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// SPDX-FileCopyrightText: 2023-2025, Alejandro Colomar <alx@kernel.org>
// SPDX-License-Identifier: BSD-3-Clause
#ifndef SHADOW_INCLUDE_LIB_EXIT_IF_NULL_H_
#define SHADOW_INCLUDE_LIB_EXIT_IF_NULL_H_
#include "config.h"
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include "shadowlog.h"
#include "string/strerrno.h"
/*
* This macro is used for implementing x*() variants of functions that
* allocate memory, such as xstrdup() for wrapping strdup(3). The macro
* returns the input pointer transparently, with the same type, but
* calls exit(3) if the input is a null pointer (thus, if the allocation
* failed).
*/
#define exit_if_null(p) \
({ \
__auto_type p_ = p; \
\
exit_if_null_(p_); \
p_; \
})
inline void exit_if_null_(void *p);
inline void
exit_if_null_(void *p)
{
if (p == NULL) {
fprintf(log_get_logfd(), "%s: %s\n", log_get_progname(), strerrno());
exit(13);
}
}
#endif // include guard
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