diff options
Diffstat (limited to 'chromium/third_party/cygwin/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/ext/pool_allocator.h')
| -rw-r--r-- | chromium/third_party/cygwin/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/ext/pool_allocator.h | 255 |
1 files changed, 0 insertions, 255 deletions
diff --git a/chromium/third_party/cygwin/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/ext/pool_allocator.h b/chromium/third_party/cygwin/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/ext/pool_allocator.h deleted file mode 100644 index 0f087a03c1e..00000000000 --- a/chromium/third_party/cygwin/lib/gcc/i686-pc-cygwin/3.4.4/include/c++/ext/pool_allocator.h +++ /dev/null @@ -1,255 +0,0 @@ -// Allocators -*- C++ -*- - -// Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc. -// -// This file is part of the GNU ISO C++ Library. This library is free -// software; you can redistribute it and/or modify it under the -// terms of the GNU General Public License as published by the -// Free Software Foundation; either version 2, or (at your option) -// any later version. - -// This library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. - -// You should have received a copy of the GNU General Public License along -// with this library; see the file COPYING. If not, write to the Free -// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, -// USA. - -// As a special exception, you may use this file as part of a free software -// library without restriction. Specifically, if other files instantiate -// templates or use macros or inline functions from this file, or you compile -// this file and link it with other files to produce an executable, this -// file does not by itself cause the resulting executable to be covered by -// the GNU General Public License. This exception does not however -// invalidate any other reasons why the executable file might be covered by -// the GNU General Public License. - -/* - * Copyright (c) 1996-1997 - * Silicon Graphics Computer Systems, Inc. - * - * Permission to use, copy, modify, distribute and sell this software - * and its documentation for any purpose is hereby granted without fee, - * provided that the above copyright notice appear in all copies and - * that both that copyright notice and this permission notice appear - * in supporting documentation. Silicon Graphics makes no - * representations about the suitability of this software for any - * purpose. It is provided "as is" without express or implied warranty. - */ - -/** @file ext/pool_allocator.h - * This file is a GNU extension to the Standard C++ Library. - * You should only include this header if you are using GCC 3 or later. - */ -#ifndef _POOL_ALLOCATOR_H -#define _POOL_ALLOCATOR_H 1 - -#include <bits/c++config.h> -#include <cstdlib> -#include <new> -#include <bits/functexcept.h> -#include <bits/atomicity.h> -#include <bits/concurrence.h> - -namespace __gnu_cxx -{ - /** - * @if maint - * Uses various allocators to fulfill underlying requests (and makes as - * few requests as possible when in default high-speed pool mode). - * - * Important implementation properties: - * 0. If globally mandated, then allocate objects from new - * 1. If the clients request an object of size > _S_max_bytes, the resulting - * object will be obtained directly from new - * 2. In all other cases, we allocate an object of size exactly - * _S_round_up(requested_size). Thus the client has enough size - * information that we can return the object to the proper free list - * without permanently losing part of the object. - * - * @endif - * (See @link Allocators allocators info @endlink for more.) - */ - class __pool_alloc_base - { - protected: - - enum { _S_align = 8 }; - enum { _S_max_bytes = 128 }; - enum { _S_free_list_size = _S_max_bytes / _S_align }; - - union _Obj - { - union _Obj* _M_free_list_link; - char _M_client_data[1]; // The client sees this. - }; - - static _Obj* volatile _S_free_list[_S_free_list_size]; - - // Chunk allocation state. - static char* _S_start_free; - static char* _S_end_free; - static size_t _S_heap_size; - - size_t - _M_round_up(size_t __bytes) - { return ((__bytes + (size_t)_S_align - 1) & ~((size_t)_S_align - 1)); } - - _Obj* volatile* - _M_get_free_list(size_t __bytes); - - mutex_type& - _M_get_mutex(); - - // Returns an object of size __n, and optionally adds to size __n - // free list. - void* - _M_refill(size_t __n); - - // Allocates a chunk for nobjs of size size. nobjs may be reduced - // if it is inconvenient to allocate the requested number. - char* - _M_allocate_chunk(size_t __n, int& __nobjs); - }; - - - template<typename _Tp> - class __pool_alloc : private __pool_alloc_base - { - private: - static _Atomic_word _S_force_new; - - public: - typedef size_t size_type; - typedef ptrdiff_t difference_type; - typedef _Tp* pointer; - typedef const _Tp* const_pointer; - typedef _Tp& reference; - typedef const _Tp& const_reference; - typedef _Tp value_type; - - template<typename _Tp1> - struct rebind - { typedef __pool_alloc<_Tp1> other; }; - - __pool_alloc() throw() { } - - __pool_alloc(const __pool_alloc&) throw() { } - - template<typename _Tp1> - __pool_alloc(const __pool_alloc<_Tp1>&) throw() { } - - ~__pool_alloc() throw() { } - - pointer - address(reference __x) const { return &__x; } - - const_pointer - address(const_reference __x) const { return &__x; } - - size_type - max_size() const throw() - { return size_t(-1) / sizeof(_Tp); } - - // _GLIBCXX_RESOLVE_LIB_DEFECTS - // 402. wrong new expression in [some_] allocator::construct - void - construct(pointer __p, const _Tp& __val) - { ::new(__p) _Tp(__val); } - - void - destroy(pointer __p) { __p->~_Tp(); } - - pointer - allocate(size_type __n, const void* = 0); - - void - deallocate(pointer __p, size_type __n); - }; - - template<typename _Tp> - inline bool - operator==(const __pool_alloc<_Tp>&, const __pool_alloc<_Tp>&) - { return true; } - - template<typename _Tp> - inline bool - operator!=(const __pool_alloc<_Tp>&, const __pool_alloc<_Tp>&) - { return false; } - - template<typename _Tp> - _Atomic_word - __pool_alloc<_Tp>::_S_force_new; - - template<typename _Tp> - _Tp* - __pool_alloc<_Tp>::allocate(size_type __n, const void*) - { - pointer __ret = 0; - if (__n) - { - if (__n <= max_size()) - { - // If there is a race through here, assume answer from getenv - // will resolve in same direction. Inspired by techniques - // to efficiently support threading found in basic_string.h. - if (_S_force_new == 0) - { - if (getenv("GLIBCXX_FORCE_NEW")) - __atomic_add(&_S_force_new, 1); - else - __atomic_add(&_S_force_new, -1); - } - - const size_t __bytes = __n * sizeof(_Tp); - if (__bytes > size_t(_S_max_bytes) || _S_force_new == 1) - __ret = static_cast<_Tp*>(::operator new(__bytes)); - else - { - _Obj* volatile* __free_list = _M_get_free_list(__bytes); - - lock sentry(_M_get_mutex()); - _Obj* __restrict__ __result = *__free_list; - if (__builtin_expect(__result == 0, 0)) - __ret = static_cast<_Tp*>(_M_refill(_M_round_up(__bytes))); - else - { - *__free_list = __result->_M_free_list_link; - __ret = reinterpret_cast<_Tp*>(__result); - } - if (__builtin_expect(__ret == 0, 0)) - std::__throw_bad_alloc(); - } - } - else - std::__throw_bad_alloc(); - } - return __ret; - } - - template<typename _Tp> - void - __pool_alloc<_Tp>::deallocate(pointer __p, size_type __n) - { - if (__n) - { - const size_t __bytes = __n * sizeof(_Tp); - if (__bytes > static_cast<size_t>(_S_max_bytes) || _S_force_new == 1) - ::operator delete(__p); - else - { - _Obj* volatile* __free_list = _M_get_free_list(__bytes); - _Obj* __q = reinterpret_cast<_Obj*>(__p); - - lock sentry(_M_get_mutex()); - __q ->_M_free_list_link = *__free_list; - *__free_list = __q; - } - } - } -} // namespace __gnu_cxx - -#endif |