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#include <cerrno>
#include <cstring>
#include <c10/util/error.h>
#include <string>
#include <type_traits>
namespace c10::utils {
// Get an error string in the thread-safe way.
std::string str_error(int errnum) {
auto old_errno = errno;
std::string buf(256, '\0');
#if defined(_WIN32)
auto res [[maybe_unused]] = strerror_s(buf.data(), buf.size(), errnum);
buf.resize(strlen(buf.c_str()));
#else
auto res [[maybe_unused]] = strerror_r(errnum, buf.data(), buf.size());
if constexpr (std::is_same_v<decltype(res), int>) {
buf.resize(strlen(buf.c_str()));
} else {
if (res) {
buf = res;
}
}
#endif
errno = old_errno;
return buf;
}
} // namespace c10::utils
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