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83 lines
2.0 KiB
C++
83 lines
2.0 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 <unistd.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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#ifndef ENOERR
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#define ENOERR (0)
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#endif
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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 == ENOERR) return {ENOERR};
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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 ? ENOERR : (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_str(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("failed: strerror_r(code = {}, buf, buf-size = {}). error = {}",
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(int)code.value(), sizeof(msg_buf), 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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/**
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* @brief Gets configuration information at run time
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* https://man7.org/linux/man-pages/man2/getpagesize.2.html
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* https://man7.org/linux/man-pages/man3/sysconf.3.html
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*/
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result<std::int64_t> conf(info r) noexcept {
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LIBIMP_LOG_();
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switch (r) {
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case info::page_size: {
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auto val = ::sysconf(_SC_PAGESIZE);
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if (val >= 0) return (std::int64_t)val;
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break;
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}
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default:
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log.error("invalid info = {}", enum_cast(r));
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return {};
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}
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auto err = sys::error();
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log.error("info = {}, error = {}", enum_cast(r), err);
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return {false, (int)err.value()};
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}
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} // namespace sys
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LIBIMP_NAMESPACE_END_
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