause reference counts to be
  // accidentally bumped.
  Task(Task&& other) noexcept;

  ~Task();

  Task& operator=(Task&& other);

 private:
  DISALLOW_COPY_AND_ASSIGN(Task);
};

}  // namespace internal
}  // namespace base

#endif  // BASE_TASK_THREAD_POOL_TASK_H_