| /* |
| * Copyright (c) 2020 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "rtc_base/win/hstring.h" |
| |
| #include <libloaderapi.h> |
| #include <winstring.h> |
| |
| namespace { |
| |
| FARPROC LoadComBaseFunction(const char* function_name) { |
| static HMODULE const handle = |
| ::LoadLibraryExW(L"combase.dll", nullptr, LOAD_LIBRARY_SEARCH_SYSTEM32); |
| return handle ? ::GetProcAddress(handle, function_name) : nullptr; |
| } |
| |
| decltype(&::WindowsCreateString) GetWindowsCreateString() { |
| static decltype(&::WindowsCreateString) const function = |
| reinterpret_cast<decltype(&::WindowsCreateString)>( |
| LoadComBaseFunction("WindowsCreateString")); |
| return function; |
| } |
| |
| decltype(&::WindowsDeleteString) GetWindowsDeleteString() { |
| static decltype(&::WindowsDeleteString) const function = |
| reinterpret_cast<decltype(&::WindowsDeleteString)>( |
| LoadComBaseFunction("WindowsDeleteString")); |
| return function; |
| } |
| |
| } // namespace |
| |
| namespace webrtc { |
| |
| bool ResolveCoreWinRTStringDelayload() { |
| return GetWindowsDeleteString() && GetWindowsCreateString(); |
| } |
| |
| HRESULT CreateHstring(const wchar_t* src, uint32_t len, HSTRING* out_hstr) { |
| decltype(&::WindowsCreateString) create_string_func = |
| GetWindowsCreateString(); |
| if (!create_string_func) |
| return E_FAIL; |
| return create_string_func(src, len, out_hstr); |
| } |
| |
| HRESULT DeleteHstring(HSTRING hstr) { |
| decltype(&::WindowsDeleteString) delete_string_func = |
| GetWindowsDeleteString(); |
| if (!delete_string_func) |
| return E_FAIL; |
| return delete_string_func(hstr); |
| } |
| |
| } // namespace webrtc |