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55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
/**
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* @file libimp/platform/posix/system.h
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* @author mutouyun (orz@orzz.org)
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*/
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#pragma once
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#include <errno.h>
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#include <string.h>
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#include "libimp/system.h"
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#include "libimp/log.h"
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LIBIMP_NAMESPACE_BEG_
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namespace sys {
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/**
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* @brief Get the system error code
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* https://man7.org/linux/man-pages/man3/errno.3.html
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*/
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result_code error_code() noexcept {
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auto err = errno;
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if (err == 0) return {true};
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return {false, std::uint64_t(err)};
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}
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/**
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* @brief Set the system error code
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* https://man7.org/linux/man-pages/man3/errno.3.html
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*/
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void error_code(result_code code) noexcept {
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errno = code ? 0 : (int)code.value();
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}
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/**
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* @brief Gets a text description of the system error
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* https://man7.org/linux/man-pages/man3/strerror_l.3.html
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* https://manpages.ubuntu.com/manpages/xenial/en/man3/strerror.3.html
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*/
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std::string error_msg(result_code code) noexcept {
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char msg_buf[256] {};
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#if ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
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LIBIMP_LOG_();
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if (::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf)) != 0) {
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log.error("strerror_r fails. return = {}", error_code());
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return {};
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}
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return msg_buf;
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#else
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return ::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf));
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#endif
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}
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} // namespace sys
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LIBIMP_NAMESPACE_END_
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