mirror of
https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
synced 2025-09-15 18:26:12 -04:00
81 lines
2.7 KiB
C
81 lines
2.7 KiB
C
/* malloc with out of memory checking.
|
|
Copyright (C) 2001-2004 Free Software Foundation, Inc.
|
|
Written by Bruno Haible <haible@clisp.cons.org>, 2001.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software Foundation,
|
|
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef _XALLOC_H
|
|
#define _XALLOC_H
|
|
|
|
#include <stddef.h>
|
|
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/* Defined in xmalloc.c. */
|
|
|
|
/* Allocate SIZE bytes of memory dynamically, with error checking. */
|
|
extern void *xmalloc (size_t size);
|
|
|
|
/* Allocate memory for NMEMB elements of SIZE bytes, with error checking. */
|
|
extern void *xcalloc (size_t nmemb, size_t size);
|
|
|
|
/* Change the size of an allocated block of memory PTR to SIZE bytes,
|
|
with error checking. If PTR is NULL, run xmalloc. */
|
|
extern void *xrealloc (void *ptr, size_t size);
|
|
|
|
/* This function is always triggered when memory is exhausted. It is
|
|
in charge of honoring the three previous items. This is the
|
|
function to call when one wants the program to die because of a
|
|
memory allocation failure. */
|
|
extern void xalloc_die (void)
|
|
#if (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5)) && !__STRICT_ANSI__
|
|
__attribute__ ((__noreturn__))
|
|
#endif
|
|
;
|
|
|
|
|
|
/* Defined in xstrdup.c. */
|
|
|
|
/* Return a newly allocated copy of STRING. */
|
|
extern char *xstrdup (const char *string);
|
|
|
|
|
|
/* Return 1 if an array of N objects, each of size S, cannot exist due
|
|
to size arithmetic overflow. S must be positive and N must be
|
|
nonnegative. This is a macro, not an inline function, so that it
|
|
works correctly even when SIZE_MAX < N.
|
|
|
|
By gnulib convention, SIZE_MAX represents overflow in size
|
|
calculations, so the conservative dividend to use here is
|
|
SIZE_MAX - 1, since SIZE_MAX might represent an overflowed value.
|
|
However, malloc (SIZE_MAX) fails on all known hosts where
|
|
sizeof (ptrdiff_t) <= sizeof (size_t), so do not bother to test for
|
|
exactly-SIZE_MAX allocations on such hosts; this avoids a test and
|
|
branch when S is known to be 1. */
|
|
# define xalloc_oversized(n, s) \
|
|
((size_t) (sizeof (ptrdiff_t) <= sizeof (size_t) ? -1 : -2) / (s) < (n))
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
|
|
#endif /* _XALLOC_H */
|