| // 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. |
| |
| #include "base/task/thread_pool/task.h" |
| |
| #include <utility> |
| |
| #include "base/atomic_sequence_num.h" |
| |
| namespace base { |
| namespace internal { |
| |
| namespace { |
| |
| AtomicSequenceNumber g_sequence_nums_for_tracing; |
| |
| } // namespace |
| |
| Task::Task() = default; |
| |
| Task::Task(const Location& posted_from, OnceClosure task, TimeDelta delay) |
| : PendingTask(posted_from, |
| std::move(task), |
| delay.is_zero() ? TimeTicks() : TimeTicks::Now() + delay, |
| Nestable::kNonNestable) { |
| // ThreadPoolImpl doesn't use |sequence_num| but tracing (toplevel.flow) |
| // relies on it being unique. While this subtle dependency is a bit |
| // overreaching, ThreadPoolImpl is the only task system that doesn't use |
| // |sequence_num| and the dependent code rarely changes so this isn't worth a |
| // big change and faking it here isn't too bad for now (posting tasks is full |
| // of atomic ops already). |
| this->sequence_num = g_sequence_nums_for_tracing.GetNext(); |
| } |
| |
| // This should be "= default but MSVC has trouble with "noexcept = default" in |
| // this case. |
| Task::Task(Task&& other) noexcept : PendingTask(std::move(other)) {} |
| |
| Task::~Task() = default; |
| |
| Task& Task::operator=(Task&& other) = default; |
| |
| } // namespace internal |
| } // namespace base |