/*

 *

 * Copyright (c) 1996,1997

 * Silicon Graphics Computer Systems, Inc.

 *

 * Copyright (c) 1997

 * Moscow Center for SPARC Technology

 *

 * Copyright (c) 1999

 * Boris Fomitchev

 *

 * This material is provided "as is", with absolutely no warranty expressed

 * or implied. Any use is at your own risk.

 *

 * Permission to use or copy this software for any purpose is hereby granted

 * without fee, provided the above notices are retained on all copies.

 * Permission to modify the code and to distribute modified code is granted,

 * provided the above notices are retained, and a notice that the code was

 * modified is included with the above copyright notice.

 *

 */

#ifndef _STLP_ALLOC_C

#define _STLP_ALLOC_C

#ifndef _STLP_INTERNAL_ALLOC_H

#  include <stl/_alloc.h>

#endif

#if defined (__WATCOMC__)

#  pragma warning 13 9

#  pragma warning 367 9

#  pragma warning 368 9

#endif

_STLP_BEGIN_NAMESPACE

template <class _Alloc>

void * _STLP_CALL __debug_alloc<_Alloc>::allocate(size_t __n) {

  size_t __total_extra = __extra_before_chunk() + __extra_after_chunk();

  size_t __real_n = __n + __total_extra;

  if (__real_n < __n) {

    //It means that we rolled on size_t, __n must be very large, lets hope

    //that allocating it will raised a bad_alloc exception:

    __real_n = __n + (__total_extra - __real_n - 1);

  }

  __alloc_header *__result = (__alloc_header *)__allocator_type::allocate(__real_n);

  memset((char*)__result, __shred_byte, __real_n * sizeof(value_type));

  __result->__magic = __magic;

  __result->__type_size = sizeof(value_type);

  __result->_M_size = (_STLP_UINT32_T)__n;

  return ((char*)__result) + (long)__extra_before;

}

template <class _Alloc>

void  _STLP_CALL

__debug_alloc<_Alloc>::deallocate(void *__p, size_t __n) {

  __alloc_header * __real_p = (__alloc_header*)((char *)__p -(long)__extra_before);

  // check integrity

  _STLP_VERBOSE_ASSERT(__real_p->__magic != __deleted_magic, _StlMsg_DBA_DELETED_TWICE)

  _STLP_VERBOSE_ASSERT(__real_p->__magic == __magic, _StlMsg_DBA_NEVER_ALLOCATED)

  _STLP_VERBOSE_ASSERT(__real_p->__type_size == 1,_StlMsg_DBA_TYPE_MISMATCH)

  _STLP_VERBOSE_ASSERT(__real_p->_M_size == __n, _StlMsg_DBA_SIZE_MISMATCH)

  // check pads on both sides

  unsigned char* __tmp;

  for (__tmp = (unsigned char*)(__real_p + 1); __tmp < (unsigned char*)__p; ++__tmp) {

    _STLP_VERBOSE_ASSERT(*__tmp == __shred_byte, _StlMsg_DBA_UNDERRUN)

  }

  size_t __real_n = __n + __extra_before_chunk() + __extra_after_chunk();

  for (__tmp= ((unsigned char*)__p) + __n * sizeof(value_type);

       __tmp < ((unsigned char*)__real_p) + __real_n ; ++__tmp) {

    _STLP_VERBOSE_ASSERT(*__tmp == __shred_byte, _StlMsg_DBA_OVERRUN)

  }

  // that may be unfortunate, just in case

  __real_p->__magic = __deleted_magic;

  memset((char*)__p, __shred_byte, __n * sizeof(value_type));

  __allocator_type::deallocate(__real_p, __real_n);

}

_STLP_END_NAMESPACE

#endif /*  _STLP_ALLOC_C */

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