Imported gcc-4.4.3

[msp430-gcc.git] / libstdc++-v3 / include / ext / array_allocator.h

diff --git a/libstdc++-v3/include/ext/array_allocator.h b/libstdc++-v3/include/ext/array_allocator.h
new file mode 100644 (file)
index 0000000..f36f273
--- /dev/null
+++ b/libstdc++-v3/include/ext/array_allocator.h
@@ -0,0 +1,154 @@
+// array allocator -*- C++ -*-
+
+// Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
+// 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/array_allocator.h
+ *  This file is a GNU extension to the Standard C++ Library.
+ */
+
+#ifndef _ARRAY_ALLOCATOR_H
+#define _ARRAY_ALLOCATOR_H 1
+
+#include <cstddef>
+#include <new>
+#include <bits/functexcept.h>
+#include <tr1/array>
+#include <bits/move.h>
+
+_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
+
+ using std::size_t;
+ using std::ptrdiff_t;
+
+  /// Base class.
+ template<typename _Tp>
+    class array_allocator_base
+    {
+    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;
+
+      pointer
+      address(reference __x) const { return &__x; }
+
+      const_pointer
+      address(const_reference __x) const { return &__x; }
+
+      void
+      deallocate(pointer, size_type)
+      { 
+       // Does nothing.
+      }
+
+      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((void *)__p) value_type(__val); }
+
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+      template<typename... _Args>
+        void
+        construct(pointer __p, _Args&&... __args)
+       { ::new((void *)__p) _Tp(std::forward<_Args>(__args)...); }
+#endif
+
+      void 
+      destroy(pointer __p) { __p->~_Tp(); }
+    };  
+
+  /**
+   *  @brief  An allocator that uses previously allocated memory.
+   *  This memory can be externally, globally, or otherwise allocated.
+   *  @ingroup allocators
+   */
+  template<typename _Tp, typename _Array = std::tr1::array<_Tp, 1> >
+    class array_allocator : public array_allocator_base<_Tp>
+    {
+    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;
+      typedef _Array           array_type;
+
+    private:
+      array_type*      _M_array;
+      size_type        _M_used;
+
+    public:
+     template<typename _Tp1, typename _Array1 = _Array>
+        struct rebind
+        { typedef array_allocator<_Tp1, _Array1> other; };
+
+      array_allocator(array_type* __array = NULL) throw() 
+      : _M_array(__array), _M_used(size_type()) { }
+
+      array_allocator(const array_allocator& __o)  throw() 
+      : _M_array(__o._M_array), _M_used(__o._M_used) { }
+
+      template<typename _Tp1, typename _Array1>
+        array_allocator(const array_allocator<_Tp1, _Array1>&) throw()
+       : _M_array(NULL), _M_used(size_type()) { }
+
+      ~array_allocator() throw() { }
+
+      pointer
+      allocate(size_type __n, const void* = 0)
+      {
+       if (_M_array == 0 || _M_used + __n > _M_array->size())
+         std::__throw_bad_alloc();
+       pointer __ret = _M_array->begin() + _M_used;
+       _M_used += __n;
+       return __ret;
+      }
+    };
+
+  template<typename _Tp, typename _Array>
+    inline bool
+    operator==(const array_allocator<_Tp, _Array>&,
+              const array_allocator<_Tp, _Array>&)
+    { return true; }
+  
+  template<typename _Tp, typename _Array>
+    inline bool
+    operator!=(const array_allocator<_Tp, _Array>&, 
+              const array_allocator<_Tp, _Array>&)
+    { return false; }
+
+_GLIBCXX_END_NAMESPACE
+
+#endif