// Allocators -*- C++ -*-
-// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+// Copyright (C) 2001-2014 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)
+// 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,
// 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.
+// 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.
-// 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.
+// 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/>.
/*
* Copyright (c) 1996-1997
/** @file ext/debug_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 _DEBUG_ALLOCATOR_H
#define _DEBUG_ALLOCATOR_H 1
-#include <memory>
+#include <stdexcept>
+#include <bits/functexcept.h>
+#include <ext/alloc_traits.h>
-namespace __gnu_cxx
+namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ using std::size_t;
+
/**
- * @brief A meta-allocator with debugging bits, as per [20.4].
+ * @brief A meta-allocator with debugging bits.
+ * @ingroup allocators
*
- * This is precisely the allocator defined in the C++ Standard.
- * - all allocation calls operator new
- * - all deallocation calls operator delete
- *
- * (See @link Allocators allocators info @endlink for more.)
+ * This is precisely the allocator defined in the C++03 Standard.
*/
template<typename _Alloc>
class debug_allocator
{
+ template<typename> friend class debug_allocator;
+
+ typedef __alloc_traits<_Alloc> _Traits;
+
public:
- typedef typename _Alloc::size_type size_type;
- typedef typename _Alloc::difference_type difference_type;
- typedef typename _Alloc::pointer pointer;
- typedef typename _Alloc::const_pointer const_pointer;
- typedef typename _Alloc::reference reference;
- typedef typename _Alloc::const_reference const_reference;
- typedef typename _Alloc::value_type value_type;
+ typedef typename _Traits::size_type size_type;
+ typedef typename _Traits::difference_type difference_type;
+ typedef typename _Traits::pointer pointer;
+ typedef typename _Traits::const_pointer const_pointer;
+ typedef typename _Traits::reference reference;
+ typedef typename _Traits::const_reference const_reference;
+ typedef typename _Traits::value_type value_type;
+
+ template<typename _Up>
+ class rebind
+ {
+ typedef typename _Traits::template rebind<_Up>::other __other;
+
+ public:
+ typedef debug_allocator<__other> other;
+ };
private:
- // Size of space used to store size. Note that this must be
- // large enough to preserve alignment.
- const size_t _M_extra;
+ // _M_extra is the number of objects that correspond to the
+ // extra space where debug information is stored.
+ size_type _M_extra;
_Alloc _M_allocator;
+ template<typename _Alloc2,
+ typename = typename _Alloc2::template rebind<value_type>::other>
+ struct __convertible
+ { };
+
+ template<typename _Alloc2>
+ struct __convertible<_Alloc2, _Alloc>
+ {
+ typedef void* __type;
+ };
+
+ size_type _S_extra()
+ {
+ const size_t __obj_size = sizeof(value_type);
+ return (sizeof(size_type) + __obj_size - 1) / __obj_size;
+ }
+
public:
- debug_allocator() : _M_extra(8) { }
+ debug_allocator() : _M_extra(_S_extra()) { }
+
+ template<typename _Alloc2>
+ debug_allocator(const debug_allocator<_Alloc2>& __a2,
+ typename __convertible<_Alloc2>::__type = 0)
+ : _M_allocator(__a2._M_allocator), _M_extra(_S_extra()) { }
+
+ debug_allocator(const _Alloc& __a)
+ : _M_allocator(__a), _M_extra(_S_extra()) { }
pointer
- allocate(size_type __n, std::allocator<void>::const_pointer = 0)
+ allocate(size_type __n)
{
- pointer __result = _M_allocator.allocate(__n + _M_extra);
- *__result = __n;
- return __result + _M_extra;
+ pointer __res = _M_allocator.allocate(__n + _M_extra);
+ size_type* __ps = reinterpret_cast<size_type*>(__res);
+ *__ps = __n;
+ return __res + _M_extra;
+ }
+
+ pointer
+ allocate(size_type __n, const void* __hint)
+ {
+ pointer __res = _M_allocator.allocate(__n + _M_extra, __hint);
+ size_type* __ps = reinterpret_cast<size_type*>(__res);
+ *__ps = __n;
+ return __res + _M_extra;
}
void
deallocate(pointer __p, size_type __n)
{
- pointer __real_p = __p - _M_extra;
- if (*__real_p != __n)
- abort();
- _M_allocator.deallocate(__real_p, __n + _M_extra);
+ using std::__throw_runtime_error;
+ if (__p)
+ {
+ pointer __real_p = __p - _M_extra;
+ if (*reinterpret_cast<size_type*>(__real_p) != __n)
+ __throw_runtime_error("debug_allocator::deallocate wrong size");
+ _M_allocator.deallocate(__real_p, __n + _M_extra);
+ }
+ else
+ __throw_runtime_error("debug_allocator::deallocate null pointer");
}
+
+ void
+ construct(pointer __p, const value_type& __val)
+ { _Traits::construct(_M_allocator, __p, __val); }
+
+#if __cplusplus >= 201103L
+ template<typename _Tp, typename... _Args>
+ void
+ construct(_Tp* __p, _Args&&... __args)
+ {
+ _Traits::construct(_M_allocator, __p,
+ std::forward<_Args>(__args)...);
+ }
+#endif
+
+ template<typename _Tp>
+ void
+ destroy(_Tp* __p)
+ { _Traits::destroy(_M_allocator, __p); }
+
+ size_type
+ max_size() const throw()
+ { return _Traits::max_size(_M_allocator) - _M_extra; }
+
+ friend bool
+ operator==(const debug_allocator& __lhs, const debug_allocator& __rhs)
+ { return __lhs._M_allocator == __rhs._M_allocator; }
};
-} // namespace __gnu_cxx
+
+ template<typename _Alloc>
+ inline bool
+ operator!=(const debug_allocator<_Alloc>& __lhs,
+ const debug_allocator<_Alloc>& __rhs)
+ { return !(__lhs == __rhs); }
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
#endif
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