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