forked from OSchip/llvm-project
45 lines
1.3 KiB
C++
45 lines
1.3 KiB
C++
//===-- UserIDResolver.cpp ------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Utility/UserIDResolver.h"
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#include "llvm/Support/ManagedStatic.h"
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using namespace lldb_private;
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UserIDResolver::~UserIDResolver() = default;
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llvm::Optional<llvm::StringRef> UserIDResolver::Get(
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id_t id, Map &cache,
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llvm::Optional<std::string> (UserIDResolver::*do_get)(id_t)) {
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std::lock_guard<std::mutex> guard(m_mutex);
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auto iter_bool = cache.try_emplace(id, llvm::None);
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if (iter_bool.second)
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iter_bool.first->second = (this->*do_get)(id);
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if (iter_bool.first->second)
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return llvm::StringRef(*iter_bool.first->second);
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return llvm::None;
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}
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namespace {
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class NoopResolver : public UserIDResolver {
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protected:
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llvm::Optional<std::string> DoGetUserName(id_t uid) override {
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return llvm::None;
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}
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llvm::Optional<std::string> DoGetGroupName(id_t gid) override {
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return llvm::None;
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}
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};
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} // namespace
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static llvm::ManagedStatic<NoopResolver> g_noop_resolver;
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UserIDResolver &UserIDResolver::GetNoopResolver() { return *g_noop_resolver; }
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