47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
|
//===- llvm/Support/Errno.h - Portable+convenient errno handling -*- C++ -*-===//
|
||
|
|
//
|
||
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
//
|
||
|
|
// This file declares some portable and convenient functions to deal with errno.
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#ifndef LLVM_SUPPORT_ERRNO_H
|
||
|
|
#define LLVM_SUPPORT_ERRNO_H
|
||
|
|
|
||
|
|
#include <cerrno>
|
||
|
|
#include <string>
|
||
|
|
#include <type_traits>
|
||
|
|
|
||
|
|
namespace llvm {
|
||
|
|
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.
|
||
|
|
std::string StrError();
|
||
|
|
|
||
|
|
/// Like the no-argument version above, but uses \p errnum instead of errno.
|
||
|
|
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 llvm
|
||
|
|
|
||
|
|
#endif // LLVM_SYSTEM_ERRNO_H
|