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[libc][annex_k] Add libc_constraint_handler macros. #163316

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[libc][annex_k] Add libc_constraint_handler macros. #163316

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9 changes: 9 additions & 0 deletions libc/src/__support/annex_k/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,15 @@ add_header_library(
libc.src.stdlib.abort
)

add_header_library(
constraint_macros
HDRS
constraint_macros.h
DEPENDS
.libc_constraint_handler
libc.src.__support.libc_errno
)

add_header_library(
libc_constraint_handler
HDRS
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44 changes: 44 additions & 0 deletions libc/src/__support/annex_k/constraint_macros.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,44 @@
//===-- Helper macros header for constraint violations ----------*- 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
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_LIBC_SRC___SUPPORT_ANNEX_K_MACROS_H
#define LLVM_LIBC_SRC___SUPPORT_ANNEX_K_MACROS_H

#include "libc_constraint_handler.h"
#include "src/__support/libc_errno.h"

#define _CONSTRAINT_VIOLATION(msg, error_code, ret_code) \
{ \
libc_errno = error_code; \
libc_constraint_handler(msg, nullptr, error_code); \
return ret_code; \
}

#define _CONSTRAINT_VIOLATION_IF(expr, error_code, return_code) \
{ \
auto expr_val = expr; \
if (expr_val) { \
libc_errno = error_code; \
libc_constraint_handler(nullptr, nullptr, error_code); \
return return_code; \
} \
}

#define _CONSTRAINT_VIOLATION_CLEANUP_IF(expr, cleanup, error_code, \
return_code) \
{ \
auto expr_val = expr; \
if (expr_val) { \
cleanup; \
libc_errno = error_code; \
libc_constraint_handler(nullptr, nullptr, error_code); \
return return_code; \
} \
}

#endif // LLVM_LIBC_SRC___SUPPORT_ANNEX_K_MACROS_H
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