1/*	$OpenBSD: util.h,v 1.6 2019/01/25 00:19:26 millert Exp $	*/
2
3/*
4 * Placed in the public domain by Todd C. Miller <millert@openbsd.org>
5 * on October 9, 2004.
6 */
7
8#define	MMAP(ptr, len, prot, flags, fd, off)	do {		\
9	if ((ptr = mmap(NULL, len, prot, flags, fd, off)) == MAP_FAILED) { \
10		usemmap = 0;						\
11		if (errno != EINVAL)					\
12			warn("mmap");					\
13		else if ((ptr = malloc(len)) == NULL) {			\
14			ptr = MAP_FAILED;				\
15			warn("malloc");					\
16		} else if (pread(fd, ptr, len, off) != len) {		\
17			free(ptr);					\
18			ptr = MAP_FAILED;				\
19			warn("pread");					\
20		}							\
21	}								\
22} while (0)
23
24#define MUNMAP(addr, len)	do {					\
25	if (usemmap)							\
26		munmap(addr, len);					\
27	else								\
28		free(addr);						\
29	addr = NULL;							\
30} while (0)
31
32extern int usemmap;
33extern int dynamic_only;
34
35struct xnlist {
36	struct nlist nl;
37	unsigned long n_size;
38};
39