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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/task/sequence_manager/tasks.h"
#include <variant>
#include "base/task/sequence_manager/task_order.h"
namespace base::sequence_manager {
Task::Task(internal::PostedTask posted_task,
EnqueueOrder sequence_order,
EnqueueOrder enqueue_order,
TimeTicks queue_time,
TimeDelta leeway)
: PendingTask(
posted_task.location,
std::move(posted_task.callback),
queue_time,
std::holds_alternative<base::TimeTicks>(
posted_task.delay_or_delayed_run_time)
? std::get<base::TimeTicks>(posted_task.delay_or_delayed_run_time)
: base::TimeTicks(),
leeway,
posted_task.delay_policy),
nestable(posted_task.nestable),
task_type(posted_task.task_type),
task_runner(std::move(posted_task.task_runner)),
enqueue_order_(enqueue_order),
delayed_task_handle_delegate_(
std::move(posted_task.delayed_task_handle_delegate)) {
DCHECK(!std::holds_alternative<base::TimeDelta>(
posted_task.delay_or_delayed_run_time) ||
std::get<base::TimeDelta>(posted_task.delay_or_delayed_run_time)
.is_zero());
// We use |sequence_num| when comparing PendingTask for ordering purposes
// and it may wrap around to a negative number during the static cast, hence,
// TaskQueueImpl::DelayedIncomingQueue is especially sensitive to a potential
// change of |PendingTask::sequence_num|'s type.
static_assert(std::is_same_v<decltype(sequence_num), int>, "");
sequence_num = static_cast<int>(sequence_order);
}
Task::Task(Task&& move_from) = default;
Task::~Task() = default;
Task& Task::operator=(Task&& other) = default;
TaskOrder Task::task_order() const {
return TaskOrder(
enqueue_order(),
delayed_run_time.is_null() ? TimeTicks() : latest_delayed_run_time(),
sequence_num);
}
void Task::SetHeapHandle(HeapHandle heap_handle) {
if (!delayed_task_handle_delegate_) {
return;
}
delayed_task_handle_delegate_->SetHeapHandle(heap_handle);
}
void Task::ClearHeapHandle() {
if (!delayed_task_handle_delegate_) {
return;
}
delayed_task_handle_delegate_->ClearHeapHandle();
}
HeapHandle Task::GetHeapHandle() const {
if (!delayed_task_handle_delegate_) {
return HeapHandle::Invalid();
}
return delayed_task_handle_delegate_->GetHeapHandle();
}
bool Task::IsCanceled() const {
CHECK(task);
if (task.IsCancelled()) {
return true;
}
return delayed_task_handle_delegate_.WasInvalidated();
}
bool Task::WillRunTask() {
if (delayed_task_handle_delegate_.WasInvalidated()) {
return false;
}
if (delayed_task_handle_delegate_) {
delayed_task_handle_delegate_->WillRunTask();
}
return true;
}
TimeTicks WakeUp::earliest_time() const {
if (delay_policy == subtle::DelayPolicy::kFlexiblePreferEarly) {
return time - leeway;
}
return time;
}
TimeTicks WakeUp::latest_time() const {
if (delay_policy == subtle::DelayPolicy::kFlexibleNoSooner) {
return time + leeway;
}
return time;
}
namespace internal {
PostedTask::PostedTask(
scoped_refptr<SequencedTaskRunner> task_runner,
OnceClosure callback,
Location location,
TimeDelta delay,
Nestable nestable,
TaskType task_type,
WeakPtr<DelayedTaskHandleDelegate> delayed_task_handle_delegate)
: callback(std::move(callback)),
location(location),
nestable(nestable),
task_type(task_type),
delay_or_delayed_run_time(delay),
task_runner(std::move(task_runner)),
delayed_task_handle_delegate(std::move(delayed_task_handle_delegate)) {}
PostedTask::PostedTask(
scoped_refptr<SequencedTaskRunner> task_runner,
OnceClosure callback,
Location location,
TimeTicks delayed_run_time,
subtle::DelayPolicy delay_policy,
Nestable nestable,
TaskType task_type,
WeakPtr<DelayedTaskHandleDelegate> delayed_task_handle_delegate)
: callback(std::move(callback)),
location(location),
nestable(nestable),
task_type(task_type),
delay_or_delayed_run_time(delayed_run_time),
delay_policy(delay_policy),
task_runner(std::move(task_runner)),
delayed_task_handle_delegate(std::move(delayed_task_handle_delegate)) {}
PostedTask::PostedTask(PostedTask&& move_from) noexcept = default;
PostedTask::~PostedTask() = default;
} // namespace internal
} // namespace base::sequence_manager
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