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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [libiberty/] [xmalloc.c] - Blame information for rev 304

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1 274 jeremybenn
/* memory allocation routines with error checking.
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   Copyright 1989, 90, 91, 92, 93, 94 Free Software Foundation, Inc.
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB.  If
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not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA.  */
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/*
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@deftypefn Replacement void* xmalloc (size_t)
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Allocate memory without fail.  If @code{malloc} fails, this will print
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a message to @code{stderr} (using the name set by
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@code{xmalloc_set_program_name},
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if any) and then call @code{xexit}.  Note that it is therefore safe for
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a program to contain @code{#define malloc xmalloc} in its source.
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@end deftypefn
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@deftypefn Replacement void* xrealloc (void *@var{ptr}, size_t @var{size})
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Reallocate memory without fail.  This routine functions like @code{realloc},
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but will behave the same as @code{xmalloc} if memory cannot be found.
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@end deftypefn
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@deftypefn Replacement void* xcalloc (size_t @var{nelem}, size_t @var{elsize})
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Allocate memory without fail, and set it to zero.  This routine functions
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like @code{calloc}, but will behave the same as @code{xmalloc} if memory
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cannot be found.
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@end deftypefn
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@deftypefn Replacement void xmalloc_set_program_name (const char *@var{name})
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You can use this to set the name of the program used by
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@code{xmalloc_failed} when printing a failure message.
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@end deftypefn
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@deftypefn Replacement void xmalloc_failed (size_t)
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This function is not meant to be called by client code, and is listed
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here for completeness only.  If any of the allocation routines fail, this
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function will be called to print an error message and terminate execution.
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@end deftypefn
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "ansidecl.h"
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#include "libiberty.h"
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#include <stdio.h>
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#include <stddef.h>
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#if VMS
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#include <stdlib.h>
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#include <unixlib.h>
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#else
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/* For systems with larger pointers than ints, these must be declared.  */
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#  if HAVE_STDLIB_H && HAVE_UNISTD_H && HAVE_DECL_MALLOC \
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      && HAVE_DECL_REALLOC && HAVE_DECL_CALLOC && HAVE_DECL_SBRK
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#    include <stdlib.h>
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#    include <unistd.h>
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#  else
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#    ifdef __cplusplus
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extern "C" {
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#    endif /* __cplusplus */
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void *malloc (size_t);
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void *realloc (void *, size_t);
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void *calloc (size_t, size_t);
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void *sbrk (ptrdiff_t);
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#    ifdef __cplusplus
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}
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#    endif /* __cplusplus */
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#  endif /* HAVE_STDLIB_H ...  */
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#endif /* VMS */
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/* The program name if set.  */
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static const char *name = "";
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#ifdef HAVE_SBRK
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/* The initial sbrk, set when the program name is set. Not used for win32
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   ports other than cygwin32.  */
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static char *first_break = NULL;
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#endif /* HAVE_SBRK */
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void
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xmalloc_set_program_name (const char *s)
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{
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  name = s;
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#ifdef HAVE_SBRK
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  /* Win32 ports other than cygwin32 don't have brk() */
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  if (first_break == NULL)
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    first_break = (char *) sbrk (0);
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#endif /* HAVE_SBRK */
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}
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void
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xmalloc_failed (size_t size)
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{
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#ifdef HAVE_SBRK
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  extern char **environ;
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  size_t allocated;
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  if (first_break != NULL)
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    allocated = (char *) sbrk (0) - first_break;
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  else
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    allocated = (char *) sbrk (0) - (char *) &environ;
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  fprintf (stderr,
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           "\n%s%sout of memory allocating %lu bytes after a total of %lu bytes\n",
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           name, *name ? ": " : "",
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           (unsigned long) size, (unsigned long) allocated);
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#else /* HAVE_SBRK */
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  fprintf (stderr,
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           "\n%s%sout of memory allocating %lu bytes\n",
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           name, *name ? ": " : "",
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           (unsigned long) size);
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#endif /* HAVE_SBRK */
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  xexit (1);
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}
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PTR
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xmalloc (size_t size)
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{
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  PTR newmem;
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  if (size == 0)
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    size = 1;
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  newmem = malloc (size);
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  if (!newmem)
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    xmalloc_failed (size);
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  return (newmem);
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}
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PTR
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xcalloc (size_t nelem, size_t elsize)
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{
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  PTR newmem;
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  if (nelem == 0 || elsize == 0)
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    nelem = elsize = 1;
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  newmem = calloc (nelem, elsize);
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  if (!newmem)
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    xmalloc_failed (nelem * elsize);
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  return (newmem);
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}
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PTR
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xrealloc (PTR oldmem, size_t size)
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{
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  PTR newmem;
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  if (size == 0)
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    size = 1;
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  if (!oldmem)
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    newmem = malloc (size);
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  else
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    newmem = realloc (oldmem, size);
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  if (!newmem)
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    xmalloc_failed (size);
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  return (newmem);
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}

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