author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 11 Jun 2010 15:26:22 +0300 | |
changeset 34 | 5fae379060a7 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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/* |
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* |
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* Copyright (c) 1994 |
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* Hewlett-Packard Company |
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* |
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* Copyright (c) 1996,1997 |
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* Silicon Graphics Computer Systems, Inc. |
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* |
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* Copyright (c) 1997 |
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* Moscow Center for SPARC Technology |
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* |
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* Copyright (c) 1999 |
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* Boris Fomitchev |
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* |
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* This material is provided "as is", with absolutely no warranty expressed |
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* or implied. Any use is at your own risk. |
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* |
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* Permission to use or copy this software for any purpose is hereby granted |
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* without fee, provided the above notices are retained on all copies. |
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* Permission to modify the code and to distribute modified code is granted, |
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* provided the above notices are retained, and a notice that the code was |
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* modified is included with the above copyright notice. |
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* |
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*/ |
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|
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#ifndef _STLP_PTHREAD_ALLOC_H |
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#define _STLP_PTHREAD_ALLOC_H |
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|
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/* |
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* Pthread-specific node allocator. |
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* This is similar to the default allocator, except that free-list |
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* information is kept separately for each thread, avoiding locking. |
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* This should be reasonably fast even in the presence of threads. |
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* The down side is that storage may not be well-utilized. |
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* It is not an error to allocate memory in thread A and deallocate |
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* it in thread B. But this effectively transfers ownership of the memory, |
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* so that it can only be reallocated by thread B. Thus this can effectively |
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* result in a storage leak if it's done on a regular basis. |
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* It can also result in frequent sharing of |
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* cache lines among processors, with potentially serious performance |
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* consequences. |
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*/ |
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#if !defined (_STLP_PTHREADS) |
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# error POSIX specific allocator implementation. Your system do not seems to \ |
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have this interface so please comment the _STLP_USE_PERTHREAD_ALLOC macro \ |
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or report to the STLport forum. |
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#endif |
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#if defined (_STLP_USE_NO_IOSTREAMS) |
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# error You cannot use per thread allocator implementation without building \ |
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STLport libraries. |
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#endif |
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#ifndef _STLP_INTERNAL_ALLOC_H |
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# include <stl/_alloc.h> |
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#endif |
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_STLP_BEGIN_NAMESPACE |
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_STLP_MOVE_TO_PRIV_NAMESPACE |
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struct _Pthread_alloc_per_thread_state; |
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// Pthread-specific allocator. |
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class _STLP_CLASS_DECLSPEC _Pthread_alloc { |
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public: // but only for internal use: |
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typedef _Pthread_alloc_per_thread_state __state_type; |
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typedef char value_type; |
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public: |
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// Return a recycled or new per thread state. |
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static __state_type * _STLP_CALL _S_get_per_thread_state(); |
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/* n must be > 0 */ |
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static void * _STLP_CALL allocate(size_t& __n); |
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/* p may not be 0 */ |
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static void _STLP_CALL deallocate(void *__p, size_t __n); |
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// boris : versions for per_thread_allocator |
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/* n must be > 0 */ |
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static void * _STLP_CALL allocate(size_t& __n, __state_type* __a); |
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/* p may not be 0 */ |
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static void _STLP_CALL deallocate(void *__p, size_t __n, __state_type* __a); |
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static void * _STLP_CALL reallocate(void *__p, size_t __old_sz, size_t& __new_sz); |
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}; |
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_STLP_MOVE_TO_STD_NAMESPACE |
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typedef _STLP_PRIV _Pthread_alloc __pthread_alloc; |
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typedef __pthread_alloc pthread_alloc; |
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template <class _Tp> |
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class pthread_allocator : public __stlport_class<pthread_allocator<_Tp> > { |
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typedef pthread_alloc _S_Alloc; // The underlying allocator. |
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public: |
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typedef size_t size_type; |
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typedef ptrdiff_t difference_type; |
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typedef _Tp* pointer; |
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typedef const _Tp* const_pointer; |
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typedef _Tp& reference; |
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typedef const _Tp& const_reference; |
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typedef _Tp value_type; |
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107 |
|
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#ifdef _STLP_MEMBER_TEMPLATE_CLASSES |
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template <class _NewType> struct rebind { |
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typedef pthread_allocator<_NewType> other; |
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}; |
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#endif |
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113 |
|
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pthread_allocator() _STLP_NOTHROW {} |
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pthread_allocator(const pthread_allocator<_Tp>& a) _STLP_NOTHROW {} |
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116 |
|
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#if defined (_STLP_MEMBER_TEMPLATES) /* && defined (_STLP_FUNCTION_PARTIAL_ORDER) */ |
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template <class _OtherType> pthread_allocator(const pthread_allocator<_OtherType>&) |
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_STLP_NOTHROW {} |
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#endif |
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121 |
|
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~pthread_allocator() _STLP_NOTHROW {} |
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123 |
|
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pointer address(reference __x) const { return &__x; } |
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const_pointer address(const_reference __x) const { return &__x; } |
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126 |
|
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// __n is permitted to be 0. The C++ standard says nothing about what |
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// the return value is when __n == 0. |
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_Tp* allocate(size_type __n, const void* = 0) { |
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if (__n > max_size()) { |
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__THROW_BAD_ALLOC; |
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} |
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if (__n != 0) { |
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size_type __buf_size = __n * sizeof(value_type); |
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_Tp* __ret = __REINTERPRET_CAST(value_type*, _S_Alloc::allocate(__buf_size)); |
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#if defined (_STLP_DEBUG_UNINITIALIZED) && !defined (_STLP_DEBUG_ALLOC) |
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if (__ret != 0) { |
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memset((char*)__ret, _STLP_SHRED_BYTE, __buf_size); |
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} |
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#endif |
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return __ret; |
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} |
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else |
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return 0; |
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} |
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146 |
|
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void deallocate(pointer __p, size_type __n) { |
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_STLP_ASSERT( (__p == 0) == (__n == 0) ) |
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if (__p != 0) { |
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#if defined (_STLP_DEBUG_UNINITIALIZED) && !defined (_STLP_DEBUG_ALLOC) |
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memset((char*)__p, _STLP_SHRED_BYTE, __n * sizeof(value_type)); |
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#endif |
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_S_Alloc::deallocate(__p, __n * sizeof(value_type)); |
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} |
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} |
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156 |
|
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size_type max_size() const _STLP_NOTHROW |
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{ return size_t(-1) / sizeof(_Tp); } |
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|
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void construct(pointer __p, const _Tp& __val) { _STLP_PLACEMENT_NEW (__p) _Tp(__val); } |
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void destroy(pointer _p) { _p->~_Tp(); } |
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162 |
|
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#if defined (_STLP_NO_EXTENSIONS) |
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/* STLport extension giving rounded size of an allocated memory buffer |
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* This method do not have to be part of a user defined allocator implementation |
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* and won't even be called if such a function was granted. |
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*/ |
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protected: |
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#endif |
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_Tp* allocate(size_type __n, size_type& __allocated_n) { |
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if (__n > max_size()) { |
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__THROW_BAD_ALLOC; |
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} |
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if (__n != 0) { |
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size_type __buf_size = __n * sizeof(value_type); |
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_Tp* __ret = __REINTERPRET_CAST(value_type*, _S_Alloc::allocate(__buf_size)); |
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#if defined (_STLP_DEBUG_UNINITIALIZED) && !defined (_STLP_DEBUG_ALLOC) |
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if (__ret != 0) { |
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memset((char*)__ret, _STLP_SHRED_BYTE, __buf_size); |
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} |
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#endif |
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__allocated_n = __buf_size / sizeof(value_type); |
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return __ret; |
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} |
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else |
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return 0; |
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} |
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}; |
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|
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_STLP_TEMPLATE_NULL |
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class _STLP_CLASS_DECLSPEC pthread_allocator<void> { |
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public: |
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typedef size_t size_type; |
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typedef ptrdiff_t difference_type; |
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typedef void* pointer; |
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typedef const void* const_pointer; |
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typedef void value_type; |
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#ifdef _STLP_MEMBER_TEMPLATE_CLASSES |
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template <class _NewType> struct rebind { |
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typedef pthread_allocator<_NewType> other; |
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}; |
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#endif |
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}; |
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|
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template <class _T1, class _T2> |
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inline bool operator==(const pthread_allocator<_T1>&, |
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const pthread_allocator<_T2>& a2) |
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{ return true; } |
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#ifdef _STLP_FUNCTION_TMPL_PARTIAL_ORDER |
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template <class _T1, class _T2> |
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inline bool operator!=(const pthread_allocator<_T1>&, |
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const pthread_allocator<_T2>&) |
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{ return false; } |
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#endif |
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#if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) |
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|
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# if defined (_STLP_USE_RAW_SGI_ALLOCATORS) |
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template <class _Tp> |
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struct _Alloc_traits<_Tp, _Pthread_alloc> |
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{ typedef __allocator<_Tp, _Pthread_alloc> allocator_type; }; |
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# endif |
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template <class _Tp, class _Atype> |
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struct _Alloc_traits<_Tp, pthread_allocator<_Atype> > |
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{ typedef pthread_allocator<_Tp> allocator_type; }; |
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|
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#endif |
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|
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#if defined (_STLP_DONT_SUPPORT_REBIND_MEMBER_TEMPLATE) |
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template <class _Tp1, class _Tp2> |
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inline pthread_allocator<_Tp2>& |
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__stl_alloc_rebind(pthread_allocator<_Tp1>& __x, const _Tp2*) |
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{ return (pthread_allocator<_Tp2>&)__x; } |
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|
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template <class _Tp1, class _Tp2> |
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inline pthread_allocator<_Tp2> |
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__stl_alloc_create(pthread_allocator<_Tp1>&, const _Tp2*) |
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{ return pthread_allocator<_Tp2>(); } |
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|
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#endif |
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|
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_STLP_MOVE_TO_PRIV_NAMESPACE |
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|
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template <class _Tp> |
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struct __pthread_alloc_type_traits { |
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typedef typename _IsSTLportClass<pthread_allocator<_Tp> >::_Ret _STLportAlloc; |
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//The default allocator implementation which is recognize thanks to the |
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//__stlport_class inheritance is a stateless object so: |
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typedef _STLportAlloc has_trivial_default_constructor; |
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typedef _STLportAlloc has_trivial_copy_constructor; |
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typedef _STLportAlloc has_trivial_assignment_operator; |
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typedef _STLportAlloc has_trivial_destructor; |
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typedef _STLportAlloc is_POD_type; |
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}; |
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|
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_STLP_MOVE_TO_STD_NAMESPACE |
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|
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#if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) |
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template <class _Tp> |
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struct __type_traits<pthread_allocator<_Tp> > : _STLP_PRIV __pthread_alloc_type_traits<_Tp> {}; |
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#else |
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_STLP_TEMPLATE_NULL |
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struct __type_traits<pthread_allocator<char> > : _STLP_PRIV __pthread_alloc_type_traits<char> {}; |
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# if defined (_STLP_HAS_WCHAR_T) |
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_STLP_TEMPLATE_NULL |
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struct __type_traits<pthread_allocator<wchar_t> > : _STLP_PRIV __pthread_alloc_type_traits<wchar_t> {}; |
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# endif |
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# if defined (_STLP_USE_PTR_SPECIALIZATIONS) |
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_STLP_TEMPLATE_NULL |
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struct __type_traits<pthread_allocator<void*> > : _STLP_PRIV __pthread_alloc_type_traits<void*> {}; |
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# endif |
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#endif |
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|
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// |
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// per_thread_allocator<> : this allocator always return memory to the same thread |
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// it was allocated from. |
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// |
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|
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template <class _Tp> |
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class per_thread_allocator { |
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typedef pthread_alloc _S_Alloc; // The underlying allocator. |
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typedef pthread_alloc::__state_type __state_type; |
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public: |
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typedef size_t size_type; |
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typedef ptrdiff_t difference_type; |
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typedef _Tp* pointer; |
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typedef const _Tp* const_pointer; |
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typedef _Tp& reference; |
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typedef const _Tp& const_reference; |
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typedef _Tp value_type; |
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|
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#ifdef _STLP_MEMBER_TEMPLATE_CLASSES |
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template <class _NewType> struct rebind { |
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typedef per_thread_allocator<_NewType> other; |
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}; |
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#endif |
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|
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per_thread_allocator() _STLP_NOTHROW { |
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_M_state = _S_Alloc::_S_get_per_thread_state(); |
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} |
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per_thread_allocator(const per_thread_allocator<_Tp>& __a) _STLP_NOTHROW : _M_state(__a._M_state){} |
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|
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#if defined (_STLP_MEMBER_TEMPLATES) /* && defined (_STLP_FUNCTION_PARTIAL_ORDER) */ |
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template <class _OtherType> per_thread_allocator(const per_thread_allocator<_OtherType>& __a) |
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_STLP_NOTHROW : _M_state(__a._M_state) {} |
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#endif |
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311 |
|
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~per_thread_allocator() _STLP_NOTHROW {} |
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313 |
|
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pointer address(reference __x) const { return &__x; } |
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const_pointer address(const_reference __x) const { return &__x; } |
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316 |
|
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// __n is permitted to be 0. The C++ standard says nothing about what |
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// the return value is when __n == 0. |
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_Tp* allocate(size_type __n, const void* = 0) { |
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if (__n > max_size()) { |
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__THROW_BAD_ALLOC; |
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} |
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if (__n != 0) { |
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size_type __buf_size = __n * sizeof(value_type); |
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_Tp* __ret = __REINTERPRET_CAST(_Tp*, _S_Alloc::allocate(__buf_size, _M_state)); |
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#if defined (_STLP_DEBUG_UNINITIALIZED) && !defined (_STLP_DEBUG_ALLOC) |
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if (__ret != 0) { |
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memset((char*)__ret, _STLP_SHRED_BYTE, __buf_size); |
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} |
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#endif |
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return __ret; |
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} |
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333 |
else |
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return 0; |
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} |
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336 |
|
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void deallocate(pointer __p, size_type __n) { |
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_STLP_ASSERT( (__p == 0) == (__n == 0) ) |
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if (__p != 0) { |
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#if defined (_STLP_DEBUG_UNINITIALIZED) && !defined (_STLP_DEBUG_ALLOC) |
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memset((char*)__p, _STLP_SHRED_BYTE, __n * sizeof(value_type)); |
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342 |
#endif |
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_S_Alloc::deallocate(__p, __n * sizeof(value_type), _M_state); |
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} |
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} |
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346 |
|
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size_type max_size() const _STLP_NOTHROW |
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{ return size_t(-1) / sizeof(_Tp); } |
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349 |
|
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void construct(pointer __p, const _Tp& __val) { _STLP_PLACEMENT_NEW (__p) _Tp(__val); } |
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void destroy(pointer _p) { _p->~_Tp(); } |
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352 |
|
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// state is being kept here |
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__state_type* _M_state; |
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355 |
|
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#if defined (_STLP_NO_EXTENSIONS) |
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/* STLport extension giving rounded size of an allocated memory buffer |
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* This method do not have to be part of a user defined allocator implementation |
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* and won't even be called if such a function was granted. |
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*/ |
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361 |
protected: |
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#endif |
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_Tp* allocate(size_type __n, size_type& __allocated_n) { |
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if (__n > max_size()) { |
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__THROW_BAD_ALLOC; |
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} |
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if (__n != 0) { |
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size_type __buf_size = __n * sizeof(value_type); |
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_Tp* __ret = __REINTERPRET_CAST(value_type*, _S_Alloc::allocate(__buf_size, _M_state)); |
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#if defined (_STLP_DEBUG_UNINITIALIZED) && !defined (_STLP_DEBUG_ALLOC) |
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if (__ret != 0) { |
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memset((char*)__ret, _STLP_SHRED_BYTE, __buf_size); |
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} |
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374 |
#endif |
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__allocated_n = __buf_size / sizeof(value_type); |
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return __ret; |
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} |
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else |
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return 0; |
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} |
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}; |
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382 |
|
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_STLP_TEMPLATE_NULL |
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class _STLP_CLASS_DECLSPEC per_thread_allocator<void> { |
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385 |
public: |
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typedef size_t size_type; |
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typedef ptrdiff_t difference_type; |
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typedef void* pointer; |
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typedef const void* const_pointer; |
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typedef void value_type; |
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#ifdef _STLP_MEMBER_TEMPLATE_CLASSES |
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template <class _NewType> struct rebind { |
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typedef per_thread_allocator<_NewType> other; |
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}; |
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#endif |
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}; |
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397 |
|
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template <class _T1, class _T2> |
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inline bool operator==(const per_thread_allocator<_T1>& __a1, |
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const per_thread_allocator<_T2>& __a2) |
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{ return __a1._M_state == __a2._M_state; } |
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402 |
|
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#ifdef _STLP_FUNCTION_TMPL_PARTIAL_ORDER |
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template <class _T1, class _T2> |
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inline bool operator!=(const per_thread_allocator<_T1>& __a1, |
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const per_thread_allocator<_T2>& __a2) |
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{ return __a1._M_state != __a2._M_state; } |
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#endif |
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409 |
|
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|
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#if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) |
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template <class _Tp, class _Atype> |
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struct _Alloc_traits<_Tp, per_thread_allocator<_Atype> > |
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{ typedef per_thread_allocator<_Tp> allocator_type; }; |
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#endif |
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#if defined (_STLP_DONT_SUPPORT_REBIND_MEMBER_TEMPLATE) |
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template <class _Tp1, class _Tp2> |
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inline per_thread_allocator<_Tp2>& |
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__stl_alloc_rebind(per_thread_allocator<_Tp1>& __x, const _Tp2*) |
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{ return (per_thread_allocator<_Tp2>&)__x; } |
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template <class _Tp1, class _Tp2> |
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inline per_thread_allocator<_Tp2> |
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__stl_alloc_create(per_thread_allocator<_Tp1>&, const _Tp2*) |
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{ return per_thread_allocator<_Tp2>(); } |
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#endif /* _STLP_DONT_SUPPORT_REBIND_MEMBER_TEMPLATE */ |
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_STLP_MOVE_TO_PRIV_NAMESPACE |
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template <class _Tp> |
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struct __perthread_alloc_type_traits { |
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typedef typename _IsSTLportClass<per_thread_allocator<_Tp> >::_Ret _STLportAlloc; |
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//The default allocator implementation which is recognize thanks to the |
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//__stlport_class inheritance is a stateless object so: |
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typedef __false_type has_trivial_default_constructor; |
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typedef _STLportAlloc has_trivial_copy_constructor; |
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typedef _STLportAlloc has_trivial_assignment_operator; |
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typedef _STLportAlloc has_trivial_destructor; |
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typedef __false_type is_POD_type; |
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}; |
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_STLP_MOVE_TO_STD_NAMESPACE |
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#if defined (_STLP_CLASS_PARTIAL_SPECIALIZATION) |
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template <class _Tp> |
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struct __type_traits<per_thread_allocator<_Tp> > : _STLP_PRIV __perthread_alloc_type_traits<_Tp> {}; |
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#else |
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_STLP_TEMPLATE_NULL |
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struct __type_traits<per_thread_allocator<char> > : _STLP_PRIV __perthread_alloc_type_traits<char> {}; |
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# if defined (_STLP_HAS_WCHAR_T) |
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_STLP_TEMPLATE_NULL |
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struct __type_traits<per_thread_allocator<wchar_t> > : _STLP_PRIV __perthread_alloc_type_traits<wchar_t> {}; |
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# endif |
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# if defined (_STLP_USE_PTR_SPECIALIZATIONS) |
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_STLP_TEMPLATE_NULL |
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struct __type_traits<per_thread_allocator<void*> > : _STLP_PRIV __perthread_alloc_type_traits<void*> {}; |
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# endif |
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#endif |
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_STLP_END_NAMESPACE |
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#endif /* _STLP_PTHREAD_ALLOC */ |
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// Local Variables: |
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// mode:C++ |
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// End: |