74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/*
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* Copyright 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <cstdint>
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#include "common/bidi_queue.h"
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#include "l2cap/cid.h"
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#include "l2cap/classic/dynamic_channel_configuration_option.h"
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#include "l2cap/internal/channel_impl.h"
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#include "l2cap/internal/data_controller.h"
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#include "l2cap/internal/sender.h"
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#include "l2cap/l2cap_packets.h"
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#include "packet/base_packet_builder.h"
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#include "packet/packet_view.h"
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namespace bluetooth {
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namespace l2cap {
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namespace internal {
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/**
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* Handle the scheduling of packets through the l2cap stack.
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* For each attached channel, dequeue its outgoing packets and enqueue it to the given LinkQueueUpEnd, according to some
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* policy (cid).
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*
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* Note: If a channel cannot dequeue from ChannelQueueDownEnd so that the buffer for incoming packet is full, further
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* incoming packets will be dropped.
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*/
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class Scheduler {
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public:
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using UpperEnqueue = packet::PacketView<packet::kLittleEndian>;
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using UpperDequeue = packet::BasePacketBuilder;
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using UpperQueueDownEnd = common::BidiQueueEnd<UpperEnqueue, UpperDequeue>;
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using LowerEnqueue = UpperDequeue;
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using LowerDequeue = UpperEnqueue;
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using LowerQueueUpEnd = common::BidiQueueEnd<LowerEnqueue, LowerDequeue>;
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/**
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* Callback from the sender to indicate that the scheduler could dequeue number_packets from it
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*/
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virtual void OnPacketsReady(Cid cid, int number_packets) {}
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/**
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* Let the scheduler send the specified cid first.
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* Used by A2dp software encoding.
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*/
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virtual void SetChannelTxPriority(Cid cid, bool high_priority) {}
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/**
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* Called by data controller to indicate that a channel is closed and packets should be dropped
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*/
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virtual void RemoveChannel(Cid cid) {}
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virtual ~Scheduler() = default;
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};
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} // namespace internal
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} // namespace l2cap
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} // namespace bluetooth
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