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	netbsd-11-0-RC5:1.1.1.2
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	netbsd-11-0-RC3:1.1.1.2
	netbsd-11-0-RC2:1.1.1.2
	netbsd-11-0-RC1:1.1.1.2
	gcc-14-3-0:1.1.1.3
	perseant-exfatfs-base-20250801:1.1.1.2
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	netbsd-11-base:1.1.1.2
	gcc-12-5-0:1.1.1.2
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	gcc-12-4-0:1.1.1.2
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1.1
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1.1.1.1
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1.1.1.1.2.1
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desc
@@


1.1
log
@Initial revision
@
text
@// Allocator that wraps operator new -*- C++ -*-

// Copyright (C) 2001-2022 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 bits/new_allocator.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @@headername{memory}
 */

#ifndef _STD_NEW_ALLOCATOR_H
#define _STD_NEW_ALLOCATOR_H 1

#include <bits/c++config.h>
#include <new>
#include <bits/functexcept.h>
#include <bits/move.h>
#if __cplusplus >= 201103L
#include <type_traits>
#endif

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  /**
   *  @@brief  An allocator that uses global new, as per C++03 [20.4.1].
   *  @@ingroup allocators
   *
   *  This is precisely the allocator defined in the C++ Standard.
   *    - all allocation calls operator new
   *    - all deallocation calls operator delete
   *
   *  @@tparam  _Tp  Type of allocated object.
   */
  template<typename _Tp>
    class __new_allocator
    {
    public:
      typedef _Tp        value_type;
      typedef std::size_t     size_type;
      typedef std::ptrdiff_t  difference_type;
#if __cplusplus <= 201703L
      typedef _Tp*       pointer;
      typedef const _Tp* const_pointer;
      typedef _Tp&       reference;
      typedef const _Tp& const_reference;

      template<typename _Tp1>
	struct rebind
	{ typedef __new_allocator<_Tp1> other; };
#endif

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

      _GLIBCXX20_CONSTEXPR
      __new_allocator() _GLIBCXX_USE_NOEXCEPT { }

      _GLIBCXX20_CONSTEXPR
      __new_allocator(const __new_allocator&) _GLIBCXX_USE_NOEXCEPT { }

      template<typename _Tp1>
	_GLIBCXX20_CONSTEXPR
	__new_allocator(const __new_allocator<_Tp1>&) _GLIBCXX_USE_NOEXCEPT { }

#if __cplusplus <= 201703L
      ~__new_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); }
#endif

#if __has_builtin(__builtin_operator_new) >= 201802L
# define _GLIBCXX_OPERATOR_NEW __builtin_operator_new
# define _GLIBCXX_OPERATOR_DELETE __builtin_operator_delete
#else
# define _GLIBCXX_OPERATOR_NEW ::operator new
# define _GLIBCXX_OPERATOR_DELETE ::operator delete
#endif

      // NB: __n is permitted to be 0.  The C++ standard says nothing
      // about what the return value is when __n == 0.
      _GLIBCXX_NODISCARD _Tp*
      allocate(size_type __n, const void* = static_cast<const void*>(0))
      {
#if __cplusplus >= 201103L
	// _GLIBCXX_RESOLVE_LIB_DEFECTS
	// 3308. std::allocator<void>().allocate(n)
	static_assert(sizeof(_Tp) != 0, "cannot allocate incomplete types");
#endif

	if (__builtin_expect(__n > this->_M_max_size(), false))
	  {
	    // _GLIBCXX_RESOLVE_LIB_DEFECTS
	    // 3190. allocator::allocate sometimes returns too little storage
	    if (__n > (std::size_t(-1) / sizeof(_Tp)))
	      std::__throw_bad_array_new_length();
	    std::__throw_bad_alloc();
	  }

#if __cpp_aligned_new
	if (alignof(_Tp) > __STDCPP_DEFAULT_NEW_ALIGNMENT__)
	  {
	    std::align_val_t __al = std::align_val_t(alignof(_Tp));
	    return static_cast<_Tp*>(_GLIBCXX_OPERATOR_NEW(__n * sizeof(_Tp),
							   __al));
	  }
#endif
	return static_cast<_Tp*>(_GLIBCXX_OPERATOR_NEW(__n * sizeof(_Tp)));
      }

      // __p is not permitted to be a null pointer.
      void
      deallocate(_Tp* __p, size_type __n __attribute__ ((__unused__)))
      {
#if __cpp_sized_deallocation
# define _GLIBCXX_SIZED_DEALLOC(p, n) (p), (n) * sizeof(_Tp)
#else
# define _GLIBCXX_SIZED_DEALLOC(p, n) (p)
#endif

#if __cpp_aligned_new
	if (alignof(_Tp) > __STDCPP_DEFAULT_NEW_ALIGNMENT__)
	  {
	    _GLIBCXX_OPERATOR_DELETE(_GLIBCXX_SIZED_DEALLOC(__p, __n),
				     std::align_val_t(alignof(_Tp)));
	    return;
	  }
#endif
	_GLIBCXX_OPERATOR_DELETE(_GLIBCXX_SIZED_DEALLOC(__p, __n));
      }

#undef _GLIBCXX_SIZED_DEALLOC
#undef _GLIBCXX_OPERATOR_DELETE
#undef _GLIBCXX_OPERATOR_NEW

#if __cplusplus <= 201703L
      size_type
      max_size() const _GLIBCXX_USE_NOEXCEPT
      { return _M_max_size(); }

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

      template<typename _Up>
	void
	destroy(_Up* __p)
	noexcept(std::is_nothrow_destructible<_Up>::value)
	{ __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) _Tp(__val); }

      void
      destroy(pointer __p) { __p->~_Tp(); }
#endif
#endif // ! C++20

      template<typename _Up>
	friend _GLIBCXX20_CONSTEXPR bool
	operator==(const __new_allocator&, const __new_allocator<_Up>&)
	_GLIBCXX_NOTHROW
	{ return true; }

#if __cpp_impl_three_way_comparison < 201907L
      template<typename _Up>
	friend _GLIBCXX20_CONSTEXPR bool
	operator!=(const __new_allocator&, const __new_allocator<_Up>&)
	_GLIBCXX_NOTHROW
	{ return false; }
#endif

    private:
      _GLIBCXX_CONSTEXPR size_type
      _M_max_size() const _GLIBCXX_USE_NOEXCEPT
      {
#if __PTRDIFF_MAX__ < __SIZE_MAX__
	return std::size_t(__PTRDIFF_MAX__) / sizeof(_Tp);
#else
	return std::size_t(-1) / sizeof(_Tp);
#endif
      }
    };

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif
@


1.1.1.1
log
@initial import of GCC 12.3.0.

major changes in GCC 11 included:

- The default mode for C++ is now -std=gnu++17 instead of -std=gnu++14.
- When building GCC itself, the host compiler must now support C++11,
  rather than C++98.
- Some short options of the gcov tool have been renamed: -i to -j and
  -j to -H.
- ThreadSanitizer improvements.
- Introduce Hardware-assisted AddressSanitizer support.
- For targets that produce DWARF debugging information GCC now defaults
  to DWARF version 5. This can produce up to 25% more compact debug
  information compared to earlier versions.
- Many optimisations.
- The existing malloc attribute has been extended so that it can be
  used to identify allocator/deallocator API pairs. A pair of new
  -Wmismatched-dealloc and -Wmismatched-new-delete warnings are added.
- Other new warnings:
  -Wsizeof-array-div, enabled by -Wall, warns about divisions of two
    sizeof operators when the first one is applied to an array and the
    divisor does not equal the size of the array element.
  -Wstringop-overread, enabled by default, warns about calls to string
    functions reading past the end of the arrays passed to them as
    arguments.
  -Wtsan, enabled by default, warns about unsupported features in
    ThreadSanitizer (currently std::atomic_thread_fence).
- Enchanced warnings:
  -Wfree-nonheap-object detects many more instances of calls to
    deallocation functions with pointers not returned from a dynamic
    memory allocation function.
  -Wmaybe-uninitialized diagnoses passing pointers or references to
    uninitialized memory to functions taking const-qualified arguments.
  -Wuninitialized detects reads from uninitialized dynamically
    allocated memory.
  -Warray-parameter warns about functions with inconsistent array forms.
  -Wvla-parameter warns about functions with inconsistent VLA forms.
- Several new features from the upcoming C2X revision of the ISO C
  standard are supported with -std=c2x and -std=gnu2x.
- Several C++20 features have been implemented.
- The C++ front end has experimental support for some of the upcoming
  C++23 draft.
- Several new C++ warnings.
- Enhanced Arm, AArch64, x86, and RISC-V CPU support.
- The implementation of how program state is tracked within
  -fanalyzer has been completely rewritten with many enhancements.

see https://gcc.gnu.org/gcc-11/changes.html for a full list.

major changes in GCC 12 include:

- An ABI incompatibility between C and C++ when passing or returning
  by value certain aggregates containing zero width bit-fields has
  been discovered on various targets. x86-64, ARM and AArch64
  will always ignore them (so there is a C ABI incompatibility
  between GCC 11 and earlier with GCC 12 or later), PowerPC64 ELFv2
  always take them into account (so there is a C++ ABI
  incompatibility, GCC 4.4 and earlier compatible with GCC 12 or
  later, incompatible with GCC 4.5 through GCC 11). RISC-V has
  changed the handling of these already starting with GCC 10. As
  the ABI requires, MIPS takes them into account handling function
  return values so there is a C++ ABI incompatibility with GCC 4.5
  through 11.
- STABS: Support for emitting the STABS debugging format is
  deprecated and will be removed in the next release. All ports now
  default to emit DWARF (version 2 or later) debugging info or are
  obsoleted.
- Vectorization is enabled at -O2 which is now equivalent to the
  original -O2 -ftree-vectorize -fvect-cost-model=very-cheap.
- GCC now supports the ShadowCallStack sanitizer.
- Support for __builtin_shufflevector compatible with the clang
  language extension was added.
- Support for attribute unavailable was added.
- Support for __builtin_dynamic_object_size compatible with the
  clang language extension was added.
- New warnings:
  -Wbidi-chars warns about potentially misleading UTF-8
    bidirectional control characters.
  -Warray-compare warns about comparisons between two operands of
    array type.
- Some new features from the upcoming C2X revision of the ISO C
  standard are supported with -std=c2x and -std=gnu2x.
- Several C++23 features have been implemented.
- Many C++ enhancements across warnings and -f options.

see https://gcc.gnu.org/gcc-12/changes.html for a full list.
@
text
@@


1.1.1.1.2.1
log
@Sync with HEAD.
@
text
@d46 2
a47 2
   * @@brief  An allocator that uses global `new`, as per C++03 [20.4.1].
   * @@ingroup allocators
d49 3
a51 3
   * This is precisely the allocator defined in the C++ Standard.
   *   - all allocation calls `operator new`
   *   - all deallocation calls `operator delete`
d53 1
a53 8
   * This is the default base-class implementation of `std::allocator`,
   * and is also the base-class of the `__gnu_cxx::new_allocator` extension.
   * You should use either `std::allocator` or `__gnu_cxx::new_allocator`
   * instead of using this directly.
   *
   * @@tparam  _Tp  Type of allocated object.
   *
   * @@headerfile memory
a88 4
#if __cplusplus >= 201103L
      __new_allocator& operator=(const __new_allocator&) = default;
#endif

@


1.1.1.2
log
@import GCC 12.4.0.

this includes at least 85 GCC PRs fixed, 2 C, 17 C++, 16 libstdc++-v3,
at least 13 target-specific (x86, arm64, riscv mostly), and at least
24 optimisation PRs.
@
text
@d46 2
a47 2
   * @@brief  An allocator that uses global `new`, as per C++03 [20.4.1].
   * @@ingroup allocators
d49 3
a51 3
   * This is precisely the allocator defined in the C++ Standard.
   *   - all allocation calls `operator new`
   *   - all deallocation calls `operator delete`
d53 1
a53 8
   * This is the default base-class implementation of `std::allocator`,
   * and is also the base-class of the `__gnu_cxx::new_allocator` extension.
   * You should use either `std::allocator` or `__gnu_cxx::new_allocator`
   * instead of using this directly.
   *
   * @@tparam  _Tp  Type of allocated object.
   *
   * @@headerfile memory
a88 4
#if __cplusplus >= 201103L
      __new_allocator& operator=(const __new_allocator&) = default;
#endif

@


1.1.1.3
log
@initial import of GCC 14.3.0.

major changes in GCC 13:
- improved sanitizer
- zstd debug info compression
- LTO improvements
- SARIF based diagnostic support
- new warnings: -Wxor-used-as-pow, -Wenum-int-mismatch, -Wself-move,
  -Wdangling-reference
- many new -Wanalyzer* specific warnings
- enhanced warnings: -Wpessimizing-move, -Wredundant-move
- new attributes to mark file descriptors, c++23 "assume"
- several C23 features added
- several C++23 features added
- many new features for Arm, x86, RISC-V

major changes in GCC 14:
- more strict C99 or newer support
- ia64* marked deprecated (but seemingly still in GCC 15.)
- several new hardening features
- support for "hardbool", which can have user supplied values of true/false
- explicit support for stack scrubbing upon function exit
- better auto-vectorisation support
- added clang-compatible __has_feature and __has_extension
- more C23, including -std=c23
- several C++26 features added
- better diagnostics in C++ templates
- new warnings: -Wnrvo, Welaborated-enum-base
- many new features for Arm, x86, RISC-V
- possible ABI breaking change for SPARC64 and small structures with arrays
  of floats.
@
text
@d3 1
a3 1
// Copyright (C) 2001-2024 Free Software Foundation, Inc.
a85 1
      __attribute__((__always_inline__))
a88 1
      __attribute__((__always_inline__))
a92 1
	__attribute__((__always_inline__))
d140 1
a140 1
#if __cpp_aligned_new && __cplusplus >= 201103L
d161 1
a161 1
#if __cpp_aligned_new && __cplusplus >= 201103L
a176 1
      __attribute__((__always_inline__))
a182 1
	__attribute__((__always_inline__))
d185 1
a185 1
	noexcept(__is_nothrow_new_constructible<_Up, _Args...>)
a188 1
	__attribute__((__always_inline__))
a195 1
      __attribute__((__always_inline__))
a199 1
      __attribute__((__always_inline__))
d206 1
a206 1
	friend __attribute__((__always_inline__)) _GLIBCXX20_CONSTEXPR bool
d213 1
a213 1
	friend __attribute__((__always_inline__)) _GLIBCXX20_CONSTEXPR bool
a219 1
      __attribute__((__always_inline__))
@