Hallo, dies ist ein Test.

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/*
 * Copyright (c) 1988, 2019, Oracle and/or its affiliates. All rights reserved.
 */

#ifndef _MALLOC_H
#define	_MALLOC_H

#include <sys/types.h>

#ifdef	__cplusplus
extern "C" {
#endif

/*
 *	Constants defining mallopt operations
 */
#define	M_MXFAST	1	/* set size of blocks to be fast */
#define	M_NLBLKS	2	/* set number of block in a holding block */
#define	M_GRAIN		3	/* set number of sizes mapped to one, for */
				/* small blocks */
#define	M_KEEP		4	/* retain contents of block after a free */
				/* until another allocation */
/*
 *	structure filled by
 */
struct mallinfo  {
	unsigned long arena;	/* total space in arena */
	unsigned long ordblks;	/* number of ordinary blocks */
	unsigned long smblks;	/* number of small blocks */
	unsigned long hblks;	/* number of holding blocks */
	unsigned long hblkhd;	/* space in holding block headers */
	unsigned long usmblks;	/* space in small blocks in use */
	unsigned long fsmblks;	/* space in free small blocks */
	unsigned long uordblks;	/* space in ordinary blocks in use */
	unsigned long fordblks;	/* space in free ordinary blocks */
	unsigned long keepcost;	/* cost of enabling keep option */
};

extern void *malloc(size_t);
extern void free(void *);
extern void *realloc(void *, size_t);
extern int mallopt(int, int);
extern struct mallinfo mallinfo(void);
extern void *calloc(size_t, size_t);
extern size_t malloc_usable_size(void *);

#ifdef	__cplusplus
}
#endif

#endif	/* _MALLOC_H */