1 // Copyright 2020 The Abseil Authors.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //      https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef ABSL_BASE_INTERNAL_STRERROR_H_
16 #define ABSL_BASE_INTERNAL_STRERROR_H_
17 
18 #include <string>
19 
20 #include "absl/base/config.h"
21 
22 namespace absl {
23 ABSL_NAMESPACE_BEGIN
24 namespace base_internal {
25 
26 // A portable and thread-safe alternative to C89's `strerror`.
27 //
28 // The C89 specification of `strerror` is not suitable for use in a
29 // multi-threaded application as the returned string may be changed by calls to
30 // `strerror` from another thread.  The many non-stdlib alternatives differ
31 // enough in their names, availability, and semantics to justify this wrapper
32 // around them.  `errno` will not be modified by a call to `absl::StrError`.
33 std::string StrError(int errnum);
34 
35 }  // namespace base_internal
36 ABSL_NAMESPACE_END
37 }  // namespace absl
38 
39 #endif  // ABSL_BASE_INTERNAL_STRERROR_H_
40