1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
| //===-- UserIDResolver.cpp --------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Utility/UserIDResolver.h"
#include "llvm/Support/ManagedStatic.h"
using namespace lldb_private;
UserIDResolver::~UserIDResolver() = default;
llvm::Optional<llvm::StringRef> UserIDResolver::Get(
id_t id, Map &cache,
llvm::Optional<std::string> (UserIDResolver::*do_get)(id_t)) {
std::lock_guard<std::mutex> guard(m_mutex);
auto iter_bool = cache.try_emplace(id, llvm::None);
if (iter_bool.second)
iter_bool.first->second = (this->*do_get)(id);
if (iter_bool.first->second)
return llvm::StringRef(*iter_bool.first->second);
return llvm::None;
}
namespace {
class NoopResolver : public UserIDResolver {
protected:
llvm::Optional<std::string> DoGetUserName(id_t uid) override {
return llvm::None;
}
llvm::Optional<std::string> DoGetGroupName(id_t gid) override {
return llvm::None;
}
};
} // namespace
static llvm::ManagedStatic<NoopResolver> g_noop_resolver;
UserIDResolver &UserIDResolver::GetNoopResolver() { return *g_noop_resolver; }
|