1 // Copyright 2016 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_TASK_SCHEDULER_SEQUENCE_SORT_KEY_H_ 6 #define BASE_TASK_SCHEDULER_SEQUENCE_SORT_KEY_H_ 7 8 #include "base/base_export.h" 9 #include "base/task_scheduler/task_traits.h" 10 #include "base/time/time.h" 11 12 namespace base { 13 namespace internal { 14 15 // An immutable but assignable representation of the priority of a Sequence. 16 class BASE_EXPORT SequenceSortKey final { 17 public: 18 SequenceSortKey(TaskPriority priority, TimeTicks next_task_sequenced_time); 19 priority()20 TaskPriority priority() const { return priority_; } 21 22 bool operator<(const SequenceSortKey& other) const; 23 bool operator>(const SequenceSortKey& other) const { return other < *this; } 24 25 bool operator==(const SequenceSortKey& other) const { 26 return priority_ == other.priority_ && 27 next_task_sequenced_time_ == other.next_task_sequenced_time_; 28 } 29 bool operator!=(const SequenceSortKey& other) const { 30 return !(other == *this); 31 }; 32 33 private: 34 // The private section allows this class to keep its immutable property while 35 // being copy-assignable (i.e. instead of making its members const). 36 37 // Highest task priority in the sequence at the time this sort key was 38 // created. 39 TaskPriority priority_; 40 41 // Sequenced time of the next task to run in the sequence at the time this 42 // sort key was created. 43 TimeTicks next_task_sequenced_time_; 44 }; 45 46 } // namespace internal 47 } // namespace base 48 49 #endif // BASE_TASK_SCHEDULER_SEQUENCE_SORT_KEY_H_ 50