strerror.h (1386B)
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_