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Move libusb utilities to LibusbUtils

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* Simplifies libusb context usage and allows us to set options for
all contexts easily. Notably, this lets us enable usbdk support
in libusb, which is now opt-in in the latest version.

* Moves the libusb config descriptor wrapper class to LibusbUtils too
since that could easily be reused.

* Moves device listing to LibusbUtils too and add a lock around it
as some libusb backends are not thread safe.

* Consequences: only a single context and a single event handling
thread is used now, which is more efficient.
This commit is contained in:
Léo Lam
2019-05-12 20:19:31 +02:00
parent 054b1172e3
commit 256c9375c9
13 changed files with 248 additions and 232 deletions
Download Patch File Download Diff File Expand all files Collapse all files

58
Source/Core/InputCommon/GCAdapter.cpp
View File

@ -15,6 +15,7 @@
#include "Core/CoreTiming.h"
#include "Core/HW/SI/SI.h"
#include "Core/HW/SystemTimers.h"
#include "Core/LibusbUtils.h"
#include "Core/NetPlayProto.h"
#include "InputCommon/GCAdapter.h"
@ -54,7 +55,6 @@ static Common::Flag s_adapter_detect_thread_running;
static std::function<void(void)> s_detect_callback;
static bool s_libusb_driver_not_supported = false;
static libusb_context* s_libusb_context;
#if defined(__FreeBSD__) && __FreeBSD__ >= 11
static bool s_libusb_hotplug_enabled = true;
#else
@ -127,6 +127,7 @@ static int HotplugCallback(libusb_context* ctx, libusb_device* dev, libusb_hotpl
static void ScanThreadFunc()
{
auto& context = LibusbUtils::GetContext();
Common::SetCurrentThreadName("GC Adapter Scanning Thread");
NOTICE_LOG(SERIALINTERFACE, "GC Adapter scanning thread started");
@ -137,7 +138,7 @@ static void ScanThreadFunc()
if (s_libusb_hotplug_enabled)
{
if (libusb_hotplug_register_callback(
s_libusb_context,
context,
(libusb_hotplug_event)(LIBUSB_HOTPLUG_EVENT_DEVICE_ARRIVED |
LIBUSB_HOTPLUG_EVENT_DEVICE_LEFT),
LIBUSB_HOTPLUG_ENUMERATE, 0x057e, 0x0337, LIBUSB_HOTPLUG_MATCH_ANY, HotplugCallback,
@ -148,24 +149,19 @@ static void ScanThreadFunc()
}
#endif
if (s_libusb_hotplug_enabled)
return;
while (s_adapter_detect_thread_running.IsSet())
{
if (s_libusb_hotplug_enabled)
if (s_handle == nullptr)
{
static timeval tv = {0, 500000};
libusb_handle_events_timeout(s_libusb_context, &tv);
}
else
{
if (s_handle == nullptr)
{
std::lock_guard<std::mutex> lk(s_init_mutex);
Setup();
if (s_detected && s_detect_callback != nullptr)
s_detect_callback();
}
Common::SleepCurrentThread(500);
std::lock_guard<std::mutex> lk(s_init_mutex);
Setup();
if (s_detected && s_detect_callback != nullptr)
s_detect_callback();
}
Common::SleepCurrentThread(500);
}
NOTICE_LOG(SERIALINTERFACE, "GC Adapter scanning thread stopped");
}
@ -198,13 +194,8 @@ void StartScanThread()
{
if (s_adapter_detect_thread_running.IsSet())
return;
const int ret = libusb_init(&s_libusb_context);
if (ret < 0)
{
ERROR_LOG(SERIALINTERFACE, "libusb_init failed with error: %d", ret);
if (!LibusbUtils::GetContext().IsValid())
return;
}
s_adapter_detect_thread_running.Set(true);
s_adapter_detect_thread = std::thread(ScanThreadFunc);
}
@ -219,27 +210,21 @@ void StopScanThread()
static void Setup()
{
libusb_device** list;
ssize_t cnt = libusb_get_device_list(s_libusb_context, &list);
for (int i = 0; i < SerialInterface::MAX_SI_CHANNELS; i++)
{
s_controller_type[i] = ControllerTypes::CONTROLLER_NONE;
s_controller_rumble[i] = 0;
}
for (int d = 0; d < cnt; d++)
{
libusb_device* device = list[d];
LibusbUtils::GetContext().GetDeviceList([](libusb_device* device) {
if (CheckDeviceAccess(device))
{
// Only connect to a single adapter in case the user has multiple connected
AddGCAdapter(device);
break;
return false;
}
}
libusb_free_device_list(list, 1);
return true;
});
}
static bool CheckDeviceAccess(libusb_device* device)
@ -342,16 +327,11 @@ void Shutdown()
{
StopScanThread();
#if defined(LIBUSB_API_VERSION) && LIBUSB_API_VERSION >= 0x01000102
if (s_libusb_context && s_libusb_hotplug_enabled)
libusb_hotplug_deregister_callback(s_libusb_context, s_hotplug_handle);
if (LibusbUtils::GetContext().IsValid() && s_libusb_hotplug_enabled)
libusb_hotplug_deregister_callback(LibusbUtils::GetContext(), s_hotplug_handle);
#endif
Reset();
if (s_libusb_context)
{
libusb_exit(s_libusb_context);
s_libusb_context = nullptr;
}
s_libusb_driver_not_supported = false;
}