| // 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_SCHEDULER_SEQUENCE_SORT_KEY_H_ |
| #define BASE_TASK_SCHEDULER_SEQUENCE_SORT_KEY_H_ |
| |
| #include "base/base_export.h" |
| #include "base/task_scheduler/task_traits.h" |
| #include "base/time/time.h" |
| |
| namespace base { |
| namespace internal { |
| |
| // An immutable but assignable representation of the priority of a Sequence. |
| class BASE_EXPORT SequenceSortKey final { |
| public: |
| SequenceSortKey(TaskPriority priority, TimeTicks next_task_sequenced_time); |
| |
| TaskPriority priority() const { return priority_; } |
| |
| bool operator<(const SequenceSortKey& other) const; |
| bool operator>(const SequenceSortKey& other) const { return other < *this; } |
| |
| bool operator==(const SequenceSortKey& other) const { |
| return priority_ == other.priority_ && |
| next_task_sequenced_time_ == other.next_task_sequenced_time_; |
| } |
| bool operator!=(const SequenceSortKey& other) const { |
| return !(other == *this); |
| }; |
| |
| private: |
| // The private section allows this class to keep its immutable property while |
| // being copy-assignable (i.e. instead of making its members const). |
| |
| // Highest task priority in the sequence at the time this sort key was |
| // created. |
| TaskPriority priority_; |
| |
| // Sequenced time of the next task to run in the sequence at the time this |
| // sort key was created. |
| TimeTicks next_task_sequenced_time_; |
| }; |
| |
| } // namespace internal |
| } // namespace base |
| |
| #endif // BASE_TASK_SCHEDULER_SEQUENCE_SORT_KEY_H_ |