williamr@4: /*
williamr@4:  *
williamr@4:  * Copyright (c) 1996,1997
williamr@4:  * Silicon Graphics Computer Systems, Inc.
williamr@4:  *
williamr@4:  * Copyright (c) 1997
williamr@4:  * Moscow Center for SPARC Technology
williamr@4:  *
williamr@4:  * Copyright (c) 1999
williamr@4:  * Boris Fomitchev
williamr@4:  *
williamr@4:  * This material is provided "as is", with absolutely no warranty expressed
williamr@4:  * or implied. Any use is at your own risk.
williamr@4:  *
williamr@4:  * Permission to use or copy this software for any purpose is hereby granted
williamr@4:  * without fee, provided the above notices are retained on all copies.
williamr@4:  * Permission to modify the code and to distribute modified code is granted,
williamr@4:  * provided the above notices are retained, and a notice that the code was
williamr@4:  * modified is included with the above copyright notice.
williamr@4:  *
williamr@4:  */
williamr@4: #ifndef _STLP_ALLOC_C
williamr@4: #define _STLP_ALLOC_C
williamr@4: 
williamr@4: #ifndef _STLP_INTERNAL_ALLOC_H
williamr@4: #  include <stl/_alloc.h>
williamr@4: #endif
williamr@4: 
williamr@4: #if defined (__WATCOMC__)
williamr@4: #  pragma warning 13 9
williamr@4: #  pragma warning 367 9
williamr@4: #  pragma warning 368 9
williamr@4: #endif
williamr@4: 
williamr@4: _STLP_BEGIN_NAMESPACE
williamr@4: 
williamr@4: template <class _Alloc>
williamr@4: void * _STLP_CALL __debug_alloc<_Alloc>::allocate(size_t __n) {
williamr@4:   size_t __total_extra = __extra_before_chunk() + __extra_after_chunk();
williamr@4:   size_t __real_n = __n + __total_extra;
williamr@4:   if (__real_n < __n) {
williamr@4:     //It means that we rolled on size_t, __n must be very large, lets hope
williamr@4:     //that allocating it will raised a bad_alloc exception:
williamr@4:     __real_n = __n + (__total_extra - __real_n - 1);
williamr@4:   }
williamr@4:   __alloc_header *__result = (__alloc_header *)__allocator_type::allocate(__real_n);
williamr@4:   memset((char*)__result, __shred_byte, __real_n * sizeof(value_type));
williamr@4:   __result->__magic = __magic;
williamr@4:   __result->__type_size = sizeof(value_type);
williamr@4:   __result->_M_size = (_STLP_UINT32_T)__n;
williamr@4:   return ((char*)__result) + (long)__extra_before;
williamr@4: }
williamr@4: 
williamr@4: template <class _Alloc>
williamr@4: void  _STLP_CALL
williamr@4: __debug_alloc<_Alloc>::deallocate(void *__p, size_t __n) {
williamr@4:   __alloc_header * __real_p = (__alloc_header*)((char *)__p -(long)__extra_before);
williamr@4:   // check integrity
williamr@4:   _STLP_VERBOSE_ASSERT(__real_p->__magic != __deleted_magic, _StlMsg_DBA_DELETED_TWICE)
williamr@4:   _STLP_VERBOSE_ASSERT(__real_p->__magic == __magic, _StlMsg_DBA_NEVER_ALLOCATED)
williamr@4:   _STLP_VERBOSE_ASSERT(__real_p->__type_size == 1,_StlMsg_DBA_TYPE_MISMATCH)
williamr@4:   _STLP_VERBOSE_ASSERT(__real_p->_M_size == __n, _StlMsg_DBA_SIZE_MISMATCH)
williamr@4:   // check pads on both sides
williamr@4:   unsigned char* __tmp;
williamr@4:   for (__tmp = (unsigned char*)(__real_p + 1); __tmp < (unsigned char*)__p; ++__tmp) {
williamr@4:     _STLP_VERBOSE_ASSERT(*__tmp == __shred_byte, _StlMsg_DBA_UNDERRUN)
williamr@4:   }
williamr@4: 
williamr@4:   size_t __real_n = __n + __extra_before_chunk() + __extra_after_chunk();
williamr@4: 
williamr@4:   for (__tmp= ((unsigned char*)__p) + __n * sizeof(value_type);
williamr@4:        __tmp < ((unsigned char*)__real_p) + __real_n ; ++__tmp) {
williamr@4:     _STLP_VERBOSE_ASSERT(*__tmp == __shred_byte, _StlMsg_DBA_OVERRUN)
williamr@4:   }
williamr@4: 
williamr@4:   // that may be unfortunate, just in case
williamr@4:   __real_p->__magic = __deleted_magic;
williamr@4:   memset((char*)__p, __shred_byte, __n * sizeof(value_type));
williamr@4:   __allocator_type::deallocate(__real_p, __real_n);
williamr@4: }
williamr@4: 
williamr@4: _STLP_END_NAMESPACE
williamr@4: 
williamr@4: #endif /*  _STLP_ALLOC_C */
williamr@4: 
williamr@4: // Local Variables:
williamr@4: // mode:C++
williamr@4: // End: