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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "GetKnownFolderPath.h"
namespace mozilla {
UniquePtr<wchar_t, LoadedCoTaskMemFreeDeleter> GetKnownFolderPath(
REFKNOWNFOLDERID folderId) {
static decltype(SHGetKnownFolderPath)* shGetKnownFolderPath = nullptr;
if (!shGetKnownFolderPath) {
// We could go out of our way to `FreeLibrary` on this, decrementing its
// ref count and potentially unloading it. However doing so would be either
// effectively a no-op, or counterproductive. Just let it get cleaned up
// when the process is terminated, because we're going to load it anyway
// elsewhere.
HMODULE shell32Dll = ::LoadLibraryW(L"shell32");
if (!shell32Dll) {
return nullptr;
}
shGetKnownFolderPath = reinterpret_cast<decltype(shGetKnownFolderPath)>(
::GetProcAddress(shell32Dll, "SHGetKnownFolderPath"));
if (!shGetKnownFolderPath) {
return nullptr;
}
}
PWSTR path = nullptr;
shGetKnownFolderPath(folderId, 0, nullptr, &path);
return UniquePtr<wchar_t, LoadedCoTaskMemFreeDeleter>(path);
}
} // namespace mozilla