2003-05-02 00:48:41 +00:00
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/* xalloc.h -- malloc with out-of-memory checking
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Copyright (C) 1990-1998, 1999, 2000 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef XALLOC_H_
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# define XALLOC_H_
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2003-06-18 12:57:43 +00:00
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# include <stddef.h>
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2003-05-02 00:48:41 +00:00
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# ifndef PARAMS
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# if defined PROTOTYPES || (defined __STDC__ && __STDC__)
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# define PARAMS(Args) Args
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# else
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# define PARAMS(Args) ()
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# endif
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# endif
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# ifndef __attribute__
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# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
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# define __attribute__(x)
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# endif
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# endif
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# ifndef ATTRIBUTE_NORETURN
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# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
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# endif
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/* Exit value when the requested amount of memory is not available.
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It is initialized to EXIT_FAILURE, but the caller may set it to
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some other value. */
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extern int xalloc_exit_failure;
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/* If this pointer is non-zero, run the specified function upon each
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allocation failure. It is initialized to zero. */
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extern void (*xalloc_fail_func) PARAMS ((void));
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/* If XALLOC_FAIL_FUNC is undefined or a function that returns, this
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message is output. It is translated via gettext.
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Its value is "memory exhausted". */
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extern char const xalloc_msg_memory_exhausted[];
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/* This function is always triggered when memory is exhausted. It is
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in charge of honoring the three previous items. This is the
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function to call when one wants the program to die because of a
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memory allocation failure. */
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extern void xalloc_die PARAMS ((void)) ATTRIBUTE_NORETURN;
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void *xmalloc PARAMS ((size_t n));
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void *xcalloc PARAMS ((size_t n, size_t s));
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void *xrealloc PARAMS ((void *p, size_t n));
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char *xstrdup PARAMS ((const char *str));
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# define XMALLOC(Type, N_items) ((Type *) xmalloc (sizeof (Type) * (N_items)))
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# define XCALLOC(Type, N_items) ((Type *) xcalloc (sizeof (Type), (N_items)))
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# define XREALLOC(Ptr, Type, N_items) \
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((Type *) xrealloc ((void *) (Ptr), sizeof (Type) * (N_items)))
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/* Declare and alloc memory for VAR of type TYPE. */
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# define NEW(Type, Var) Type *(Var) = XMALLOC (Type, 1)
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/* Free VAR only if non NULL. */
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# define XFREE(Var) \
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do { \
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if (Var) \
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free (Var); \
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} while (0)
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/* Return a pointer to a malloc'ed copy of the array SRC of NUM elements. */
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# define CCLONE(Src, Num) \
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(memcpy (xmalloc (sizeof (*Src) * (Num)), (Src), sizeof (*Src) * (Num)))
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/* Return a malloc'ed copy of SRC. */
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# define CLONE(Src) CCLONE (Src, 1)
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#endif /* !XALLOC_H_ */
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