1 _alloc.h

     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 

    23 /* NOTE: This is an internal header file, included by other STL headers.

    24  *   You should not attempt to use it directly.

    25  */

    26 

    27 #ifndef _STLP_INTERNAL_ALLOC_H

    28 #define _STLP_INTERNAL_ALLOC_H

    29 

    30 # ifndef _STLP_CSTDDEF

    31 #  include <cstddef>

    32 # endif

    33 

    34 #if !defined (_STLP_DEBUG_H) && (defined  (_STLP_DEBUG) || defined (_STLP_ASSERTIONS))

    35 # include <stl/debug/_debug.h>

    36 #endif

    37 

    38 # ifndef _STLP_CSTDLIB

    39 #  include <cstdlib>

    40 # endif

    41 # ifndef _STLP_CSTRING

    42 #  include <cstring>

    43 # endif

    44 

    45 # ifndef __THROW_BAD_ALLOC

    46 #  if !defined(_STLP_USE_EXCEPTIONS)

    47 #   if !defined (_STLP_CSTDIO)

    48 #    include <cstdio>

    49 #   endif

    50 #   if !defined (_STLP_CSTDLIB)

    51 #    include <cstdlib>

    52 #   endif

    53 #   define __THROW_BAD_ALLOC puts("out of memory\n"); exit(1)

    54 #  else /* !defined(_STLP_USE_EXCEPTIONS) */

    55 #   define __THROW_BAD_ALLOC throw _STLP_STD::bad_alloc()

    56 #  endif /* !defined(_STLP_USE_EXCEPTIONS) */

    57 # endif   /* __THROW_BAD_ALLOC */

    58 

    59 # ifndef _STLP_INTERNAL_NEW_HEADER

    60 #  include <stl/_new.h>

    61 # endif

    62 

    63 // #if ! defined (__SYMBIAN32__)

    64 #if /* defined (_STLP_THREADS) && */ ! defined (_STLP_INTERNAL_THREADS_H)

    65 # include <stl/_threads.h>

    66 // #endif

    67 #endif

    68 

    69 #ifndef _STLP_INTERNAL_CONSTRUCT_H

    70 # include <stl/_construct.h>

    71 #endif

    72 

    73 #ifndef __ALLOC

    74 #   define __ALLOC __sgi_alloc

    75 #endif

    76 

    77 # ifndef __RESTRICT

    78 #  define __RESTRICT

    79 # endif

    80 

    81 #if defined (_STLP_THREADS) || (defined(_STLP_OWN_IOSTREAMS) && ! defined (_STLP_NO_THREADS) && ! defined (_NOTHREADS) )

    82 # define _STLP_NODE_ALLOCATOR_THREADS true

    83 #else

    84 # define _STLP_NODE_ALLOCATOR_THREADS false

    85 #endif

    86 

    87 _STLP_BEGIN_NAMESPACE

    88 

    89 # if defined (_STLP_USE_RAW_SGI_ALLOCATORS)

    90 template <class _Tp, class _Alloc> struct __allocator;

    91 # endif

    92 

    93 #ifndef _STLP_NO_NODE_ALLOC

    94 

    95 // Malloc-based allocator.  Typically slower than default alloc below.

    96 // Typically thread-safe and more storage efficient.

    97 

    98 typedef void (* __oom_handler_type)();

    99 

   100 template <int __inst>

   101 class __malloc_alloc {

   102 private:

   103   static void* _STLP_CALL _S_oom_malloc(size_t);

   104   static __oom_handler_type __oom_handler;

   105 public:

   106   // this one is needed for proper simple_alloc wrapping

   107   typedef char value_type;

   108 # if defined (_STLP_MEMBER_TEMPLATE_CLASSES) && defined (_STLP_USE_RAW_SGI_ALLOCATORS)

   109   template <class _Tp1> struct rebind {

   110     typedef __allocator<_Tp1, __malloc_alloc<__inst> > other;

   111   };

   112 # endif

   113   static void* _STLP_CALL allocate(size_t __n)    {

   114     void* __result = malloc(__n);

   115     if (0 == __result) __result = _S_oom_malloc(__n);

   116     return __result;

   117   }

   118   static void _STLP_CALL deallocate(void* __p, size_t /* __n */) { free((char*)__p); }

   119   static __oom_handler_type _STLP_CALL set_malloc_handler(__oom_handler_type __f) {

   120     __oom_handler_type __old = __oom_handler;

   121     __oom_handler = __f;

   122     return(__old);

   123   }

   124 };

   125 

   126 # endif

   127 

   128 // New-based allocator.  Typically slower than default alloc below.

   129 // Typically thread-safe and more storage efficient.

   130 class _STLP_CLASS_DECLSPEC __new_alloc {

   131 public:

   132   // this one is needed for proper simple_alloc wrapping

   133   typedef char value_type;

   134 # if defined (_STLP_MEMBER_TEMPLATE_CLASSES) &&  defined(_STLP_USE_RAW_SGI_ALLOCATORS)

   135   template <class _Tp1> struct rebind {

   136     typedef __allocator<_Tp1, __new_alloc > other;

   137   };

   138 # endif

   139   static void* _STLP_CALL  allocate(size_t __n) {  

   140     return __stl_new(__n); 

   141   }

   142   static void _STLP_CALL deallocate(void* __p, size_t) { __stl_delete(__p); }

   143 };

   144 

   145 

   146 // Allocator adaptor to check size arguments for debugging.

   147 // Reports errors using assert.  Checking can be disabled with

   148 // NDEBUG, but it's far better to just use the underlying allocator

   149 // instead when no checking is desired.

   150 // There is some evidence that this can confuse Purify.

   151 // This adaptor can only be applied to raw allocators

   152 

   153 template <class _Alloc>

   154 class __debug_alloc : public _Alloc {

   155 public:

   156   typedef _Alloc __allocator_type;

   157   typedef typename _Alloc::value_type value_type;

   158 private:

   159   struct __alloc_header {

   160     size_t __magic: 16;

   161     size_t __type_size:16;

   162     _STLP_UINT32_T _M_size;

   163   }; // that is 8 bytes for sure

   164   // Sunpro CC has bug on enums, so extra_before/after set explicitly

   165   enum { __pad=8, __magic=0xdeba, __deleted_magic = 0xdebd,

   166 	 __shred_byte= _STLP_SHRED_BYTE

   167   };

   168 

   169   enum { __extra_before = 16, __extra_after = 8 };

   170   // Size of space used to store size.  Note

   171   // that this must be large enough to preserve

   172   // alignment.

   173   static size_t _STLP_CALL __extra_before_chunk() {

   174     return (long)__extra_before/sizeof(value_type)+

   175       (size_t)((long)__extra_before%sizeof(value_type)>0);

   176   }

   177   static size_t _STLP_CALL __extra_after_chunk() {

   178     return (long)__extra_after/sizeof(value_type)+

   179       (size_t)((long)__extra_after%sizeof(value_type)>0);

   180   }

   181 public:

   182 # if defined (_STLP_MEMBER_TEMPLATE_CLASSES) && defined (_STLP_USE_RAW_SGI_ALLOCATORS)

   183   template <class _Tp1> struct rebind {

   184     typedef __allocator< _Tp1, __debug_alloc<_Alloc> > other;

   185   };

   186 # endif

   187   __debug_alloc() {}

   188   ~__debug_alloc() {}

   189   static void * _STLP_CALL allocate(size_t);

   190   static void _STLP_CALL deallocate(void *, size_t);

   191 };

   192 

   193 # if defined(__OS400__)

   194 enum {_ALIGN = 16, _ALIGN_SHIFT=4, _MAX_BYTES = 256};

   195 #  define  _STLP_NFREELISTS 16

   196 # else

   197 enum {_ALIGN = 8, _ALIGN_SHIFT=3, _MAX_BYTES = 128};

   198 #  define  _STLP_NFREELISTS 16

   199 # endif /* __OS400__ */

   200 

   201 #ifndef _STLP_NO_NODE_ALLOC

   202 

   203 // Default node allocator.

   204 // With a reasonable compiler, this should be roughly as fast as the

   205 // original STL class-specific allocators, but with less fragmentation.

   206 // Default_alloc_template parameters are experimental and MAY

   207 // DISAPPEAR in the future.  Clients should just use alloc for now.

   208 //

   209 // Important implementation properties:

   210 // 1. If the client request an object of size > _MAX_BYTES, the resulting

   211 //    object will be obtained directly from malloc.

   212 // 2. In all other cases, we allocate an object of size exactly

   213 //    _S_round_up(requested_size).  Thus the client has enough size

   214 //    information that we can return the object to the proper free list

   215 //    without permanently losing part of the object.

   216 //

   217 

   218 // The first template parameter specifies whether more than one thread

   219 // may use this allocator.  It is safe to allocate an object from

   220 // one instance of a default_alloc and deallocate it with another

   221 // one.  This effectively transfers its ownership to the second one.

   222 // This may have undesirable effects on reference locality.

   223 // The second parameter is unreferenced and serves only to allow the

   224 // creation of multiple default_alloc instances.

   225 

   226 class _STLP_CLASS_DECLSPEC _Node_alloc_obj {

   227 public:

   228     _Node_alloc_obj * _M_free_list_link;

   229 };

   230 

   231 template <bool __threads, int __inst>

   232 class __node_alloc {

   233   _STLP_PRIVATE:

   234   static inline size_t _STLP_CALL _S_round_up(size_t __bytes) { return (((__bytes) + (size_t)_ALIGN-1) & ~((size_t)_ALIGN - 1)); }

   235   typedef _Node_alloc_obj _Obj;

   236 private:

   237   // Returns an object of size __n, and optionally adds to size __n free list.

   238   static void*  _STLP_CALL _S_refill(size_t __n);

   239   // Allocates a chunk for nobjs of size size.  nobjs may be reduced

   240   // if it is inconvenient to allocate the requested number.

   241   static char*  _STLP_CALL _S_chunk_alloc(size_t __p_size, int& __nobjs);

   242   // Chunk allocation state.

   243   static _Node_alloc_obj * _STLP_VOLATILE _S_free_list[_STLP_NFREELISTS]; 

   244   static char* _S_start_free;

   245   static char* _S_end_free;

   246   static size_t _S_heap_size;

   247   static void * _STLP_CALL _M_allocate(size_t __n);

   248   /* __p may not be 0 */

   249   static void _STLP_CALL _M_deallocate(void *__p, size_t __n);

   250 public:

   251   // this one is needed for proper simple_alloc wrapping

   252   typedef char value_type;

   253 # if defined (_STLP_MEMBER_TEMPLATE_CLASSES) && defined (_STLP_USE_RAW_SGI_ALLOCATORS)

   254   template <class _Tp1> struct rebind {

   255     typedef __allocator<_Tp1, __node_alloc<__threads, __inst> > other;

   256   };

   257 # endif

   258   /* __n must be > 0      */

   259   static void * _STLP_CALL allocate(size_t __n) { 

   260 return (__n > (size_t)_MAX_BYTES) ?  __stl_new(__n) : _M_allocate(__n); }

   261   /* __p may not be 0 */

   262   static void _STLP_CALL deallocate(void *__p, size_t __n) { 

   263 if (__n > (size_t)_MAX_BYTES) __stl_delete(__p); else _M_deallocate(__p, __n); }

   264 };

   265 

   266 # if defined (_STLP_USE_TEMPLATE_EXPORT)

   267 _STLP_EXPORT_TEMPLATE_CLASS __malloc_alloc<0>;

   268 _STLP_EXPORT_TEMPLATE_CLASS __node_alloc<_STLP_NODE_ALLOCATOR_THREADS, 0>;

   269 # endif /* _STLP_USE_TEMPLATE_EXPORT */

   270 typedef __node_alloc<_STLP_NODE_ALLOCATOR_THREADS, 0> _Node_alloc;

   271 # if defined (_STLP_USE_TEMPLATE_EXPORT)

   272 _STLP_EXPORT_TEMPLATE_CLASS __debug_alloc<_Node_alloc>;

   273 _STLP_EXPORT_TEMPLATE_CLASS __debug_alloc<__new_alloc>;

   274 _STLP_EXPORT_TEMPLATE_CLASS __debug_alloc<__malloc_alloc<0> >;

   275 # endif

   276 

   277 #endif

   278 

   279 # if defined (_STLP_USE_PERTHREAD_ALLOC)

   280 

   281 _STLP_END_NAMESPACE

   282 // include additional header here

   283 # include <stl/_pthread_alloc.h>

   284 _STLP_BEGIN_NAMESPACE

   285 

   286 #  if defined ( _STLP_DEBUG_ALLOC )

   287 typedef __debug_alloc<__pthread_alloc> __sgi_alloc;

   288 #  else

   289 typedef __pthread_alloc __sgi_alloc;

   290 #  endif /* _STLP_DEBUG_ALLOC */

   291 

   292 typedef __pthread_alloc __single_client_alloc;

   293 typedef __pthread_alloc __multithreaded_alloc;

   294 

   295 # else

   296 

   297 # if defined ( _STLP_USE_NEWALLOC )

   298 

   299 #  if defined ( _STLP_DEBUG_ALLOC )

   300 typedef __debug_alloc<__new_alloc> __sgi_alloc;

   301 #  else

   302 typedef __new_alloc __sgi_alloc;

   303 #  endif /* _STLP_DEBUG_ALLOC */

   304 

   305 typedef __new_alloc __single_client_alloc;

   306 typedef __new_alloc __multithreaded_alloc;

   307 

   308 #  elif defined (_STLP_USE_MALLOC)

   309 

   310 #   if defined ( _STLP_DEBUG_ALLOC )

   311 typedef __debug_alloc<__malloc_alloc<0> > __sgi_alloc;

   312 #   else

   313 typedef __malloc_alloc<0> __sgi_alloc;

   314 #   endif /* _STLP_DEBUG_ALLOC */

   315 

   316 typedef __malloc_alloc<0> __single_client_alloc;

   317 typedef __malloc_alloc<0> __multithreaded_alloc;

   318 

   319 # else

   320 

   321 #   if defined ( _STLP_DEBUG_ALLOC )

   322 typedef __debug_alloc<_Node_alloc> __sgi_alloc;

   323 #   else

   324 typedef _Node_alloc __sgi_alloc;

   325 #   endif

   326 

   327 typedef __node_alloc<false, 0> __single_client_alloc;

   328 typedef __node_alloc<true, 0>  __multithreaded_alloc;

   329 

   330 #  endif /* _STLP_USE_NEWALLOC */

   331 # endif /* PTHREAD_ALLOC */

   332 

   333 // This implements allocators as specified in the C++ standard.  

   334 //

   335 // Note that standard-conforming allocators use many language features

   336 // that are not yet widely implemented.  In particular, they rely on

   337 // member templates, partial specialization, partial ordering of function

   338 // templates, the typename keyword, and the use of the template keyword

   339 // to refer to a template member of a dependent type.

   340 

   341 template <class _Tp>

   342 class allocator {

   343 public:

   344 

   345   typedef _Tp        value_type;

   346   typedef value_type *       pointer;

   347   typedef const _Tp* const_pointer;

   348   typedef _Tp&       reference;

   349   typedef const _Tp& const_reference;

   350   typedef size_t     size_type;

   351   typedef ptrdiff_t  difference_type;

   352 # if defined (_STLP_MEMBER_TEMPLATE_CLASSES)

   353   template <class _Tp1> struct rebind {

   354     typedef allocator<_Tp1> other;

   355   };

   356 # endif

   357   allocator() _STLP_NOTHROW {}

   358  # if defined (_STLP_MEMBER_TEMPLATES)

   359   template <class _Tp1> allocator(const allocator<_Tp1>&) _STLP_NOTHROW {}

   360  # endif    

   361   allocator(const allocator<_Tp>&) _STLP_NOTHROW {}

   362   ~allocator() _STLP_NOTHROW {}

   363   pointer address(reference __x) const { return &__x; }

   364   const_pointer address(const_reference __x) const { return &__x; }

   365   // __n is permitted to be 0.  The C++ standard says nothing about what the return value is when __n == 0.

   366   _Tp* allocate(size_type __n, const void* = 0) { 

   367     return __n != 0 ? __REINTERPRET_CAST(value_type*,__sgi_alloc::allocate(__n * sizeof(value_type))) : 0;

   368   }

   369   // __p is permitted to be a null pointer, only if n==0.

   370   void deallocate(pointer __p, size_type __n) {

   371     _STLP_ASSERT( (__p == 0) == (__n == 0) )

   372       if (__p != 0) __sgi_alloc::deallocate((void*)__p, __n * sizeof(value_type));

   373   }

   374   // backwards compatibility

   375   void deallocate(pointer __p) const {  if (__p != 0) __sgi_alloc::deallocate((void*)__p, sizeof(value_type)); }

   376   size_type max_size() const _STLP_NOTHROW  { return size_t(-1) / sizeof(value_type); }

   377   void construct(pointer __p, const _Tp& __val) { _STLP_STD::_Construct(__p, __val); }

   378   void destroy(pointer __p) { _STLP_STD::_Destroy(__p); }

   379 # if defined(__MRC__)||(defined(__SC__) && !defined(__DMC__))

   380   template <class _T2> bool operator==(const allocator<_T2>&) const  _STLP_NOTHROW { return true; }

   381   template <class _T2> bool operator!=(const allocator<_T2>&) const _STLP_NOTHROW { return false; }

   382 # endif

   383 };

   384 

   385 _STLP_TEMPLATE_NULL

   386 class _STLP_CLASS_DECLSPEC allocator<void> {

   387 public:

   388   typedef size_t      size_type;

   389   typedef ptrdiff_t   difference_type;

   390   typedef void*       pointer;

   391   typedef const void* const_pointer;

   392 # if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)

   393   typedef void        value_type;

   394 # endif

   395 # if defined (_STLP_MEMBER_TEMPLATE_CLASSES)

   396   template <class _Tp1> struct rebind {

   397     typedef allocator<_Tp1> other;

   398   };

   399 # endif

   400 # if defined(__MRC__)||(defined(__SC__)&&!defined(__DMC__))		//*ty 03/24/2001 - MPW compilers get confused on these operator definitions

   401   template <class _T2> bool operator==(const allocator<_T2>&) const _STLP_NOTHROW { return true; }

   402   template <class _T2> bool operator!=(const allocator<_T2>&) const _STLP_NOTHROW { return false; }

   403 # endif

   404 };

   405 

   406 #if !(defined(__MRC__)||(defined(__SC__)&&!defined(__DMC__)))		//*ty 03/24/2001 - MPW compilers get confused on these operator definitions

   407 template <class _T1, class _T2> inline bool  _STLP_CALL operator==(const allocator<_T1>&, const allocator<_T2>&) _STLP_NOTHROW { return true; }

   408 template <class _T1, class _T2> inline bool  _STLP_CALL operator!=(const allocator<_T1>&, const allocator<_T2>&) _STLP_NOTHROW { return false; }

   409 #endif

   410 

   411 # if defined (_STLP_USE_TEMPLATE_EXPORT)

   412 _STLP_EXPORT_TEMPLATE_CLASS allocator<char>;

   413 #  if defined (_STLP_HAS_WCHAR_T)

   414 _STLP_EXPORT_TEMPLATE_CLASS allocator<wchar_t>;

   415 #  endif

   416 # endif /* _STLP_USE_TEMPLATE_EXPORT */

   417 

   418 // Another allocator adaptor: _Alloc_traits.  This serves two

   419 // purposes.  First, make it possible to write containers that can use

   420 // either SGI-style allocators or standard-conforming allocator.

   421 

   422 // The fully general version.

   423 template <class _Tp, class _Allocator>

   424 struct _Alloc_traits

   425 {

   426   typedef _Allocator _Orig;

   427 # if defined (_STLP_USE_NESTED_TCLASS_THROUGHT_TPARAM) 

   428   typedef typename _Allocator::_STLP_TEMPLATE rebind<_Tp> _Rebind_type;

   429   typedef typename _Rebind_type::other  allocator_type;

   430   static allocator_type create_allocator(const _Orig& __a) { return allocator_type(__a); }

   431 # else

   432   // this is not actually true, used only to pass this type through

   433   // to dynamic overload selection in _STLP_alloc_proxy methods

   434   typedef _Allocator allocator_type;

   435 # endif /* _STLP_USE_NESTED_TCLASS_THROUGHT_TPARAM */

   436 };

   437 

   438 #ifndef _STLP_FORCE_ALLOCATORS

   439 #define _STLP_FORCE_ALLOCATORS(a,y) 

   440 #endif

   441 

   442 #if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) && ! defined (_STLP_MEMBER_TEMPLATE_CLASSES)

   443 // The version for the default allocator, for rare occasion when we have partial spec w/o member template classes

   444 template <class _Tp, class _Tp1>

   445 struct _Alloc_traits<_Tp, allocator<_Tp1> > {

   446   typedef allocator<_Tp1> _Orig;

   447   typedef allocator<_Tp> allocator_type;

   448   static allocator_type create_allocator(const allocator<_Tp1 >& __a) { return allocator_type(__a); }

   449 };

   450 #endif /* _STLP_CLASS_PARTIAL_SPECIALIZATION */

   451 

   452 /* macro to convert the allocator for initialization

   453  * not using MEMBER_TEMPLATE_CLASSES as it should work given template constructor  */

   454 #if defined (_STLP_MEMBER_TEMPLATES) || ! defined (_STLP_CLASS_PARTIAL_SPECIALIZATION)

   455 /* if _STLP_NO_TEMPLATE_CONVERSIONS is set, the member template constructor is

   456  * not used implicitly to convert allocator parameter, so let us do it explicitly */

   457 # if defined (_STLP_MEMBER_TEMPLATE_CLASSES) && defined (_STLP_NO_TEMPLATE_CONVERSIONS)

   458 #  define _STLP_CONVERT_ALLOCATOR(__a, _Tp) __stl_alloc_create(__a,(_Tp*)0)

   459 # else

   460 #  define _STLP_CONVERT_ALLOCATOR(__a, _Tp) __a

   461 # endif

   462 /* else convert, but only if partial specialization works, since else

   463  * Container::allocator_type won't be different */

   464 #else 

   465 #  define _STLP_CONVERT_ALLOCATOR(__a, _Tp) __stl_alloc_create(__a,(_Tp*)0)

   466 #endif

   467 

   468 # if defined (_STLP_USE_NESTED_TCLASS_THROUGHT_TPARAM) 

   469 template <class _Tp, class _Alloc>

   470 inline _STLP_TYPENAME_ON_RETURN_TYPE _Alloc_traits<_Tp, _Alloc>::allocator_type  _STLP_CALL

   471 __stl_alloc_create(const _Alloc& __a, const _Tp*) {

   472   typedef typename _Alloc::_STLP_TEMPLATE rebind<_Tp>::other _Rebound_type;

   473   return _Rebound_type(__a);

   474 }

   475 #else

   476 // If custom allocators are being used without member template classes support :

   477 // user (on purpose) is forced to define rebind/get operations !!!

   478 template <class _Tp1, class _Tp2>

   479 inline allocator<_Tp2>& _STLP_CALL

   480 __stl_alloc_rebind(allocator<_Tp1>& __a, const _Tp2*) {  return (allocator<_Tp2>&)(__a); }

   481 template <class _Tp1, class _Tp2>

   482 inline allocator<_Tp2> _STLP_CALL

   483 __stl_alloc_create(const allocator<_Tp1>&, const _Tp2*) { return allocator<_Tp2>(); }

   484 #endif /* _STLP_USE_NESTED_TCLASS_THROUGHT_TPARAM */

   485 

   486 # ifdef _STLP_USE_RAW_SGI_ALLOCATORS

   487 // move obsolete stuff out of the way

   488 # include <stl/_alloc_old.h>

   489 # endif

   490 

   491 // inheritance is being used for EBO optimization

   492 template <class _Value, class _Tp, class _MaybeReboundAlloc>

   493 class _STLP_alloc_proxy : public _MaybeReboundAlloc {

   494 private:

   495   typedef _MaybeReboundAlloc _Base;

   496   typedef _STLP_alloc_proxy<_Value, _Tp, _MaybeReboundAlloc> _Self;

   497 public:

   498   _Value _M_data;

   499   inline _STLP_alloc_proxy(const _MaybeReboundAlloc& __a, _Value __p) : _MaybeReboundAlloc(__a), _M_data(__p) {}

   500 

   501 # if 0

   502   inline _STLP_alloc_proxy(const _Self& __x) : _MaybeReboundAlloc(__x), _M_data(__x._M_data) {} 

   503   // construction/destruction

   504   inline _Self& operator = (const _Self& __x) { 

   505     *(_MaybeReboundAlloc*)this = *(_MaybeReboundAlloc*)__x;

   506     _M_data = __x._M_data; return *this; 

   507   } 

   508   inline _Self& operator = (const _Base& __x) { ((_Base&)*this) = __x; return *this; } 

   509 # endif

   510   // Unified interface to perform allocate()/deallocate() with limited

   511   // language support

   512 #if ! defined (_STLP_USE_NESTED_TCLASS_THROUGHT_TPARAM)

   513   // else it is rebound already, and allocate() member is accessible

   514   inline _Tp* allocate(size_t __n) { 

   515     return __stl_alloc_rebind(__STATIC_CAST(_Base&,*this),(_Tp*)0).allocate(__n,0); 

   516   }

   517   inline void deallocate(_Tp* __p, size_t __n) { 

   518     __stl_alloc_rebind(__STATIC_CAST(_Base&, *this),(_Tp*)0).deallocate(__p, __n); 

   519   }

   520 #endif /* !_STLP_USE_NESTED_TCLASS_THROUGHT_TPARAM */

   521 };

   522 

   523 # if defined (_STLP_USE_TEMPLATE_EXPORT)

   524 _STLP_EXPORT_TEMPLATE_CLASS _STLP_alloc_proxy<char *,char,allocator<char> >;

   525 #  if defined (_STLP_HAS_WCHAR_T)

   526 _STLP_EXPORT_TEMPLATE_CLASS _STLP_alloc_proxy<wchar_t *,wchar_t,allocator<wchar_t> >;

   527 #  endif

   528 # endif /* _STLP_USE_TEMPLATE_EXPORT */

   529 

   530 # undef _STLP_NODE_ALLOCATOR_THREADS

   531 

   532 _STLP_END_NAMESPACE

   533 

   534 # if defined (_STLP_EXPOSE_GLOBALS_IMPLEMENTATION) && !defined (_STLP_LINK_TIME_INSTANTIATION)

   535 #  include <stl/_alloc.c>

   536 # endif

   537 

   538 #endif /* _STLP_INTERNAL_ALLOC_H */

   539 

   540 // Local Variables:

   541 // mode:C++

   542 // End:

   543