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// 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(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::operator=(Task&& other) = default;
} // namespace internal
} // namespace base
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