shadow/lib/alloc.h

/*
 * SPDX-FileCopyrightText:  2023, Alejandro Colomar <alx@kernel.org>
 *
 * SPDX-License-Identifier:  BSD-3-Clause
 */


#ifndef SHADOW_INCLUDE_LIB_MALLOC_H_
#define SHADOW_INCLUDE_LIB_MALLOC_H_


#include <config.h>

#include <assert.h>
#include <errno.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>

#include "defines.h"


ATTR_MALLOC(free)
inline void *xmalloc(size_t size);
ATTR_MALLOC(free)
inline void *xmallocarray(size_t nmemb, size_t size);
ATTR_MALLOC(free)
inline void *mallocarray(size_t nmemb, size_t size);
ATTR_MALLOC(free)
inline void *reallocarrayf(void *p, size_t nmemb, size_t size);
ATTR_MALLOC(free)
inline char *xstrdup(const char *str);

ATTR_MALLOC(free)
void *xcalloc(size_t nmemb, size_t size);
ATTR_MALLOC(free)
void *xreallocarray(void *p, size_t nmemb, size_t size);


inline void *
xmalloc(size_t size)
{
	return xmallocarray(1, size);
}


inline void *
xmallocarray(size_t nmemb, size_t size)
{
	return xreallocarray(NULL, nmemb, size);
}


inline void *
mallocarray(size_t nmemb, size_t size)
{
	return reallocarray(NULL, nmemb, size);
}


inline void *
reallocarrayf(void *p, size_t nmemb, size_t size)
{
	void  *q;

	q = reallocarray(p, nmemb, size);

	/* realloc(p, 0) is equivalent to free(p);  avoid double free.  */
	if (q == NULL && nmemb != 0 && size != 0)
		free(p);
	return q;
}


inline char *
xstrdup(const char *str)
{
	return strcpy(XMALLOCARRAY(strlen(str) + 1, char), str);
}


#endif  // include guard