mirror of
https://github.com/mutouyun/cpp-ipc.git
synced 2025-12-07 01:06:45 +08:00
88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
/**
|
|
* \file libimp/platform/win/system.h
|
|
* \author mutouyun (orz@orzz.org)
|
|
*/
|
|
#pragma once
|
|
|
|
#include <exception>
|
|
#include <type_traits>
|
|
|
|
#include <Windows.h>
|
|
#include <tchar.h>
|
|
|
|
#include "libimp/system.h"
|
|
#include "libimp/log.h"
|
|
#include "libimp/codecvt.h"
|
|
#include "libimp/underlyof.h"
|
|
#include "libimp/detect_plat.h"
|
|
#include "libimp/scope_exit.h"
|
|
|
|
LIBIMP_NAMESPACE_BEG_
|
|
namespace sys {
|
|
|
|
/**
|
|
* \brief Gets a text description of the system error
|
|
* \see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessage
|
|
*/
|
|
std::string error_string(DWORD code) noexcept {
|
|
LIBIMP_LOG_();
|
|
LIBIMP_TRY {
|
|
LPTSTR lpErrText = NULL;
|
|
if (::FormatMessage(
|
|
FORMAT_MESSAGE_ALLOCATE_BUFFER |
|
|
FORMAT_MESSAGE_FROM_SYSTEM |
|
|
FORMAT_MESSAGE_IGNORE_INSERTS,
|
|
NULL,
|
|
code,
|
|
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
|
|
(LPTSTR)&lpErrText,
|
|
0, NULL) == 0) {
|
|
log.error("failed: FormatMessage(dwMessageId = ", code, "). error = ", ::GetLastError());
|
|
return {};
|
|
}
|
|
LIBIMP_SCOPE_EXIT(finally) = [lpErrText] { ::LocalFree(lpErrText); };
|
|
std::size_t msg_len = ::_tcslen(lpErrText);
|
|
std::size_t len = cvt_cstr(lpErrText, msg_len, (char *)nullptr, 0);
|
|
if (len == 0) {
|
|
return {};
|
|
}
|
|
std::string ret(len, '\0');
|
|
cvt_cstr(lpErrText, msg_len, &ret[0], ret.size());
|
|
return ret;
|
|
} LIBIMP_CATCH(std::exception const &e) {
|
|
log.failed(e.what());
|
|
}
|
|
return {};
|
|
}
|
|
|
|
/**
|
|
* \brief Get the system error number.
|
|
* \see https://en.cppreference.com/w/cpp/error/system_category
|
|
* https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror
|
|
*/
|
|
std::error_code error() noexcept {
|
|
return std::error_code(::GetLastError(), std::system_category());
|
|
}
|
|
|
|
/**
|
|
* \brief Retrieves information about the current system.
|
|
* \see https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsysteminfo
|
|
* https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo
|
|
*/
|
|
result<std::int64_t> conf(info r) noexcept {
|
|
LIBIMP_LOG_();
|
|
switch (r) {
|
|
case info::page_size: {
|
|
::SYSTEM_INFO info {};
|
|
::GetNativeSystemInfo(&info);
|
|
return (std::int64_t)info.dwPageSize;
|
|
}
|
|
default:
|
|
log.error("invalid info = ", underlyof(r));
|
|
return std::make_error_code(std::errc::invalid_argument);
|
|
}
|
|
}
|
|
|
|
} // namespace sys
|
|
LIBIMP_NAMESPACE_END_
|