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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
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17
Source/Core/UICommon/USBUtils.cpp
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@ -8,6 +8,7 @@
#include "Common/CommonTypes.h"
#include "Common/StringUtil.h"
#include "Core/LibusbUtils.h"
#include "UICommon/USBUtils.h"
// Because opening and getting the device name from devices is slow, especially on Windows
@ -34,21 +35,17 @@ std::map<std::pair<u16, u16>, std::string> GetInsertedDevices()
std::map<std::pair<u16, u16>, std::string> devices;
#ifdef __LIBUSB__
libusb_context* context = nullptr;
if (libusb_init(&context) < 0)
auto& context = LibusbUtils::GetContext();
if (!context.IsValid())
return devices;
libusb_device** list;
const ssize_t cnt = libusb_get_device_list(context, &list);
for (ssize_t i = 0; i < cnt; ++i)
{
context.GetDeviceList([&](libusb_device* device) {
libusb_device_descriptor descr;
libusb_get_device_descriptor(list[i], &descr);
libusb_get_device_descriptor(device, &descr);
const std::pair<u16, u16> vid_pid{descr.idVendor, descr.idProduct};
devices[vid_pid] = GetDeviceName(vid_pid);
}
libusb_free_device_list(list, 1);
libusb_exit(context);
return true;
});
#endif
return devices;