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_; } next_task_sequenced_time()21 TimeTicks next_task_sequenced_time() const { 22 return next_task_sequenced_time_; 23 } 24 25 bool operator<(const SequenceSortKey& other) const; 26 bool operator>(const SequenceSortKey& other) const { return other < *this; } 27 28 bool operator==(const SequenceSortKey& other) const { 29 return priority_ == other.priority_ && 30 next_task_sequenced_time_ == other.next_task_sequenced_time_; 31 } 32 bool operator!=(const SequenceSortKey& other) const { 33 return !(other == *this); 34 }; 35 36 private: 37 // The private section allows this class to keep its immutable property while 38 // being copy-assignable (i.e. instead of making its members const). 39 40 // Highest task priority in the sequence at the time this sort key was 41 // created. 42 TaskPriority priority_; 43 44 // Sequenced time of the next task to run in the sequence at the time this 45 // sort key was created. 46 TimeTicks next_task_sequenced_time_; 47 }; 48 49 } // namespace internal 50 } // namespace base 51 52 #endif // BASE_TASK_SCHEDULER_SEQUENCE_SORT_KEY_H_ 53