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/*
RCC-Project
Copyright (C) 2026 Richard Qin
This file is part of RCC-Project.
RCC-Project is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your option) any
later version.
RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
RCC-Project; see the file COPYING. If not see
<http://www.gnu.org/licenses/>.
*/
// This implementation is based on llvm/include/llvm/Support/Errno.h.
#ifndef RCC_SUPPORT_ERRNO_H
#define RCC_SUPPORT_ERRNO_H
#include "CoreLib/Compiler/Compiler.h"
#include <cerrno>
#include <string>
namespace rcc
{
namespace sys
{
/// Returns a string representation of the errno value, using whatever
/// thread-safe variant of strerror() is available. Be sure to call this
/// immediately after the function that set errno, or errno may have been
/// overwritten by an intervening call.
RCC_ABI std::string
StrError ();
/// Like the no-argument version above, but uses \p errnum instead of errno.
RCC_ABI std::string
StrError (int errnum);
template <typename FailT, typename Fun, typename... Args>
inline decltype (auto)
RetryAfterSignal (const FailT &Fail, const Fun &F, const Args &...As)
{
decltype (F (As...)) Res;
do
{
errno = 0;
Res = F (As...);
} while (Res == Fail && errno == EINTR);
return Res;
}
} // namespace sys
} // namespace rcc
#endif // RCC_SUPPORT_ERRNO_H
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