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/*
* 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.
*/
#pragma once
#include <string>
#include <unordered_map>
#include "common/bidi_queue.h"
#include "common/bind.h"
#include "l2cap/cid.h"
#include "l2cap/internal/scheduler.h"
#include "os/handler.h"
#include "os/queue.h"
#include "packet/base_packet_builder.h"
#include "packet/packet_view.h"
namespace bluetooth {
namespace l2cap {
namespace internal {
class Fifo : public Scheduler {
public:
Fifo(LowerQueueUpEnd* link_queue_up_end, os::Handler* handler)
: link_queue_up_end_(link_queue_up_end), handler_(handler) {
ASSERT(link_queue_up_end_ != nullptr && handler_ != nullptr);
link_queue_up_end_->RegisterDequeue(handler_,
common::Bind(&Fifo::link_queue_dequeue_callback, common::Unretained(this)));
}
~Fifo() override;
void AttachChannel(Cid cid, UpperQueueDownEnd* channel_down_end) override;
void DetachChannel(Cid cid) override;
LowerQueueUpEnd* GetLowerQueueUpEnd() const override {
return link_queue_up_end_;
}
private:
LowerQueueUpEnd* link_queue_up_end_;
os::Handler* handler_;
struct ChannelQueueEndAndBuffer {
ChannelQueueEndAndBuffer(os::Handler* handler, UpperQueueDownEnd* queue_end, Fifo* scheduler, Cid channel_id)
: handler_(handler), queue_end_(queue_end), enqueue_buffer_(queue_end), scheduler_(scheduler),
channel_id_(channel_id) {
try_register_dequeue();
}
os::Handler* handler_;
UpperQueueDownEnd* queue_end_;
os::EnqueueBuffer<UpperEnqueue> enqueue_buffer_;
constexpr static int kBufferSize = 1;
std::queue<std::unique_ptr<UpperDequeue>> dequeue_buffer_;
Fifo* scheduler_;
Cid channel_id_;
bool is_dequeue_registered_ = false;
void try_register_dequeue();
void dequeue_callback();
~ChannelQueueEndAndBuffer();
};
std::unordered_map<Cid, ChannelQueueEndAndBuffer> channel_queue_end_map_;
std::queue<Cid> next_to_dequeue_;
void link_queue_dequeue_callback();
bool link_queue_enqueue_registered_ = false;
void try_register_link_queue_enqueue();
std::unique_ptr<LowerEnqueue> link_queue_enqueue_callback();
};
} // namespace internal
} // namespace l2cap
} // namespace bluetooth
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