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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};