forked from dolphin-emu/dolphin
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
// Copyright 2017 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include <libusb.h>
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#include <memory>
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#include <mutex>
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#include "Common/LibusbContext.h"
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#include "Common/MsgHandler.h"
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#include "Common/StringUtil.h"
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namespace LibusbContext
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{
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static std::shared_ptr<libusb_context> s_libusb_context;
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static std::once_flag s_context_initialized;
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static libusb_context* Create()
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{
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libusb_context* context;
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const int ret = libusb_init(&context);
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if (ret < LIBUSB_SUCCESS)
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{
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bool is_windows = false;
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#ifdef _WIN32
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is_windows = true;
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#endif
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const std::string reason =
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is_windows && ret == LIBUSB_ERROR_NOT_FOUND ?
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GetStringT("Failed to initialize libusb because usbdk is not installed.") :
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StringFromFormat(GetStringT("Failed to initialize libusb (%s).").c_str(),
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libusb_error_name(ret));
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PanicAlertT("%s\nSome USB features will not work.", reason.c_str());
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return nullptr;
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}
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return context;
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}
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std::shared_ptr<libusb_context> Get()
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{
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std::call_once(s_context_initialized, []() {
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s_libusb_context.reset(Create(), [](auto* context) {
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if (context != nullptr)
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libusb_exit(context);
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});
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});
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return s_libusb_context;
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}
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}
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