172 struct HciLayer::impl : public hal::HciHalCallbacks {  struct in bluetooth::hci::HciLayer
173   impl(HciLayer& module) : hal_(nullptr), module_(module) {}  in impl()  function
175   ~impl() {}  in ~impl()
177   void Start(hal::HciHal* hal) {  in Start()
200   void drop(EventPacketView) {}  in drop()
202   void dequeue_and_send_acl() {  in dequeue_and_send_acl()
207   void Stop() {  in Stop()
223   void send_acl(std::unique_ptr<hci::BasePacketBuilder> packet) {  in send_acl()
230   void send_sco(std::unique_ptr<hci::BasePacketBuilder> packet) {  in send_sco()
237   void command_status_callback(EventPacketView event) {  in command_status_callback()
261   void command_complete_callback(EventPacketView event) {  in command_complete_callback()
285   void le_meta_event_callback(EventPacketView event) {  in le_meta_event_callback()
295   void hciEventReceived(hal::HciPacket event_bytes) override {  in hciEventReceived()
303   void hci_event_received_handler(EventPacketView event) {  in hci_event_received_handler()
311   void aclDataReceived(hal::HciPacket data_bytes) override {  in aclDataReceived()
318   void scoDataReceived(hal::HciPacket data_bytes) override {  in scoDataReceived()
323   void EnqueueCommand(std::unique_ptr<CommandPacketBuilder> command,  in EnqueueCommand()
330 …and(std::unique_ptr<CommandPacketBuilder> command, OnceCallback<void(CommandStatusView)> on_status,  in EnqueueCommand()
336   void handle_enqueue_command_with_complete(std::unique_ptr<CommandPacketBuilder> command,  in handle_enqueue_command_with_complete()
343   void handle_enqueue_command_with_status(std::unique_ptr<CommandPacketBuilder> command,  in handle_enqueue_command_with_status()
350   void send_next_command() {  in send_next_command()
372   BidiQueueEnd<AclPacketBuilder, AclPacketView>* GetAclQueueEnd() {  in GetAclQueueEnd()
376 …andler(EventCode event_code, Callback<void(EventPacketView)> event_handler, os::Handler* handler) {  in RegisterEventHandler()
381 … handle_register_event_handler(EventCode event_code, Callback<void(EventPacketView)> event_handler,  in handle_register_event_handler()
389   void UnregisterEventHandler(EventCode event_code) {  in UnregisterEventHandler()
394   void handle_unregister_event_handler(EventCode event_code) {  in handle_unregister_event_handler()
398 …d RegisterLeEventHandler(SubeventCode subevent_code, Callback<void(LeMetaEventView)> event_handler,  in RegisterLeEventHandler()
404 …ster_le_event_handler(SubeventCode subevent_code, Callback<void(LeMetaEventView)> subevent_handler,  in handle_register_le_event_handler()
413   void UnregisterLeEventHandler(SubeventCode subevent_code) {  in UnregisterLeEventHandler()
418   void handle_unregister_le_event_handler(SubeventCode subevent_code) {  in handle_unregister_le_event_handler()
423   hal::HciHal* hal_;
426   HciLayer& module_;
429   SecurityInterfaceImpl security_interface{module_};
430   LeSecurityInterfaceImpl le_security_interface{module_};
431   LeAdvertisingInterfaceImpl le_advertising_interface{module_};
432   LeScanningInterfaceImpl le_scanning_interface{module_};
435   std::list<CommandQueueEntry> command_queue_;
437   std::map<EventCode, EventHandler> event_handlers_;
438   std::map<SubeventCode, SubeventHandler> subevent_handlers_;
439   OpCode waiting_command_{OpCode::NONE};
440   uint8_t command_credits_{1};  // Send reset first
441   Alarm* hci_timeout_alarm_{nullptr};
444   BidiQueue<AclPacketView, AclPacketBuilder> acl_queue_{3 /* TODO: Set queue depth */};
445   os::EnqueueBuffer<AclPacketView> incoming_acl_packet_buffer_{acl_queue_.GetDownEnd()};