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/project/jni/stlport/stlport/stl/_alloc.c

https://github.com/aichunyu/FFPlayer
C | 88 lines | 48 code | 11 blank | 29 comment | 9 complexity | 56b7eabe166f99b5eeac4c7895fab916 MD5 | raw file
 1/*
 2 *
 3 * Copyright (c) 1996,1997
 4 * Silicon Graphics Computer Systems, Inc.
 5 *
 6 * Copyright (c) 1997
 7 * Moscow Center for SPARC Technology
 8 *
 9 * Copyright (c) 1999
10 * Boris Fomitchev
11 *
12 * This material is provided "as is", with absolutely no warranty expressed
13 * or implied. Any use is at your own risk.
14 *
15 * Permission to use or copy this software for any purpose is hereby granted
16 * without fee, provided the above notices are retained on all copies.
17 * Permission to modify the code and to distribute modified code is granted,
18 * provided the above notices are retained, and a notice that the code was
19 * modified is included with the above copyright notice.
20 *
21 */
22#ifndef _STLP_ALLOC_C
23#define _STLP_ALLOC_C
24
25#ifndef _STLP_INTERNAL_ALLOC_H
26#  include <stl/_alloc.h>
27#endif
28
29#if defined (__WATCOMC__)
30#  pragma warning 13 9
31#  pragma warning 367 9
32#  pragma warning 368 9
33#endif
34
35_STLP_BEGIN_NAMESPACE
36
37template <class _Alloc>
38void * _STLP_CALL __debug_alloc<_Alloc>::allocate(size_t __n) {
39  size_t __total_extra = __extra_before_chunk() + __extra_after_chunk();
40  size_t __real_n = __n + __total_extra;
41  if (__real_n < __n) {
42    //It means that we rolled on size_t, __n must be very large, lets hope
43    //that allocating it will raised a bad_alloc exception:
44    __real_n = __n + (__total_extra - __real_n - 1);
45  }
46  __alloc_header *__result = (__alloc_header *)__allocator_type::allocate(__real_n);
47  memset((char*)__result, __shred_byte, __real_n * sizeof(value_type));
48  __result->__magic = __magic;
49  __result->__type_size = sizeof(value_type);
50  __result->_M_size = (_STLP_UINT32_T)__n;
51  return ((char*)__result) + (long)__extra_before;
52}
53
54template <class _Alloc>
55void  _STLP_CALL
56__debug_alloc<_Alloc>::deallocate(void *__p, size_t __n) {
57  __alloc_header * __real_p = (__alloc_header*)((char *)__p -(long)__extra_before);
58  // check integrity
59  _STLP_VERBOSE_ASSERT(__real_p->__magic != __deleted_magic, _StlMsg_DBA_DELETED_TWICE)
60  _STLP_VERBOSE_ASSERT(__real_p->__magic == __magic, _StlMsg_DBA_NEVER_ALLOCATED)
61  _STLP_VERBOSE_ASSERT(__real_p->__type_size == 1,_StlMsg_DBA_TYPE_MISMATCH)
62  _STLP_VERBOSE_ASSERT(__real_p->_M_size == __n, _StlMsg_DBA_SIZE_MISMATCH)
63  // check pads on both sides
64  unsigned char* __tmp;
65  for (__tmp = (unsigned char*)(__real_p + 1); __tmp < (unsigned char*)__p; ++__tmp) {
66    _STLP_VERBOSE_ASSERT(*__tmp == __shred_byte, _StlMsg_DBA_UNDERRUN)
67  }
68
69  size_t __real_n = __n + __extra_before_chunk() + __extra_after_chunk();
70
71  for (__tmp= ((unsigned char*)__p) + __n * sizeof(value_type);
72       __tmp < ((unsigned char*)__real_p) + __real_n ; ++__tmp) {
73    _STLP_VERBOSE_ASSERT(*__tmp == __shred_byte, _StlMsg_DBA_OVERRUN)
74  }
75
76  // that may be unfortunate, just in case
77  __real_p->__magic = __deleted_magic;
78  memset((char*)__p, __shred_byte, __n * sizeof(value_type));
79  __allocator_type::deallocate(__real_p, __real_n);
80}
81
82_STLP_END_NAMESPACE
83
84#endif /*  _STLP_ALLOC_C */
85
86// Local Variables:
87// mode:C++
88// End: