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//usr/include/c++/8/ext/malloc_allocator.h

// Allocator that wraps "C" malloc -*- C++ -*-

// Copyright (C) 2001-2018 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 3, 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.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file ext/malloc_allocator.h
 *  This file is a GNU extension to the Standard C++ Library.
 */

#ifndef _MALLOC_ALLOCATOR_H
#define _MALLOC_ALLOCATOR_H 1

#include <cstdlib>
#include <cstddef>
#include <new>
#include <bits/functexcept.h>
#include <bits/move.h>
#if __cplusplus >= 201103L
#include <type_traits>
#endif

namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  using std::size_t;
  using std::ptrdiff_t;

  /**
   *  @brief  An allocator that uses malloc.
   *  @ingroup allocators
   *
   *  This is precisely the allocator defined in the C++ Standard. 
   *    - all allocation calls malloc
   *    - all deallocation calls free
   */
  template<typename _Tp>
    class malloc_allocator
    {
    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 malloc_allocator<_Tp1> other; };

#if __cplusplus >= 201103L
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 2103. propagate_on_container_move_assignment
      typedef std::true_type propagate_on_container_move_assignment;
#endif

      malloc_allocator() _GLIBCXX_USE_NOEXCEPT { }

      malloc_allocator(const malloc_allocator&) _GLIBCXX_USE_NOEXCEPT { }

      template<typename _Tp1>
        malloc_allocator(const malloc_allocator<_Tp1>&)
	_GLIBCXX_USE_NOEXCEPT { }

      ~malloc_allocator() _GLIBCXX_USE_NOEXCEPT { }

      pointer
      address(reference __x) const _GLIBCXX_NOEXCEPT
      { return std::__addressof(__x); }

      const_pointer
      address(const_reference __x) const _GLIBCXX_NOEXCEPT
      { return std::__addressof(__x); }

      // NB: __n is permitted to be 0.  The C++ standard says nothing
      // about what the return value is when __n == 0.
      pointer
      allocate(size_type __n, const void* = 0)
      {
	if (__n > this->max_size())
	  std::__throw_bad_alloc();

	pointer __ret = 0;
#if __cpp_aligned_new
#if __cplusplus > 201402L && _GLIBCXX_HAVE_ALIGNED_ALLOC
	if (alignof(_Tp) > alignof(std::max_align_t))
	  {
	    __ret = static_cast<_Tp*>(::aligned_alloc(alignof(_Tp),
						      __n * sizeof(_Tp)));
	  }
#else
# define _GLIBCXX_CHECK_MALLOC_RESULT
#endif
#endif
	if (!__ret)
	  __ret = static_cast<_Tp*>(std::malloc(__n * sizeof(_Tp)));
	if (!__ret)
	  std::__throw_bad_alloc();
#ifdef _GLIBCXX_CHECK_MALLOC_RESULT
#undef _GLIBCXX_CHECK_MALLOC_RESULT
	  if (reinterpret_cast<std::size_t>(__ret) % alignof(_Tp))
	    {
	      // Memory returned by malloc is not suitably aligned for _Tp.
	      deallocate(__ret, __n);
	      std::__throw_bad_alloc();
	    }
#endif
	return __ret;
      }

      // __p is not permitted to be a null pointer.
      void
      deallocate(pointer __p, size_type)
      { std::free(static_cast<void*>(__p)); }

      size_type
      max_size() const _GLIBCXX_USE_NOEXCEPT 
      { return size_t(-1) / sizeof(_Tp); }

#if __cplusplus >= 201103L
      template<typename _Up, typename... _Args>
        void
        construct(_Up* __p, _Args&&... __args)
	{ ::new((void *)__p) _Up(std::forward<_Args>(__args)...); }

      template<typename _Up>
        void 
        destroy(_Up* __p) { __p->~_Up(); }
#else
      // _GLIBCXX_RESOLVE_LIB_DEFECTS
      // 402. wrong new expression in [some_] allocator::construct
      void 
      construct(pointer __p, const _Tp& __val) 
      { ::new((void *)__p) value_type(__val); }

      void 
      destroy(pointer __p) { __p->~_Tp(); }
#endif
    };

  template<typename _Tp>
    inline bool
    operator==(const malloc_allocator<_Tp>&, const malloc_allocator<_Tp>&)
    { return true; }
  
  template<typename _Tp>
    inline bool
    operator!=(const malloc_allocator<_Tp>&, const malloc_allocator<_Tp>&)
    { return false; }

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif

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pb_ds DIR	-	drwxr-xr-x	2025-08-29 23:02:20	Edit Download recursive recursive
algorithm	18.84 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
aligned_buffer.h	3.88 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
alloc_traits.h	5.57 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
array_allocator.h	5.26 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
atomicity.h	3.43 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
bitmap_allocator.h	31.08 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
cast.h	4.34 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
cmath	6.42 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
codecvt_specializations.h	15.97 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
concurrence.h	7.43 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
debug_allocator.h	5.58 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
enc_filebuf.h	2.19 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
extptr_allocator.h	6.04 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
functional	13.96 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
hash_map	17.36 KB	lrw-r--r--	2025-08-26 09:45:01	Edit Download recursive recursive
hash_set	16.79 KB	lrw-r--r--	2025-08-26 09:45:01	Edit Download recursive recursive
iterator	3.94 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
malloc_allocator.h	4.97 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
memory	6.99 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
mt_allocator.h	22.96 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
new_allocator.h	4.69 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
numeric	4.62 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
numeric_traits.h	4.47 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
pod_char_traits.h	5.43 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
pointer.h	19.36 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
pool_allocator.h	8.61 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
random	108.78 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
random.tcc	58.83 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
rb_tree	3.23 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
rc_string_base.h	23.18 KB	lrw-r--r--	2025-08-26 09:45:01	Edit Download recursive recursive
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ropeimpl.h	47.30 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
slist	28.91 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
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stdio_filebuf.h	5.54 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stdio_sync_filebuf.h	8.58 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
string_conversions.h	3.51 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
throw_allocator.h	23.96 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
typelist.h	16.09 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
type_traits.h	5.78 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
vstring.h	107.98 KB	lrw-r--r--	2025-08-26 09:45:01	Edit Download recursive recursive
vstring.tcc	23.06 KB	lrw-r--r--	2025-08-26 09:45:01	Edit Download recursive recursive
vstring_fwd.h	3.15 KB	lrw-r--r--	2025-08-26 09:45:01	Edit Download recursive recursive
vstring_util.h	5.63 KB	lrw-r--r--	2025-08-26 09:45:01	Edit Download recursive recursive