malloc/alloc_buffer_allocate.c

   1 /* Allocate a fixed-size allocation buffer using malloc.
   2    Copyright (C) 2017-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <alloc_buffer.h>
  20
  21 #include <stdlib.h>
  22
  23 struct alloc_buffer
  24 __libc_alloc_buffer_allocate (size_t size, void **pptr)
  25 {
  26   *pptr = malloc (size);
  27   if (*pptr == NULL)
  28     return (struct alloc_buffer)
  29       {
  30         .__alloc_buffer_current = __ALLOC_BUFFER_INVALID_POINTER,
  31         .__alloc_buffer_end = __ALLOC_BUFFER_INVALID_POINTER
  32       };
  33   else
  34     return alloc_buffer_create (*pptr, size);
  35 }
  36 libc_hidden_def (__libc_alloc_buffer_allocate)