69258491d2
Rather than selecting the errno implementation based on the platform which doesn't provide the necessary flexibility, make it configurable. The errno value location is returned by `int *__llvm_libc_errno()` which is a common design used by other C libraries.
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
//===-- Implementation header for libc_errno --------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIBC_SRC_ERRNO_LIBC_ERRNO_H
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#define LLVM_LIBC_SRC_ERRNO_LIBC_ERRNO_H
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#include "src/__support/macros/attributes.h"
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#include "src/__support/macros/config.h"
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#include "src/__support/macros/properties/architectures.h"
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#include "hdr/errno_macros.h"
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// This header is to be consumed by internal implementations, in which all of
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// them should refer to `libc_errno` instead of using `errno` directly from
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// <errno.h> header.
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// Unit and hermetic tests should:
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// - #include "src/errno/libc_errno.h"
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// - NOT #include <errno.h>
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// - Only use `libc_errno` in the code
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// - Depend on libc.src.errno.errno
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// Integration tests should:
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// - NOT #include "src/errno/libc_errno.h"
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// - #include <errno.h>
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// - Use regular `errno` in the code
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// - Still depend on libc.src.errno.errno
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namespace LIBC_NAMESPACE_DECL {
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struct Errno {
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void operator=(int);
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operator int();
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};
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extern Errno libc_errno;
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} // namespace LIBC_NAMESPACE_DECL
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#endif // LLVM_LIBC_SRC_ERRNO_LIBC_ERRNO_H
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