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Revision 1.2, Sat Oct 9 22:11:11 2004 UTC (19 years, 7 months ago) by millert
Branch: MAIN
CVS Tags: OPENBSD_5_7_BASE, OPENBSD_5_7, OPENBSD_5_6_BASE, OPENBSD_5_6, OPENBSD_5_5_BASE, OPENBSD_5_5, OPENBSD_5_4_BASE, OPENBSD_5_4, OPENBSD_5_3_BASE, OPENBSD_5_3, OPENBSD_5_2_BASE, OPENBSD_5_2, OPENBSD_5_1_BASE, OPENBSD_5_1, OPENBSD_5_0_BASE, OPENBSD_5_0, OPENBSD_4_9_BASE, OPENBSD_4_9, OPENBSD_4_8_BASE, OPENBSD_4_8, OPENBSD_4_7_BASE, OPENBSD_4_7, OPENBSD_4_6_BASE, OPENBSD_4_6, OPENBSD_4_5_BASE, OPENBSD_4_5, OPENBSD_4_4_BASE, OPENBSD_4_4, OPENBSD_4_3_BASE, OPENBSD_4_3, OPENBSD_4_2_BASE, OPENBSD_4_2, OPENBSD_4_1_BASE, OPENBSD_4_1, OPENBSD_4_0_BASE, OPENBSD_4_0, OPENBSD_3_9_BASE, OPENBSD_3_9, OPENBSD_3_8_BASE, OPENBSD_3_8, OPENBSD_3_7_BASE, OPENBSD_3_7
Changes since 1.1: +6 -1 lines 

My MMAP/MUNMAP macros are too simple to copyright so place this in the
public domain.  OK mickey@

/*	$OpenBSD: util.h,v 1.2 2004/10/09 22:11:11 millert Exp $	*/

/*
 * Placed in the public domain by Todd C. Miller <Todd.Miller@courtesan.com>
 * on October 9, 2004.
 */

#define	MMAP(ptr, len, prot, flags, fd, off)	do {		\
	if ((ptr = mmap(NULL, len, prot, flags, fd, off)) == MAP_FAILED) { \
		usemmap = 0;						\
		if (errno != EINVAL)					\
			warn("mmap");					\
		else if ((ptr = malloc(len)) == NULL) {			\
			ptr = MAP_FAILED;				\
			warn("malloc");					\
		} else if (pread(fd, ptr, len, off) != len) {		\
			free(ptr);					\
			ptr = MAP_FAILED;				\
			warn("pread");					\
		}							\
	}								\
} while (0)

#define MUNMAP(addr, len)	do {					\
	if (usemmap)							\
		munmap(addr, len);					\
	else								\
		free(addr);						\
} while (0)

extern int usemmap;