162 Source/Core/InputCommon/ControllerInterface/DualShockUDPClient/DualShockUDPClient.cpp
View file
@@ -130,7 +130,7 @@ class Device final : public Core::Device
public:
void UpdateInput() override;

Device(std::string name, int index, std::string server_address, u16 server_port);
Device(std::string name, int index, std::string server_address, u16 server_port, u32 client_uid);

std::string GetName() const final override;
std::string GetSource() const final override;
@@ -150,13 +150,15 @@ class Device final : public Core::Device
bool m_prev_touch_valid = false;
int m_touch_x = 0;
int m_touch_y = 0;
std::string m_server_address;
u16 m_server_port;
const std::string m_server_address;
const u16 m_server_port;

s16 m_touch_x_min;
s16 m_touch_y_min;
s16 m_touch_x_max;
s16 m_touch_y_max;

const u32 m_client_uid;
};

using MathUtil::GRAVITY_ACCELERATION;
@@ -196,13 +198,34 @@ struct Server
SteadyClock::time_point m_disconnect_time = SteadyClock::now();
};

static bool s_has_init;
static bool s_servers_enabled;
static std::vector<Server> s_servers;
static u32 s_client_uid;
static SteadyClock::time_point s_next_listports_time;
static std::thread s_hotplug_thread;
static Common::Flag s_hotplug_thread_running;
class InputBackend final : public ciface::InputBackend
{
public:
InputBackend(ControllerInterface* controller_interface);
~InputBackend();
void PopulateDevices() override;

private:
void ConfigChanged();
void Restart();

void HotplugThreadFunc();
void StartHotplugThread();
void StopHotplugThread();

bool m_servers_enabled;
std::vector<Server> m_servers;
u32 m_client_uid;
SteadyClock::time_point m_next_listports_time;
std::thread m_hotplug_thread;
Common::Flag m_hotplug_thread_running;
std::size_t m_config_change_callback_id;
};

std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface)
{
return std::make_unique<InputBackend>(controller_interface);
}

static bool IsSameController(const Proto::MessageType::PortInfo& a,
const Proto::MessageType::PortInfo& b)
@@ -212,29 +235,29 @@ static bool IsSameController(const Proto::MessageType::PortInfo& a,
std::tie(b.pad_id, b.pad_state, b.model, b.connection_type, b.pad_mac_address);
}

static void HotplugThreadFunc()
void InputBackend::HotplugThreadFunc()
{
Common::SetCurrentThreadName("DualShockUDPClient Hotplug Thread");
INFO_LOG_FMT(CONTROLLERINTERFACE, "DualShockUDPClient hotplug thread started");
Common::ScopeGuard thread_stop_guard{
[] { INFO_LOG_FMT(CONTROLLERINTERFACE, "DualShockUDPClient hotplug thread stopped"); }};

std::vector<bool> timed_out_servers(s_servers.size(), false);
std::vector<bool> timed_out_servers(m_servers.size(), false);

while (s_hotplug_thread_running.IsSet())
while (m_hotplug_thread_running.IsSet())
{
using namespace std::chrono;
using namespace std::chrono_literals;

const auto now = SteadyClock::now();
if (now >= s_next_listports_time)
if (now >= m_next_listports_time)
{
s_next_listports_time = now + SERVER_LISTPORTS_INTERVAL;
m_next_listports_time = now + SERVER_LISTPORTS_INTERVAL;

for (size_t i = 0; i < s_servers.size(); ++i)
for (size_t i = 0; i < m_servers.size(); ++i)
{
auto& server = s_servers[i];
Proto::Message<Proto::MessageType::ListPorts> msg(s_client_uid);
auto& server = m_servers[i];
Proto::Message<Proto::MessageType::ListPorts> msg(m_client_uid);
auto& list_ports = msg.m_message;
// We ask for x possible devices. We will receive a message for every connected device.
list_ports.pad_request_count = SERVER_ASKED_PADS;
@@ -250,12 +273,12 @@ static void HotplugThreadFunc()
}

sf::SocketSelector selector;
for (auto& server : s_servers)
for (auto& server : m_servers)
{
selector.add(server.m_socket);
}

auto timeout = duration_cast<milliseconds>(s_next_listports_time - SteadyClock::now());
auto timeout = duration_cast<milliseconds>(m_next_listports_time - SteadyClock::now());

// Receive controller port info within a time from our request.
// Run this even if we sent no new requests, to disconnect devices,
@@ -271,9 +294,9 @@ static void HotplugThreadFunc()
if (selector.wait(sf::milliseconds(current_timeout.count())))
{
// Now check all the servers because we don't know which one(s) sent a reply
for (size_t i = 0; i < s_servers.size(); ++i)
for (size_t i = 0; i < m_servers.size(); ++i)
{
auto& server = s_servers[i];
auto& server = m_servers[i];
if (!selector.isReady(server.m_socket))
{
continue;
@@ -302,20 +325,20 @@ static void HotplugThreadFunc()
{
server.m_port_info[port_info->pad_id] = *port_info;
// Just remove and re-add all the devices for simplicity
g_controller_interface.PlatformPopulateDevices([] { PopulateDevices(); });
GetControllerInterface().PlatformPopulateDevices([this] { PopulateDevices(); });
}
}
}
}
if (!s_hotplug_thread_running.IsSet()) // Avoid hanging the thread for too long
if (!m_hotplug_thread_running.IsSet()) // Avoid hanging the thread for too long
return;
} while (timeout > 0ms);

// If we have failed to receive any information from the server (or even send it),
// disconnect all devices from it (after enough time has elapsed, to avoid false positives).
for (size_t i = 0; i < s_servers.size(); ++i)
for (size_t i = 0; i < m_servers.size(); ++i)
{
auto& server = s_servers[i];
auto& server = m_servers[i];
if (timed_out_servers[i] && SteadyClock::now() >= server.m_disconnect_time)
{
bool any_connected = false;
@@ -328,49 +351,49 @@ static void HotplugThreadFunc()
}
// We can't only remove devices added by this server as we wouldn't know which they are
if (any_connected)
g_controller_interface.PlatformPopulateDevices([] { PopulateDevices(); });
GetControllerInterface().PlatformPopulateDevices([this] { PopulateDevices(); });
}
}
}
}

static void StartHotplugThread()
void InputBackend::StartHotplugThread()
{
// Mark the thread as running.
if (!s_hotplug_thread_running.TestAndSet())
if (!m_hotplug_thread_running.TestAndSet())
{
// It was already running.
return;
}

s_hotplug_thread = std::thread(HotplugThreadFunc);
m_hotplug_thread = std::thread(&InputBackend::HotplugThreadFunc, this);
}

static void StopHotplugThread()
void InputBackend::StopHotplugThread()
{
// Tell the hotplug thread to stop.
if (!s_hotplug_thread_running.TestAndClear())
if (!m_hotplug_thread_running.TestAndClear())
{
// It wasn't running, we're done.
return;
}

s_hotplug_thread.join();
m_hotplug_thread.join();

for (auto& server : s_servers)
for (auto& server : m_servers)
{
server.m_socket.unbind(); // interrupt blocking socket
}
}

// Also just start
static void Restart()
void InputBackend::Restart()
{
INFO_LOG_FMT(CONTROLLERINTERFACE, "DualShockUDPClient Restart");

StopHotplugThread();

for (auto& server : s_servers)
for (auto& server : m_servers)
{
for (size_t port_index = 0; port_index < server.m_port_info.size(); port_index++)
{
@@ -380,37 +403,34 @@ static void Restart()
}

// Only removes devices as servers have been cleaned
g_controller_interface.PlatformPopulateDevices([] { PopulateDevices(); });
GetControllerInterface().PlatformPopulateDevices([this] { PopulateDevices(); });

s_client_uid = Common::Random::GenerateValue<u32>();
s_next_listports_time = SteadyClock::now();
m_client_uid = Common::Random::GenerateValue<u32>();
m_next_listports_time = SteadyClock::now();

if (s_servers_enabled && !s_servers.empty())
if (m_servers_enabled && !m_servers.empty())
StartHotplugThread();
}

static void ConfigChanged()
void InputBackend::ConfigChanged()
{
if (!s_has_init)
return;

const bool servers_enabled = Config::Get(Settings::SERVERS_ENABLED);
const std::string servers_setting = Config::Get(Settings::SERVERS);

std::string new_servers_setting;
for (const auto& server : s_servers)
for (const auto& server : m_servers)
{
new_servers_setting +=
fmt::format("{}:{}:{};", server.m_description, server.m_address, server.m_port);
}

if (servers_enabled != s_servers_enabled || servers_setting != new_servers_setting)
if (servers_enabled != m_servers_enabled || servers_setting != new_servers_setting)
{
// Stop the thread before writing to s_servers
// Stop the thread before writing to m_servers
StopHotplugThread();

s_servers_enabled = servers_enabled;
s_servers.clear();
m_servers_enabled = servers_enabled;
m_servers.clear();

const auto server_details = SplitString(servers_setting, ';');
for (const auto& server_detail : server_details)
@@ -428,17 +448,15 @@ static void ConfigChanged()
}
u16 server_port = static_cast<u16>(port);

s_servers.emplace_back(description, server_address, server_port);
m_servers.emplace_back(description, server_address, server_port);
}
Restart();
}
}

void Init()
InputBackend::InputBackend(ControllerInterface* controller_interface)
: ciface::InputBackend(controller_interface)
{
// Does not support multiple init calls
s_has_init = true;

// The following is added for backwards compatibility
const auto server_address_setting = Config::Get(Settings::SERVER_ADDRESS);
const auto server_port_setting = Config::Get(Settings::SERVER_PORT);
@@ -454,54 +472,54 @@ void Init()
Config::SetBase(Settings::SERVER_PORT, 0);
}

// It would be much better to unbind from this callback on DeInit but it's not possible as of now
Config::AddConfigChangedCallback(ConfigChanged);
ConfigChanged(); // Call it immediately to load settings
m_config_change_callback_id =
Config::AddConfigChangedCallback(std::bind(&InputBackend::ConfigChanged, this));
// Call it immediately to load settings
ConfigChanged();
}

// This can be called by the host thread as well as the hotplug thread, concurrently.
// So use PlatformPopulateDevices().
// s_servers is already safe because it can only be modified when the DSU thread is not running,
// m_servers is already safe because it can only be modified when the DSU thread is not running,
// from the main thread
void PopulateDevices()
void InputBackend::PopulateDevices()
{
INFO_LOG_FMT(CONTROLLERINTERFACE, "DualShockUDPClient PopulateDevices");

// s_servers has already been updated so we can't use it to know which devices we removed,
// m_servers has already been updated so we can't use it to know which devices we removed,
// also it's good to remove all of them before adding new ones so that their id will be set
// correctly if they have the same name
g_controller_interface.RemoveDevice(
GetControllerInterface().RemoveDevice(
[](const auto* dev) { return dev->GetSource() == DUALSHOCKUDP_SOURCE_NAME; });

// Users might have created more than one server on the same IP/Port.
// Devices might end up being duplicated (if the server responds two all requests)
// but they won't conflict.
for (const auto& server : s_servers)
for (const auto& server : m_servers)
{
for (size_t port_index = 0; port_index < server.m_port_info.size(); port_index++)
{
const Proto::MessageType::PortInfo& port_info = server.m_port_info[port_index];
if (port_info.pad_state != Proto::DsState::Connected)
continue;

g_controller_interface.AddDevice(std::make_shared<Device>(
server.m_description, static_cast<int>(port_index), server.m_address, server.m_port));
GetControllerInterface().AddDevice(
std::make_shared<Device>(server.m_description, static_cast<int>(port_index),
server.m_address, server.m_port, m_client_uid));
}
}
}

void DeInit()
InputBackend::~InputBackend()
{
Config::RemoveConfigChangedCallback(m_config_change_callback_id);
StopHotplugThread();

s_has_init = false;
s_servers_enabled = false;
s_servers.clear();
}

Device::Device(std::string name, int index, std::string server_address, u16 server_port)
Device::Device(std::string name, int index, std::string server_address, u16 server_port,
u32 client_uid)
: m_name{std::move(name)}, m_index{index}, m_server_address{std::move(server_address)},
m_server_port{server_port}
m_server_port{server_port}, m_client_uid(client_uid)
{
m_socket.setBlocking(false);

@@ -604,7 +622,7 @@ void Device::UpdateInput()
{
m_next_reregister = now + SERVER_REREGISTER_INTERVAL;

Proto::Message<Proto::MessageType::PadDataRequest> msg(s_client_uid);
Proto::Message<Proto::MessageType::PadDataRequest> msg(m_client_uid);
auto& data_req = msg.m_message;
data_req.register_flags = Proto::RegisterFlags::PadID;
data_req.pad_id_to_register = m_index;
6 Source/Core/InputCommon/ControllerInterface/DualShockUDPClient/DualShockUDPClient.h
View file
@@ -4,6 +4,7 @@
#pragma once

#include "Common/Config/Config.h"
#include "InputCommon/ControllerInterface/InputBackend.h"

namespace ciface::DualShockUDPClient
{
@@ -20,7 +21,6 @@ extern const Config::Info<std::string> SERVERS;
extern const Config::Info<bool> SERVERS_ENABLED;
} // namespace Settings

void Init();
void PopulateDevices();
void DeInit();
std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);

} // namespace ciface::DualShockUDPClient
24 Source/Core/InputCommon/ControllerInterface/InputBackend.cpp
View file
@@ -0,0 +1,24 @@
// Copyright 2022 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#include "InputCommon/ControllerInterface/InputBackend.h"

namespace ciface
{
InputBackend::InputBackend(ControllerInterface* controller_interface)
: m_controller_interface(*controller_interface)
{
}

InputBackend::~InputBackend() = default;

void InputBackend::UpdateInput()
{
}

ControllerInterface& InputBackend::GetControllerInterface()
{
return m_controller_interface;
}

} // namespace ciface
26 Source/Core/InputCommon/ControllerInterface/InputBackend.h
View file
@@ -0,0 +1,26 @@
// Copyright 2022 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later

#pragma once

class ControllerInterface;

namespace ciface
{
class InputBackend
{
public:
InputBackend(ControllerInterface* controller_interface);

virtual ~InputBackend();

virtual void PopulateDevices() = 0;
virtual void UpdateInput();

ControllerInterface& GetControllerInterface();

private:
ControllerInterface& m_controller_interface;
};

} // namespace ciface
74 Source/Core/InputCommon/ControllerInterface/SDL/SDL.cpp
View file
@@ -29,46 +29,68 @@ static std::string GetJoystickName(int index)
#endif
}

static void OpenAndAddDevice(int index)
class InputBackend final : public ciface::InputBackend
{
public:
InputBackend(ControllerInterface* controller_interface);
~InputBackend();
void PopulateDevices() override;
void UpdateInput() override;

private:
void OpenAndAddDevice(int index);

#if SDL_VERSION_ATLEAST(2, 0, 0)
bool HandleEventAndContinue(const SDL_Event& e);

Common::Event m_init_event;
Uint32 m_stop_event_type;
Uint32 m_populate_event_type;
std::thread m_hotplug_thread;
#endif
};

std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface)
{
return std::make_unique<InputBackend>(controller_interface);
}

void InputBackend::OpenAndAddDevice(int index)
{
SDL_Joystick* const dev = SDL_JoystickOpen(index);
if (dev)
{
auto js = std::make_shared<Joystick>(dev, index);
// only add if it has some inputs/outputs
if (!js->Inputs().empty() || !js->Outputs().empty())
g_controller_interface.AddDevice(std::move(js));
GetControllerInterface().AddDevice(std::move(js));
}
}

#if SDL_VERSION_ATLEAST(2, 0, 0)
static Common::Event s_init_event;
static Uint32 s_stop_event_type;
static Uint32 s_populate_event_type;
static std::thread s_hotplug_thread;

static bool HandleEventAndContinue(const SDL_Event& e)
bool InputBackend::HandleEventAndContinue(const SDL_Event& e)
{
if (e.type == SDL_JOYDEVICEADDED)
{
OpenAndAddDevice(e.jdevice.which);
}
else if (e.type == SDL_JOYDEVICEREMOVED)
{
g_controller_interface.RemoveDevice([&e](const auto* device) {
GetControllerInterface().RemoveDevice([&e](const auto* device) {
return device->GetSource() == "SDL" &&
SDL_JoystickInstanceID(static_cast<const Joystick*>(device)->GetSDLJoystick()) ==
e.jdevice.which;
});
}
else if (e.type == s_populate_event_type)
else if (e.type == m_populate_event_type)
{
g_controller_interface.PlatformPopulateDevices([] {
GetControllerInterface().PlatformPopulateDevices([this] {
for (int i = 0; i < SDL_NumJoysticks(); ++i)
OpenAndAddDevice(i);
});
}
else if (e.type == s_stop_event_type)
else if (e.type == m_stop_event_type)
{
return false;
}
@@ -144,7 +166,8 @@ static void EnableSDLLogging()
nullptr);
}

void Init()
InputBackend::InputBackend(ControllerInterface* controller_interface)
: ciface::InputBackend(controller_interface)
{
#if !SDL_VERSION_ATLEAST(2, 0, 0)
if (SDL_Init(SDL_INIT_JOYSTICK | SDL_INIT_HAPTIC) != 0)
@@ -168,13 +191,13 @@ void Init()
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_PS4_RUMBLE, "1");
#endif

s_hotplug_thread = std::thread([] {
m_hotplug_thread = std::thread([this] {
Common::ScopeGuard quit_guard([] {
// TODO: there seems to be some sort of memory leak with SDL, quit isn't freeing everything up
SDL_Quit();
});
{
Common::ScopeGuard init_guard([] { s_init_event.Set(); });
Common::ScopeGuard init_guard([this] { m_init_event.Set(); });

if (SDL_Init(SDL_INIT_JOYSTICK | SDL_INIT_HAPTIC | SDL_INIT_GAMECONTROLLER) != 0)
{
@@ -188,8 +211,8 @@ void Init()
ERROR_LOG_FMT(CONTROLLERINTERFACE, "SDL failed to register custom events");
return;
}
s_stop_event_type = custom_events_start;
s_populate_event_type = custom_events_start + 1;
m_stop_event_type = custom_events_start;
m_populate_event_type = custom_events_start + 1;

// Drain all of the events and add the initial joysticks before returning. Otherwise, the
// individual joystick events as well as the custom populate event will be handled _after_
@@ -235,26 +258,26 @@ void Init()
}
});

s_init_event.Wait();
m_init_event.Wait();
#endif
}

void DeInit()
InputBackend::~InputBackend()
{
#if !SDL_VERSION_ATLEAST(2, 0, 0)
SDL_Quit();
#else
if (!s_hotplug_thread.joinable())
if (!m_hotplug_thread.joinable())
return;

SDL_Event stop_event{s_stop_event_type};
SDL_Event stop_event{m_stop_event_type};
SDL_PushEvent(&stop_event);

s_hotplug_thread.join();
m_hotplug_thread.join();
#endif
}

void PopulateDevices()
void InputBackend::PopulateDevices()
{
#if !SDL_VERSION_ATLEAST(2, 0, 0)
if (!SDL_WasInit(SDL_INIT_JOYSTICK))
@@ -263,10 +286,10 @@ void PopulateDevices()
for (int i = 0; i < SDL_NumJoysticks(); ++i)
OpenAndAddDevice(i);
#else
if (!s_hotplug_thread.joinable())
if (!m_hotplug_thread.joinable())
return;

SDL_Event populate_event{s_populate_event_type};
SDL_Event populate_event{m_populate_event_type};
SDL_PushEvent(&populate_event);
#endif
}
@@ -617,9 +640,8 @@ void Joystick::Motor::SetState(ControlState state)
}
#endif

void Joystick::UpdateInput()
void InputBackend::UpdateInput()
{
// TODO: Don't call this for every Joystick, only once per ControllerInterface::UpdateInput()
SDL_JoystickUpdate();
}

7 Source/Core/InputCommon/ControllerInterface/SDL/SDL.h
View file
@@ -22,12 +22,11 @@
#endif

#include "InputCommon/ControllerInterface/CoreDevice.h"
#include "InputCommon/ControllerInterface/InputBackend.h"

namespace ciface::SDL
{
void Init();
void DeInit();
void PopulateDevices();
std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);

class Joystick : public Core::Device
{
@@ -182,8 +181,6 @@ class Joystick : public Core::Device
#endif

public:
void UpdateInput() override;

Joystick(SDL_Joystick* const joystick, const int sdl_index);
~Joystick();

133 Source/Core/InputCommon/ControllerInterface/evdev/evdev.cpp
View file
@@ -25,6 +25,43 @@

namespace ciface::evdev
{
class InputBackend final : public ciface::InputBackend
{
public:
InputBackend(ControllerInterface* controller_interface);
~InputBackend();
void PopulateDevices() override;

void RemoveDevnodeObject(const std::string&);

private:
std::shared_ptr<evdevDevice>
FindDeviceWithUniqueIDAndPhysicalLocation(const char* unique_id, const char* physical_location);

void AddDeviceNode(const char* devnode);

void StartHotplugThread();
void StopHotplugThread();
void HotplugThreadFunc();

std::thread m_hotplug_thread;
Common::Flag m_hotplug_thread_running;
int m_wakeup_eventfd;

// There is no easy way to get the device name from only a dev node
// during a device removed event, since libevdev can't work on removed devices;
// sysfs is not stable, so this is probably the easiest way to get a name for a node.
// This can, and will be modified by different thread, possibly concurrently,
// as devices can be destroyed by any thread at any time. As of now it's protected
// by ControllerInterface::m_devices_population_mutex.
std::map<std::string, std::weak_ptr<evdevDevice>> m_devnode_objects;
};

std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface)
{
return std::make_unique<InputBackend>(controller_interface);
}

class Input : public Core::Device::Input
{
public:
@@ -195,25 +232,14 @@ class CursorInput final : public Axis
bool IsDetectable() const override { return false; }
};

static std::thread s_hotplug_thread;
static Common::Flag s_hotplug_thread_running;
static int s_wakeup_eventfd;

// There is no easy way to get the device name from only a dev node
// during a device removed event, since libevdev can't work on removed devices;
// sysfs is not stable, so this is probably the easiest way to get a name for a node.
// This can, and will be modified by different thread, possibly concurrently,
// as devices can be destroyed by any thread at any time. As of now it's protected
// by ControllerInterface::m_devices_population_mutex.
static std::map<std::string, std::weak_ptr<evdevDevice>> s_devnode_objects;

static std::shared_ptr<evdevDevice>
FindDeviceWithUniqueIDAndPhysicalLocation(const char* unique_id, const char* physical_location)
std::shared_ptr<evdevDevice>
InputBackend::FindDeviceWithUniqueIDAndPhysicalLocation(const char* unique_id,
const char* physical_location)
{
if (!unique_id || !physical_location)
return nullptr;

for (auto& [node, dev] : s_devnode_objects)
for (auto& [node, dev] : m_devnode_objects)
{
if (const auto device = dev.lock())
{
@@ -231,7 +257,7 @@ FindDeviceWithUniqueIDAndPhysicalLocation(const char* unique_id, const char* phy
return nullptr;
}

static void AddDeviceNode(const char* devnode)
void InputBackend::AddDeviceNode(const char* devnode)
{
// Unfortunately udev gives us no way to filter out the non event device interfaces.
// So we open it and see if it works with evdev ioctls or not.
@@ -265,30 +291,30 @@ static void AddDeviceNode(const char* devnode)
// This will also give it the correct index and invoke device change callbacks.
// Make sure to force the device removal immediately (as they are shared ptrs and
// they could be kept alive, preventing us from re-creating the device)
g_controller_interface.RemoveDevice(
GetControllerInterface().RemoveDevice(
[&evdev_device](const auto* device) {
return static_cast<const evdevDevice*>(device) == evdev_device.get();
},
true);

g_controller_interface.AddDevice(evdev_device);
GetControllerInterface().AddDevice(evdev_device);
}
else
{
evdev_device = std::make_shared<evdevDevice>();
evdev_device = std::make_shared<evdevDevice>(this);

const bool was_interesting = evdev_device->AddNode(devnode, fd, dev);

if (was_interesting)
g_controller_interface.AddDevice(evdev_device);
GetControllerInterface().AddDevice(evdev_device);
}

// If the devices failed to be added to g_controller_interface, it will be added here but then
// If the devices failed to be added to ControllerInterface, it will be added here but then
// immediately removed in its destructor due to the shared ptr not having any references left
s_devnode_objects.emplace(devnode, std::move(evdev_device));
m_devnode_objects.emplace(devnode, std::move(evdev_device));
}

static void HotplugThreadFunc()
void InputBackend::HotplugThreadFunc()
{
Common::SetCurrentThreadName("evdev Hotplug Thread");
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "evdev hotplug thread started");
@@ -306,16 +332,16 @@ static void HotplugThreadFunc()
udev_monitor_enable_receiving(monitor);
const int monitor_fd = udev_monitor_get_fd(monitor);

while (s_hotplug_thread_running.IsSet())
while (m_hotplug_thread_running.IsSet())
{
fd_set fds;

FD_ZERO(&fds);
FD_SET(monitor_fd, &fds);
FD_SET(s_wakeup_eventfd, &fds);
FD_SET(m_wakeup_eventfd, &fds);

const int ret =
select(std::max(monitor_fd, s_wakeup_eventfd) + 1, &fds, nullptr, nullptr, nullptr);
select(std::max(monitor_fd, m_wakeup_eventfd) + 1, &fds, nullptr, nullptr, nullptr);
if (ret < 1 || !FD_ISSET(monitor_fd, &fds))
continue;

@@ -327,76 +353,78 @@ static void HotplugThreadFunc()
if (!devnode)
continue;

// Use g_controller_interface.PlatformPopulateDevices() to protect access around
// s_devnode_objects. Note that even if we get these events at the same time as a
// Use GetControllerInterface().PlatformPopulateDevices() to protect access around
// m_devnode_objects. Note that even if we get these events at the same time as a
// a PopulateDevices() request (e.g. on start up, we might get all the add events
// for connected devices), this won't ever cause duplicate devices as AddDeviceNode()
// automatically removes the old one if it already existed
if (strcmp(action, "remove") == 0)
{
g_controller_interface.PlatformPopulateDevices([&devnode] {
GetControllerInterface().PlatformPopulateDevices([&devnode, this] {
std::shared_ptr<evdevDevice> ptr;

const auto it = s_devnode_objects.find(devnode);
if (it != s_devnode_objects.end())
const auto it = m_devnode_objects.find(devnode);
if (it != m_devnode_objects.end())
ptr = it->second.lock();

// If we don't recognize this device, ptr will be null and no device will be removed.

g_controller_interface.RemoveDevice([&ptr](const auto* device) {
GetControllerInterface().RemoveDevice([&ptr](const auto* device) {
return static_cast<const evdevDevice*>(device) == ptr.get();
});
});
}
else if (strcmp(action, "add") == 0)
{
g_controller_interface.PlatformPopulateDevices([&devnode] { AddDeviceNode(devnode); });
GetControllerInterface().PlatformPopulateDevices(
[&devnode, this] { AddDeviceNode(devnode); });
}
}
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "evdev hotplug thread stopped");
}

static void StartHotplugThread()
void InputBackend::StartHotplugThread()
{
// Mark the thread as running.
if (!s_hotplug_thread_running.TestAndSet())
if (!m_hotplug_thread_running.TestAndSet())
{
// It was already running.
return;
}

s_wakeup_eventfd = eventfd(0, 0);
ASSERT_MSG(CONTROLLERINTERFACE, s_wakeup_eventfd != -1, "Couldn't create eventfd.");
s_hotplug_thread = std::thread(HotplugThreadFunc);
m_wakeup_eventfd = eventfd(0, 0);
ASSERT_MSG(CONTROLLERINTERFACE, m_wakeup_eventfd != -1, "Couldn't create eventfd.");
m_hotplug_thread = std::thread(&InputBackend::HotplugThreadFunc, this);
}

static void StopHotplugThread()
void InputBackend::StopHotplugThread()
{
// Tell the hotplug thread to stop.
if (!s_hotplug_thread_running.TestAndClear())
if (!m_hotplug_thread_running.TestAndClear())
{
// It wasn't running, we're done.
return;
}

// Write something to efd so that select() stops blocking.
const uint64_t value = 1;
static_cast<void>(!write(s_wakeup_eventfd, &value, sizeof(uint64_t)));
static_cast<void>(!write(m_wakeup_eventfd, &value, sizeof(uint64_t)));

s_hotplug_thread.join();
close(s_wakeup_eventfd);
m_hotplug_thread.join();
close(m_wakeup_eventfd);
}

void Init()
InputBackend::InputBackend(ControllerInterface* controller_interface)
: ciface::InputBackend(controller_interface)
{
StartHotplugThread();
}

// Only call this when ControllerInterface::m_devices_population_mutex is locked
void PopulateDevices()
void InputBackend::PopulateDevices()
{
// Don't run if we are not initialized
if (!s_hotplug_thread_running.IsSet())
if (!m_hotplug_thread_running.IsSet())
{
return;
}
@@ -431,7 +459,7 @@ void PopulateDevices()
udev_unref(udev);
}

void Shutdown()
InputBackend::~InputBackend()
{
StopHotplugThread();
}
@@ -627,16 +655,25 @@ const char* evdevDevice::GetPhysicalLocation() const
return libevdev_get_phys(m_nodes.front().device);
}

evdevDevice::evdevDevice(InputBackend* input_backend) : m_input_backend(*input_backend)
{
}

evdevDevice::~evdevDevice()
{
for (auto& node : m_nodes)
{
s_devnode_objects.erase(node.devnode);
m_input_backend.RemoveDevnodeObject(node.devnode);
libevdev_free(node.device);
close(node.fd);
}
}

void InputBackend::RemoveDevnodeObject(const std::string& node)
{
m_devnode_objects.erase(node);
}

void evdevDevice::UpdateInput()
{
// Run through all evdev events
9 Source/Core/InputCommon/ControllerInterface/evdev/evdev.h
View file
@@ -11,9 +11,9 @@

namespace ciface::evdev
{
void Init();
void PopulateDevices();
void Shutdown();
class InputBackend;

std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);

class evdevDevice : public Core::Device
{
@@ -75,6 +75,7 @@ class evdevDevice : public Core::Device
void UpdateInput() override;
bool IsValid() const override;

evdevDevice(InputBackend* input_backend);
~evdevDevice();

// Return true if node was "interesting".
@@ -97,5 +98,7 @@ class evdevDevice : public Core::Device
};

std::vector<Node> m_nodes;

InputBackend& m_input_backend;
};
} // namespace ciface::evdev