mirror of
https://github.com/klzgrad/naiveproxy.git
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126 lines
3.6 KiB
C++
126 lines
3.6 KiB
C++
// Copyright (c) 2012 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 "net/quic/test_tools/simulator/queue.h"
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#include "net/quic/platform/api/quic_logging.h"
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#include "net/quic/test_tools/simulator/simulator.h"
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using std::string;
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namespace net {
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namespace simulator {
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Queue::ListenerInterface::~ListenerInterface() {}
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Queue::Queue(Simulator* simulator, string name, QuicByteCount capacity)
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: Actor(simulator, name),
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capacity_(capacity),
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bytes_queued_(0),
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aggregation_threshold_(0),
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aggregation_timeout_(QuicTime::Delta::Infinite()),
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current_bundle_(0),
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current_bundle_bytes_(0),
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listener_(nullptr) {
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aggregation_timeout_alarm_.reset(simulator_->GetAlarmFactory()->CreateAlarm(
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new AggregationAlarmDelegate(this)));
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}
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Queue::~Queue() {}
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void Queue::set_tx_port(ConstrainedPortInterface* port) {
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tx_port_ = port;
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}
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void Queue::AcceptPacket(std::unique_ptr<Packet> packet) {
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if (packet->size + bytes_queued_ > capacity_) {
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QUIC_DVLOG(1) << "Queue [" << name() << "] has received a packet from ["
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<< packet->source << "] to [" << packet->destination
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<< "] which is over capacity. Dropping it.";
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QUIC_DVLOG(1) << "Queue size: " << bytes_queued_ << " out of " << capacity_
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<< ". Packet size: " << packet->size;
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return;
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}
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bytes_queued_ += packet->size;
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queue_.emplace(std::move(packet), current_bundle_);
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if (IsAggregationEnabled()) {
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current_bundle_bytes_ += queue_.front().packet->size;
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if (!aggregation_timeout_alarm_->IsSet()) {
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aggregation_timeout_alarm_->Set(clock_->Now() + aggregation_timeout_);
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}
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if (current_bundle_bytes_ >= aggregation_threshold_) {
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NextBundle();
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}
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}
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ScheduleNextPacketDequeue();
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}
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void Queue::Act() {
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DCHECK(!queue_.empty());
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if (tx_port_->TimeUntilAvailable().IsZero()) {
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DCHECK(bytes_queued_ >= queue_.front().packet->size);
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bytes_queued_ -= queue_.front().packet->size;
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tx_port_->AcceptPacket(std::move(queue_.front().packet));
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queue_.pop();
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if (listener_ != nullptr) {
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listener_->OnPacketDequeued();
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}
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}
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ScheduleNextPacketDequeue();
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}
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void Queue::EnableAggregation(QuicByteCount aggregation_threshold,
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QuicTime::Delta aggregation_timeout) {
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DCHECK_EQ(bytes_queued_, 0u);
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DCHECK_GT(aggregation_threshold, 0u);
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DCHECK(!aggregation_timeout.IsZero());
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DCHECK(!aggregation_timeout.IsInfinite());
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aggregation_threshold_ = aggregation_threshold;
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aggregation_timeout_ = aggregation_timeout;
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}
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Queue::AggregationAlarmDelegate::AggregationAlarmDelegate(Queue* queue)
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: queue_(queue) {}
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void Queue::AggregationAlarmDelegate::OnAlarm() {
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queue_->NextBundle();
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queue_->ScheduleNextPacketDequeue();
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}
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Queue::EnqueuedPacket::EnqueuedPacket(std::unique_ptr<Packet> packet,
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AggregationBundleNumber bundle)
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: packet(std::move(packet)), bundle(bundle) {}
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Queue::EnqueuedPacket::EnqueuedPacket(EnqueuedPacket&& other) = default;
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Queue::EnqueuedPacket::~EnqueuedPacket() = default;
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void Queue::NextBundle() {
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current_bundle_++;
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current_bundle_bytes_ = 0;
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aggregation_timeout_alarm_->Cancel();
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}
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void Queue::ScheduleNextPacketDequeue() {
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if (queue_.empty()) {
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DCHECK_EQ(bytes_queued_, 0u);
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return;
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}
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if (IsAggregationEnabled() && queue_.front().bundle == current_bundle_) {
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return;
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}
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Schedule(clock_->Now() + tx_port_->TimeUntilAvailable());
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}
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} // namespace simulator
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} // namespace net
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