namespace WII_IPC_HLE_Interface
{

typedef std::map<u32, std::shared_ptr<IWII_IPC_HLE_Device>> TDeviceMap;
static TDeviceMap g_DeviceMap;

// STATE_TO_SAVE
#define IPC_MAX_FDS 0x18
#define ES_MAX_COUNT 2
static std::shared_ptr<IWII_IPC_HLE_Device> g_FdMap[IPC_MAX_FDS];
static bool es_inuse[ES_MAX_COUNT];
static std::shared_ptr<IWII_IPC_HLE_Device> es_handles[ES_MAX_COUNT];


typedef std::deque<u32> ipc_msg_queue;
static ipc_msg_queue request_queue; // ppc -> arm
static ipc_msg_queue reply_queue;   // arm -> ppc
static ipc_msg_queue ack_queue;   // arm -> ppc

static int event_enqueue;

static u64 last_reply_time;

static const u64 ENQUEUE_REQUEST_FLAG = 0x100000000ULL;
static const u64 ENQUEUE_ACKNOWLEDGEMENT_FLAG = 0x200000000ULL;
static void EnqueueEvent(u64 userdata, int cycles_late = 0)
{
	if (userdata & ENQUEUE_ACKNOWLEDGEMENT_FLAG)
	{
		ack_queue.push_back((u32)userdata);
	}
	else if (userdata & ENQUEUE_REQUEST_FLAG)
	{
		request_queue.push_back((u32)userdata);
	}
	else
	{
		reply_queue.push_back((u32)userdata);
	}
	Update();
}

static u32 num_devices;

template <typename T>
std::shared_ptr<T> AddDevice(const char* deviceName)
{
	auto device = std::make_shared<T>(num_devices, deviceName);
	g_DeviceMap[num_devices] = device;
	num_devices++;
	return device;
}

void Init()
{
	bool Wee_speeak_support = SConfig::GetInstance().bWiiSpeakSupport;
	_dbg_assert_msg_(WII_IPC_HLE, g_DeviceMap.empty(), "DeviceMap isn't empty on init");
	CWII_IPC_HLE_Device_es::m_ContentFile = "";

	num_devices = 0;

	// Build hardware devices
	if (Wee_speeak_support)
	{
		AddDevice<CWII_IPC_HLE_Device_usb_oh0>("/dev/usb/oh0");
		AddDevice<CWII_IPC_HLE_Device_usb_ven>("/dev/usb/ven");
		AddDevice<CWII_IPC_HLE_Device_usb_oh0_57e_308>("/dev/usb/oh0/57e/308");
		AddDevice<CWII_IPC_HLE_Device_usb_oh0_46d_a03>("/dev/usb/oh0/46d/a03");
	}
	AddDevice<CWII_IPC_HLE_Device_usb_oh1_57e_305>("/dev/usb/oh1/57e/305");
	AddDevice<CWII_IPC_HLE_Device_stm_immediate>("/dev/stm/immediate");
	AddDevice<CWII_IPC_HLE_Device_stm_eventhook>("/dev/stm/eventhook");
	AddDevice<CWII_IPC_HLE_Device_fs>("/dev/fs");

	// IOS allows two ES devices at a time
	for (u32 j=0; j<ES_MAX_COUNT; j++)
	{
		es_handles[j] = AddDevice<CWII_IPC_HLE_Device_es>("/dev/es");
		es_inuse[j] = false;
	}

	AddDevice<CWII_IPC_HLE_Device_di>("/dev/di");
	AddDevice<CWII_IPC_HLE_Device_net_kd_request>("/dev/net/kd/request");
	AddDevice<CWII_IPC_HLE_Device_net_kd_time>("/dev/net/kd/time");
	AddDevice<CWII_IPC_HLE_Device_net_ncd_manage>("/dev/net/ncd/manage");
	AddDevice<CWII_IPC_HLE_Device_net_wd_command>("/dev/net/wd/command");
	AddDevice<CWII_IPC_HLE_Device_net_ip_top>("/dev/net/ip/top");
	AddDevice<CWII_IPC_HLE_Device_net_ssl>("/dev/net/ssl");
	AddDevice<CWII_IPC_HLE_Device_usb_kbd>("/dev/usb/kbd");
	AddDevice<CWII_IPC_HLE_Device_sdio_slot0>("/dev/sdio/slot0");
	AddDevice<CWII_IPC_HLE_Device_stub>("/dev/sdio/slot1");
	#if defined(__LIBUSB__) || defined(_WIN32)
		AddDevice<CWII_IPC_HLE_Device_hid>("/dev/usb/hid");
	#else
		AddDevice<CWII_IPC_HLE_Device_stub>("/dev/usb/hid");
	#endif
	AddDevice<CWII_IPC_HLE_Device_stub>("/dev/usb/oh1");
	AddDevice<IWII_IPC_HLE_Device>("_Unimplemented_Device_");

	event_enqueue = CoreTiming::RegisterEvent("IPCEvent", EnqueueEvent);
//.........这里部分代码省略.........

static void EnqueueEventCallback(u64 userdata, int)
{
	if (userdata & ENQUEUE_ACKNOWLEDGEMENT_FLAG)
	{
		ack_queue.push_back((u32)userdata);
	}
	else if (userdata & ENQUEUE_REQUEST_FLAG)
	{
		request_queue.push_back((u32)userdata);
	}
	else
	{
		reply_queue.push_back((u32)userdata);
	}
	Update();
}

void Reset(bool _bHard)
{
	CoreTiming::RemoveAllEvents(event_enqueue);

	for (IWII_IPC_HLE_Device*& dev : g_FdMap)
	{
		if (dev != nullptr && !dev->IsHardware())
		{
			// close all files and delete their resources
			dev->Close(0, true);
			delete dev;
		}

		dev = nullptr;
	}

	for (bool& in_use : es_inuse)
	{
		in_use = false;
	}

	for (const auto& entry : g_DeviceMap)
	{
		if (entry.second)
		{
			// Force close
			entry.second->Close(0, true);

			// Hardware should not be deleted unless it is a hard reset
			if (_bHard)
				delete entry.second;
		}
	}

	if (_bHard)
	{
		g_DeviceMap.erase(g_DeviceMap.begin(), g_DeviceMap.end());
	}
	request_queue.clear();
	reply_queue.clear();

	last_reply_time = 0;
}

void Reset(bool _bHard)
{
	CoreTiming::RemoveAllEvents(event_enqueue);

	for (auto& dev : g_FdMap)
	{
		if (dev && !dev->IsHardware())
		{
			// close all files and delete their resources
			dev->Close(0, true);
		}

		dev.reset();
	}

	for (bool& in_use : es_inuse)
	{
		in_use = false;
	}

	for (const auto& entry : g_DeviceMap)
	{
		if (entry.second)
		{
			// Force close
			entry.second->Close(0, true);
		}
	}

	if (_bHard)
	{
		g_DeviceMap.clear();
	}
	request_queue.clear();
	reply_queue.clear();

	last_reply_time = 0;
}

// This is called every IPC_HLE_PERIOD from SystemTimers.cpp
// Takes care of routing ipc <-> ipc HLE
void Update()
{
	if (!WII_IPCInterface::IsReady())
		return;

	if (request_queue.size())
	{
		WII_IPCInterface::GenerateAck(request_queue.front());
		INFO_LOG(WII_IPC_HLE, "||-- Acknowledge IPC Request @ 0x%08x", request_queue.front());
		u32 command = request_queue.front();
		request_queue.pop_front();
		ExecuteCommand(command);
		return;
	}

	if (reply_queue.size())
	{
		WII_IPCInterface::GenerateReply(reply_queue.front());
		INFO_LOG(WII_IPC_HLE, "<<-- Reply to IPC Request @ 0x%08x", reply_queue.front());
		reply_queue.pop_front();
		return;
	}

	if (ack_queue.size())
	{
		WII_IPCInterface::GenerateAck(ack_queue.front());
		WARN_LOG(WII_IPC_HLE, "<<-- Double-ack to IPC Request @ 0x%08x", ack_queue.front());
		ack_queue.pop_front();
		return;
	}
}