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122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/message_loop/pending_task_queue.h"
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#include <utility>
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#include "base/logging.h"
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#include "base/metrics/histogram_macros.h"
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#include "build/build_config.h"
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namespace base {
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namespace internal {
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PendingTaskQueue::PendingTaskQueue() = default;
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PendingTaskQueue::~PendingTaskQueue() = default;
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void PendingTaskQueue::ReportMetricsOnIdle() const {
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UMA_HISTOGRAM_COUNTS_1M(
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"MessageLoop.DelayedTaskQueueForUI.PendingTasksCountOnIdle",
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delayed_tasks_.Size());
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}
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PendingTaskQueue::DelayedQueue::DelayedQueue() {
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// The constructing sequence is not necessarily the running sequence, e.g. in
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// the case of a MessageLoop created unbound.
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DETACH_FROM_SEQUENCE(sequence_checker_);
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}
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PendingTaskQueue::DelayedQueue::~DelayedQueue() = default;
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void PendingTaskQueue::DelayedQueue::Push(PendingTask pending_task) {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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if (pending_task.is_high_res)
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++pending_high_res_tasks_;
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queue_.push(std::move(pending_task));
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}
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const PendingTask& PendingTaskQueue::DelayedQueue::Peek() {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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DCHECK(!queue_.empty());
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return queue_.top();
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}
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PendingTask PendingTaskQueue::DelayedQueue::Pop() {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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DCHECK(!queue_.empty());
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PendingTask delayed_task = std::move(const_cast<PendingTask&>(queue_.top()));
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queue_.pop();
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if (delayed_task.is_high_res)
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--pending_high_res_tasks_;
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DCHECK_GE(pending_high_res_tasks_, 0);
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return delayed_task;
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}
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bool PendingTaskQueue::DelayedQueue::HasTasks() {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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// TODO(robliao): The other queues don't check for IsCancelled(). Should they?
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while (!queue_.empty() && Peek().task.IsCancelled())
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Pop();
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return !queue_.empty();
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}
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void PendingTaskQueue::DelayedQueue::Clear() {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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while (!queue_.empty())
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Pop();
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}
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size_t PendingTaskQueue::DelayedQueue::Size() const {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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return queue_.size();
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}
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PendingTaskQueue::DeferredQueue::DeferredQueue() {
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// The constructing sequence is not necessarily the running sequence, e.g. in
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// the case of a MessageLoop created unbound.
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DETACH_FROM_SEQUENCE(sequence_checker_);
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}
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PendingTaskQueue::DeferredQueue::~DeferredQueue() = default;
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void PendingTaskQueue::DeferredQueue::Push(PendingTask pending_task) {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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queue_.push(std::move(pending_task));
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}
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const PendingTask& PendingTaskQueue::DeferredQueue::Peek() {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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DCHECK(!queue_.empty());
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return queue_.front();
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}
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PendingTask PendingTaskQueue::DeferredQueue::Pop() {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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DCHECK(!queue_.empty());
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PendingTask deferred_task = std::move(queue_.front());
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queue_.pop();
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return deferred_task;
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}
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bool PendingTaskQueue::DeferredQueue::HasTasks() {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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return !queue_.empty();
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}
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void PendingTaskQueue::DeferredQueue::Clear() {
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DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
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while (!queue_.empty())
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Pop();
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}
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} // namespace internal
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} // namespace base
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