kc3-lang/gnulib/lib/safe-alloc.h

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• Hash : 281b825e
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  Date : 2018-01-01T00:57:25
  

  maint: Run 'make update-copyright'
  

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• lib/safe-alloc.h

• /* safe-alloc.h: safer memory allocation
  
     Copyright (C) 2009-2018 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify it
     under the terms of the GNU General Public License as published by the
     Free Software Foundation; either version 3 of the License, or any
     later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  /* Written by Daniel Berrange <berrange@redhat.com>, 2008 */
  
  #ifndef SAFE_ALLOC_H_
  # define SAFE_ALLOC_H_
  
  # include <stdlib.h>
  
  #ifndef __GNUC_PREREQ
  # if defined __GNUC__ && defined __GNUC_MINOR__
  #  define __GNUC_PREREQ(maj, min)                                       \
    ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
  # else
  #  define __GNUC_PREREQ(maj, min) 0
  # endif
  #endif
  
  # ifndef _GL_ATTRIBUTE_RETURN_CHECK
  #  if __GNUC_PREREQ (3, 4)
  #   define _GL_ATTRIBUTE_RETURN_CHECK __attribute__((__warn_unused_result__))
  #  else
  #   define _GL_ATTRIBUTE_RETURN_CHECK
  #  endif
  # endif
  
  /* Don't call these directly - use the macros below */
  int
  safe_alloc_alloc_n (void *ptrptr, size_t size, size_t count, int zeroed)
    _GL_ATTRIBUTE_RETURN_CHECK;
  
  int
  safe_alloc_realloc_n (void *ptrptr, size_t size, size_t count)
    _GL_ATTRIBUTE_RETURN_CHECK;
  
  /**
   * ALLOC:
   * @ptr: pointer to hold address of allocated memory
   *
   * Allocate sizeof(*ptr) bytes of memory and store
   * the address of allocated memory in 'ptr'. Fill the
   * newly allocated memory with zeros.
   *
   * Return -1 on failure to allocate, zero on success
   */
  # define ALLOC(ptr)                                     \
    safe_alloc_alloc_n (&(ptr), sizeof (*(ptr)), 1, 1)
  
  /**
   * ALLOC_N:
   * @ptr: pointer to hold address of allocated memory
   * @count: number of elements to allocate
   *
   * Allocate an array of 'count' elements, each sizeof(*ptr)
   * bytes long and store the address of allocated memory in
   * 'ptr'. Fill the newly allocated memory with zeros.
   *
   * Return -1 on failure, 0 on success
   */
  # define ALLOC_N(ptr, count)                                    \
    safe_alloc_alloc_n (&(ptr), sizeof (*(ptr)), (count), 1)
  
  /**
   * ALLOC_N_UNINITIALIZED:
   * @ptr: pointer to hold address of allocated memory
   * @count: number of elements to allocate
   *
   * Allocate an array of 'count' elements, each sizeof(*ptr)
   * bytes long and store the address of allocated memory in
   * 'ptr'. Do not initialize the new memory at all.
   *
   * Return -1 on failure to allocate, zero on success
   */
  # define ALLOC_N_UNINITIALIZED(ptr, count)                      \
    safe_alloc_alloc_n (&(ptr), sizeof (*(ptr)), (count), 0)
  
  /**
   * REALLOC_N:
   * @ptr: pointer to hold address of allocated memory
   * @count: number of elements to allocate
   *
   * Re-allocate an array of 'count' elements, each sizeof(*ptr)
   * bytes long and store the address of allocated memory in
   * 'ptr'. Fill the newly allocated memory with zeros
   *
   * Return -1 on failure to reallocate, zero on success
   */
  # define REALLOC_N(ptr, count)                                  \
    safe_alloc_realloc_n (&(ptr), sizeof (*(ptr)), (count))
  
  /**
   * FREE:
   * @ptr: pointer holding address to be freed
   *
   * Free the memory stored in 'ptr' and update to point
   * to NULL.
   */
  # define FREE(ptr)                              \
    do                                            \
      {                                           \
        free (ptr);                               \
        (ptr) = NULL;                             \
      }                                           \
    while (0)
  
  #endif /* SAFE_ALLOC_H_ */
  

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