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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===- llvm/Support/Errno.h - Portable+convenient errno handling -*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file declares some portable and convenient functions to deal with errno. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |||
| 13 | #ifndef LLVM_SUPPORT_ERRNO_H |
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| 14 | #define LLVM_SUPPORT_ERRNO_H |
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| 15 | |||
| 16 | #include <cerrno> |
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| 17 | #include <string> |
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| 18 | |||
| 19 | namespace llvm { |
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| 20 | namespace sys { |
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| 21 | |||
| 22 | /// Returns a string representation of the errno value, using whatever |
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| 23 | /// thread-safe variant of strerror() is available. Be sure to call this |
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| 24 | /// immediately after the function that set errno, or errno may have been |
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| 25 | /// overwritten by an intervening call. |
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| 26 | std::string StrError(); |
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| 27 | |||
| 28 | /// Like the no-argument version above, but uses \p errnum instead of errno. |
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| 29 | std::string StrError(int errnum); |
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| 30 | |||
| 31 | template <typename FailT, typename Fun, typename... Args> |
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| 32 | inline decltype(auto) RetryAfterSignal(const FailT &Fail, const Fun &F, |
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| 33 | const Args &... As) { |
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| 34 | decltype(F(As...)) Res; |
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| 35 | do { |
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| 36 | errno = 0; |
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| 37 | Res = F(As...); |
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| 38 | } while (Res == Fail && errno == EINTR); |
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| 39 | return Res; |
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| 40 | } |
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| 41 | |||
| 42 | } // namespace sys |
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| 43 | } // namespace llvm |
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| 44 | |||
| 45 | #endif // LLVM_SUPPORT_ERRNO_H |