| /* |
| * Copyright 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "l2cap/internal/scheduler_fifo.h" |
| |
| #include "l2cap/classic/internal/dynamic_channel_impl.h" |
| #include "l2cap/internal/data_pipeline_manager.h" |
| #include "l2cap/l2cap_packets.h" |
| #include "os/log.h" |
| |
| namespace bluetooth { |
| namespace l2cap { |
| namespace internal { |
| |
| Fifo::Fifo(DataPipelineManager* data_pipeline_manager, LowerQueueUpEnd* link_queue_up_end, os::Handler* handler) |
| : data_pipeline_manager_(data_pipeline_manager), link_queue_up_end_(link_queue_up_end), handler_(handler) { |
| ASSERT(link_queue_up_end_ != nullptr && handler_ != nullptr); |
| } |
| |
| Fifo::~Fifo() { |
| if (link_queue_enqueue_registered_) { |
| link_queue_up_end_->UnregisterEnqueue(); |
| } |
| } |
| |
| void Fifo::OnPacketsReady(Cid cid, int number_packets) { |
| next_to_dequeue_and_num_packets.push(std::make_pair(cid, number_packets)); |
| try_register_link_queue_enqueue(); |
| } |
| |
| std::unique_ptr<Fifo::UpperDequeue> Fifo::link_queue_enqueue_callback() { |
| ASSERT(!next_to_dequeue_and_num_packets.empty()); |
| auto& channel_id_and_number_packets = next_to_dequeue_and_num_packets.front(); |
| auto channel_id = channel_id_and_number_packets.first; |
| channel_id_and_number_packets.second--; |
| if (channel_id_and_number_packets.second == 0) { |
| next_to_dequeue_and_num_packets.pop(); |
| } |
| auto packet = data_pipeline_manager_->GetDataController(channel_id)->GetNextPacket(); |
| |
| data_pipeline_manager_->OnPacketSent(channel_id); |
| if (next_to_dequeue_and_num_packets.empty()) { |
| link_queue_up_end_->UnregisterEnqueue(); |
| link_queue_enqueue_registered_ = false; |
| } |
| return packet; |
| } |
| |
| void Fifo::try_register_link_queue_enqueue() { |
| if (link_queue_enqueue_registered_) { |
| return; |
| } |
| link_queue_up_end_->RegisterEnqueue(handler_, |
| common::Bind(&Fifo::link_queue_enqueue_callback, common::Unretained(this))); |
| link_queue_enqueue_registered_ = true; |
| } |
| |
| } // namespace internal |
| } // namespace l2cap |
| } // namespace bluetooth |