~drizzle-trunk/drizzle/development

/* Copyright (C) 2000 MySQL AB

   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; version 2 of the License.

   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, write to the Free Software

   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#include <stdlib.h>

#include "mysys_priv.h"

#include "mysys_err.h"

	/* My memory re allocator */

/**

   @brief wrapper around realloc()

   @param  oldpoint        pointer to currently allocated area

   @param  size            new size requested, must be >0

   @param  my_flags        flags

   @note if size==0 realloc() may return NULL; my_realloc() treats this as an

   error which is not the intention of realloc()

*/

void* my_realloc(void* oldpoint, size_t size, myf my_flags)

{

  void *point;

  assert(size > 0);

  if (!oldpoint && (my_flags & MY_ALLOW_ZERO_PTR))

    return(my_malloc(size,my_flags));

#ifdef USE_HALLOC

  if (!(point = malloc(size)))

  {

    if (my_flags & MY_FREE_ON_ERROR)

      free(oldpoint);

    if (my_flags & MY_HOLD_ON_ERROR)

      return(oldpoint);

    my_errno=errno;

    if (my_flags & MY_FAE+MY_WME)

      my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG),size);

  }

  else

  {

    memcpy(point,oldpoint,size);

    free(oldpoint);

  }

#else

  if ((point= (unsigned char*) realloc(oldpoint,size)) == NULL)

  {

    if (my_flags & MY_FREE_ON_ERROR)

      free(oldpoint);

    if (my_flags & MY_HOLD_ON_ERROR)

      return(oldpoint);

    my_errno=errno;

    if (my_flags & (MY_FAE+MY_WME))

      my_error(EE_OUTOFMEMORY, MYF(ME_BELL+ME_WAITTANG), size);

  }

#endif

  return(point);

} /* my_realloc */