1//
2// Copyright 2019 The Abseil Authors.
3//
4// Licensed under the Apache License, Version 2.0 (the "License");
5// you may not use this file except in compliance with the License.
6// You may obtain a copy of the License at
7//
8// https://www.apache.org/licenses/LICENSE-2.0
9//
10// Unless required by applicable law or agreed to in writing, software
11// distributed under the License is distributed on an "AS IS" BASIS,
12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13// See the License for the specific language governing permissions and
14// limitations under the License.
15
16#include "absl/flags/internal/program_name.h"
17
18#include <string>
19
20#include "absl/flags/internal/path_util.h"
21#include "absl/synchronization/mutex.h"
22
23namespace absl {
24namespace flags_internal {
25
26ABSL_CONST_INIT static absl::Mutex program_name_guard(absl::kConstInit);
27ABSL_CONST_INIT static std::string* program_name
28 GUARDED_BY(program_name_guard) = nullptr;
29
30std::string ProgramInvocationName() {
31 absl::MutexLock l(&program_name_guard);
32
33 return program_name ? *program_name : "UNKNOWN";
34}
35
36std::string ShortProgramInvocationName() {
37 absl::MutexLock l(&program_name_guard);
38
39 return program_name ? std::string(flags_internal::Basename(*program_name))
40 : "UNKNOWN";
41}
42
43void SetProgramInvocationName(absl::string_view prog_name_str) {
44 absl::MutexLock l(&program_name_guard);
45
46 if (!program_name)
47 program_name = new std::string(prog_name_str);
48 else
49 program_name->assign(prog_name_str.data(), prog_name_str.size());
50}
51
52} // namespace flags_internal
53} // namespace absl
54