| 1 | /* xalloc.h -- malloc with out-of-memory checking
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| 2 | Copyright (C) 1990-1998, 1999, 2000 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software; you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 2, or (at your option)
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| 7 | any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program; if not, write to the Free Software Foundation,
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| 16 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 17 |
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| 18 | #ifndef XALLOC_H_
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| 19 | # define XALLOC_H_
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| 20 |
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| 21 | # ifndef PARAMS
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| 22 | # if defined PROTOTYPES || (defined __STDC__ && __STDC__)
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| 23 | # define PARAMS(Args) Args
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| 24 | # else
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| 25 | # define PARAMS(Args) ()
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| 26 | # endif
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| 27 | # endif
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| 28 |
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| 29 | # ifndef __attribute__
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| 30 | # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
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| 31 | # define __attribute__(x)
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| 32 | # endif
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| 33 | # endif
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| 34 |
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| 35 | # ifndef ATTRIBUTE_NORETURN
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| 36 | # define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__))
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| 37 | # endif
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| 38 |
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| 39 | /* Exit value when the requested amount of memory is not available.
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| 40 | It is initialized to EXIT_FAILURE, but the caller may set it to
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| 41 | some other value. */
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| 42 | extern int xalloc_exit_failure;
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| 43 |
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| 44 | /* If this pointer is non-zero, run the specified function upon each
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| 45 | allocation failure. It is initialized to zero. */
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| 46 | extern void (*xalloc_fail_func) PARAMS ((void));
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| 47 |
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| 48 | /* If XALLOC_FAIL_FUNC is undefined or a function that returns, this
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| 49 | message is output. It is translated via gettext.
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| 50 | Its value is "memory exhausted". */
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| 51 | extern char const xalloc_msg_memory_exhausted[];
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| 52 |
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| 53 | /* This function is always triggered when memory is exhausted. It is
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| 54 | in charge of honoring the three previous items. This is the
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| 55 | function to call when one wants the program to die because of a
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| 56 | memory allocation failure. */
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| 57 | extern void xalloc_die PARAMS ((void)) ATTRIBUTE_NORETURN;
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| 58 |
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| 59 | void *xmalloc PARAMS ((size_t n));
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| 60 | void *xcalloc PARAMS ((size_t n, size_t s));
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| 61 | void *xrealloc PARAMS ((void *p, size_t n));
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| 62 | char *xstrdup PARAMS ((const char *str));
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| 63 |
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| 64 | # define XMALLOC(Type, N_items) ((Type *) xmalloc (sizeof (Type) * (N_items)))
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| 65 | # define XCALLOC(Type, N_items) ((Type *) xcalloc (sizeof (Type), (N_items)))
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| 66 | # define XREALLOC(Ptr, Type, N_items) \
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| 67 | ((Type *) xrealloc ((void *) (Ptr), sizeof (Type) * (N_items)))
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| 68 |
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| 69 | /* Declare and alloc memory for VAR of type TYPE. */
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| 70 | # define NEW(Type, Var) Type *(Var) = XMALLOC (Type, 1)
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| 71 |
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| 72 | /* Free VAR only if non NULL. */
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| 73 | # define XFREE(Var) \
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| 74 | do { \
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| 75 | if (Var) \
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| 76 | free (Var); \
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| 77 | } while (0)
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| 78 |
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| 79 | /* Return a pointer to a malloc'ed copy of the array SRC of NUM elements. */
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| 80 | # define CCLONE(Src, Num) \
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| 81 | (memcpy (xmalloc (sizeof (*Src) * (Num)), (Src), sizeof (*Src) * (Num)))
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| 82 |
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| 83 | /* Return a malloc'ed copy of SRC. */
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| 84 | # define CLONE(Src) CCLONE (Src, 1)
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| 85 |
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| 86 |
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| 87 | #endif /* !XALLOC_H_ */
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