third_party/WebKit/Source/platform/scheduler/base/sequence.h

// Copyright 2017 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 THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_SEQUENCE_H_
#define THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_SEQUENCE_H_

#include "base/optional.h"
#include "base/pending_task.h"

namespace blink {
namespace scheduler {
namespace internal {

// This is temporary interface for ThreadController to be able to run tasks
// from TaskQueueManager.
class Sequence {
 public:
  enum class WorkType { kImmediate, kDelayed };

  // Take a next task to run from a sequence.
  // TODO(altimin): Do not pass |work_type| here.
  virtual base::Optional<base::PendingTask> TakeTask(WorkType work_type) = 0;

  // Notify a sequence that a taken task has been completed.
  // Returns true if sequence has more work to do.
  virtual bool DidRunTask() = 0;
};

}  // namespace internal
}  // namespace scheduler
}  // namespace blink

#endif  // THIRD_PARTY_WEBKIT_SOURCE_PLATFORM_SCHEDULER_BASE_SEQUENCE_H_