| 1 | //===-- UserIDResolver.cpp ------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "lldb/Utility/UserIDResolver.h" |
| 10 | #include "llvm/Support/ManagedStatic.h" |
| 11 | #include <optional> |
| 12 | |
| 13 | using namespace lldb_private; |
| 14 | |
| 15 | UserIDResolver::~UserIDResolver() = default; |
| 16 | |
| 17 | std::optional<llvm::StringRef> UserIDResolver::Get( |
| 18 | id_t id, Map &cache, |
| 19 | std::optional<std::string> (UserIDResolver::*do_get)(id_t)) { |
| 20 | |
| 21 | std::lock_guard<std::mutex> guard(m_mutex); |
| 22 | auto iter_bool = cache.try_emplace(Key: id, Args: std::nullopt); |
| 23 | if (iter_bool.second) |
| 24 | iter_bool.first->second = (this->*do_get)(id); |
| 25 | if (iter_bool.first->second) |
| 26 | return llvm::StringRef(*iter_bool.first->second); |
| 27 | return std::nullopt; |
| 28 | } |
| 29 | |
| 30 | namespace { |
| 31 | class NoopResolver : public UserIDResolver { |
| 32 | protected: |
| 33 | std::optional<std::string> DoGetUserName(id_t uid) override { |
| 34 | return std::nullopt; |
| 35 | } |
| 36 | |
| 37 | std::optional<std::string> DoGetGroupName(id_t gid) override { |
| 38 | return std::nullopt; |
| 39 | } |
| 40 | }; |
| 41 | } // namespace |
| 42 | |
| 43 | static llvm::ManagedStatic<NoopResolver> g_noop_resolver; |
| 44 | |
| 45 | UserIDResolver &UserIDResolver::GetNoopResolver() { return *g_noop_resolver; } |
| 46 |