// <memory> -*- C++ -*-
-// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+// 2009, 2010, 2011
// 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, 51 Franklin Street, Fifth Floor,
-// Boston, MA 02110-1301, 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) 1997-1999
#pragma GCC system_header
+/**
+ * @defgroup memory Memory
+ * @ingroup utilities
+ *
+ * Components for memory allocation, deallocation, and management.
+ */
+
+/**
+ * @defgroup pointer_abstractions Pointer Abstractions
+ * @ingroup memory
+ *
+ * Smart pointers, etc.
+ */
+
#include <bits/stl_algobase.h>
#include <bits/allocator.h>
#include <bits/stl_construct.h>
#include <bits/stl_uninitialized.h>
+#include <bits/stl_tempbuf.h>
#include <bits/stl_raw_storage_iter.h>
-#include <debug/debug.h>
-#include <limits>
-
-_GLIBCXX_BEGIN_NAMESPACE(std)
-
- /**
- * @if maint
- * This is a helper function. The unused second parameter exists to
- * permit the real get_temporary_buffer to use template parameter deduction.
- *
- * XXX This should perhaps use the pool.
- * @endif
- */
- template<typename _Tp>
- pair<_Tp*, ptrdiff_t>
- __get_temporary_buffer(ptrdiff_t __len, _Tp*)
- {
- const ptrdiff_t __max = numeric_limits<ptrdiff_t>::max() / sizeof(_Tp);
- if (__len > __max)
- __len = __max;
-
- while (__len > 0)
- {
- _Tp* __tmp = static_cast<_Tp*>(::operator new(__len * sizeof(_Tp),
- nothrow));
- if (__tmp != 0)
- return pair<_Tp*, ptrdiff_t>(__tmp, __len);
- __len /= 2;
- }
- return pair<_Tp*, ptrdiff_t>(static_cast<_Tp*>(0), 0);
- }
-
- /**
- * @brief Allocates a temporary buffer.
- * @param len The number of objects of type Tp.
- * @return See full description.
- *
- * Reinventing the wheel, but this time with prettier spokes!
- *
- * This function tries to obtain storage for @c len adjacent Tp
- * objects. The objects themselves are not constructed, of course.
- * A pair<> is returned containing "the buffer s address and
- * capacity (in the units of sizeof(Tp)), or a pair of 0 values if
- * no storage can be obtained." Note that the capacity obtained
- * may be less than that requested if the memory is unavailable;
- * you should compare len with the .second return value.
- *
- * Provides the nothrow exception guarantee.
- */
- template<typename _Tp>
- inline pair<_Tp*, ptrdiff_t>
- get_temporary_buffer(ptrdiff_t __len)
- { return std::__get_temporary_buffer(__len, static_cast<_Tp*>(0)); }
-
- /**
- * @brief The companion to get_temporary_buffer().
- * @param p A buffer previously allocated by get_temporary_buffer.
- * @return None.
- *
- * Frees the memory pointed to by p.
- */
- template<typename _Tp>
- void
- return_temporary_buffer(_Tp* __p)
- { ::operator delete(__p, nothrow); }
-
- /**
- * A wrapper class to provide auto_ptr with reference semantics.
- * For example, an auto_ptr can be assigned (or constructed from)
- * the result of a function which returns an auto_ptr by value.
- *
- * All the auto_ptr_ref stuff should happen behind the scenes.
- */
- template<typename _Tp1>
- struct auto_ptr_ref
- {
- _Tp1* _M_ptr;
-
- explicit
- auto_ptr_ref(_Tp1* __p): _M_ptr(__p) { }
- };
-
-
- /**
- * @brief A simple smart pointer providing strict ownership semantics.
- *
- * The Standard says:
- * <pre>
- * An @c auto_ptr owns the object it holds a pointer to. Copying
- * an @c auto_ptr copies the pointer and transfers ownership to the
- * destination. If more than one @c auto_ptr owns the same object
- * at the same time the behavior of the program is undefined.
- *
- * The uses of @c auto_ptr include providing temporary
- * exception-safety for dynamically allocated memory, passing
- * ownership of dynamically allocated memory to a function, and
- * returning dynamically allocated memory from a function. @c
- * auto_ptr does not meet the CopyConstructible and Assignable
- * requirements for Standard Library <a
- * href="tables.html#65">container</a> elements and thus
- * instantiating a Standard Library container with an @c auto_ptr
- * results in undefined behavior.
- * </pre>
- * Quoted from [20.4.5]/3.
- *
- * Good examples of what can and cannot be done with auto_ptr can
- * be found in the libstdc++ testsuite.
- *
- * @if maint
- * _GLIBCXX_RESOLVE_LIB_DEFECTS
- * 127. auto_ptr<> conversion issues
- * These resolutions have all been incorporated.
- * @endif
- */
- template<typename _Tp>
- class auto_ptr
- {
- private:
- _Tp* _M_ptr;
-
- public:
- /// The pointed-to type.
- typedef _Tp element_type;
-
- /**
- * @brief An %auto_ptr is usually constructed from a raw pointer.
- * @param p A pointer (defaults to NULL).
- *
- * This object now @e owns the object pointed to by @a p.
- */
- explicit
- auto_ptr(element_type* __p = 0) throw() : _M_ptr(__p) { }
-
- /**
- * @brief An %auto_ptr can be constructed from another %auto_ptr.
- * @param a Another %auto_ptr of the same type.
- *
- * This object now @e owns the object previously owned by @a a,
- * which has given up ownsership.
- */
- auto_ptr(auto_ptr& __a) throw() : _M_ptr(__a.release()) { }
-
- /**
- * @brief An %auto_ptr can be constructed from another %auto_ptr.
- * @param a Another %auto_ptr of a different but related type.
- *
- * A pointer-to-Tp1 must be convertible to a
- * pointer-to-Tp/element_type.
- *
- * This object now @e owns the object previously owned by @a a,
- * which has given up ownsership.
- */
- template<typename _Tp1>
- auto_ptr(auto_ptr<_Tp1>& __a) throw() : _M_ptr(__a.release()) { }
-
- /**
- * @brief %auto_ptr assignment operator.
- * @param a Another %auto_ptr of the same type.
- *
- * This object now @e owns the object previously owned by @a a,
- * which has given up ownsership. The object that this one @e
- * used to own and track has been deleted.
- */
- auto_ptr&
- operator=(auto_ptr& __a) throw()
- {
- reset(__a.release());
- return *this;
- }
-
- /**
- * @brief %auto_ptr assignment operator.
- * @param a Another %auto_ptr of a different but related type.
- *
- * A pointer-to-Tp1 must be convertible to a pointer-to-Tp/element_type.
- *
- * This object now @e owns the object previously owned by @a a,
- * which has given up ownsership. The object that this one @e
- * used to own and track has been deleted.
- */
- template<typename _Tp1>
- auto_ptr&
- operator=(auto_ptr<_Tp1>& __a) throw()
- {
- reset(__a.release());
- return *this;
- }
-
- /**
- * When the %auto_ptr goes out of scope, the object it owns is
- * deleted. If it no longer owns anything (i.e., @c get() is
- * @c NULL), then this has no effect.
- *
- * @if maint
- * The C++ standard says there is supposed to be an empty throw
- * specification here, but omitting it is standard conforming. Its
- * presence can be detected only if _Tp::~_Tp() throws, but this is
- * prohibited. [17.4.3.6]/2
- * @endif
- */
- ~auto_ptr() { delete _M_ptr; }
-
- /**
- * @brief Smart pointer dereferencing.
- *
- * If this %auto_ptr no longer owns anything, then this
- * operation will crash. (For a smart pointer, "no longer owns
- * anything" is the same as being a null pointer, and you know
- * what happens when you dereference one of those...)
- */
- element_type&
- operator*() const throw()
- {
- _GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
- return *_M_ptr;
- }
-
- /**
- * @brief Smart pointer dereferencing.
- *
- * This returns the pointer itself, which the language then will
- * automatically cause to be dereferenced.
- */
- element_type*
- operator->() const throw()
- {
- _GLIBCXX_DEBUG_ASSERT(_M_ptr != 0);
- return _M_ptr;
- }
-
- /**
- * @brief Bypassing the smart pointer.
- * @return The raw pointer being managed.
- *
- * You can get a copy of the pointer that this object owns, for
- * situations such as passing to a function which only accepts
- * a raw pointer.
- *
- * @note This %auto_ptr still owns the memory.
- */
- element_type*
- get() const throw() { return _M_ptr; }
-
- /**
- * @brief Bypassing the smart pointer.
- * @return The raw pointer being managed.
- *
- * You can get a copy of the pointer that this object owns, for
- * situations such as passing to a function which only accepts
- * a raw pointer.
- *
- * @note This %auto_ptr no longer owns the memory. When this object
- * goes out of scope, nothing will happen.
- */
- element_type*
- release() throw()
- {
- element_type* __tmp = _M_ptr;
- _M_ptr = 0;
- return __tmp;
- }
-
- /**
- * @brief Forcibly deletes the managed object.
- * @param p A pointer (defaults to NULL).
- *
- * This object now @e owns the object pointed to by @a p. The
- * previous object has been deleted.
- */
- void
- reset(element_type* __p = 0) throw()
- {
- if (__p != _M_ptr)
- {
- delete _M_ptr;
- _M_ptr = __p;
- }
- }
-
- /**
- * @brief Automatic conversions
- *
- * These operations convert an %auto_ptr into and from an auto_ptr_ref
- * automatically as needed. This allows constructs such as
- * @code
- * auto_ptr<Derived> func_returning_auto_ptr(.....);
- * ...
- * auto_ptr<Base> ptr = func_returning_auto_ptr(.....);
- * @endcode
- */
- auto_ptr(auto_ptr_ref<element_type> __ref) throw()
- : _M_ptr(__ref._M_ptr) { }
-
- auto_ptr&
- operator=(auto_ptr_ref<element_type> __ref) throw()
- {
- if (__ref._M_ptr != this->get())
- {
- delete _M_ptr;
- _M_ptr = __ref._M_ptr;
- }
- return *this;
- }
-
- template<typename _Tp1>
- operator auto_ptr_ref<_Tp1>() throw()
- { return auto_ptr_ref<_Tp1>(this->release()); }
-
- template<typename _Tp1>
- operator auto_ptr<_Tp1>() throw()
- { return auto_ptr<_Tp1>(this->release()); }
- };
-
- // _GLIBCXX_RESOLVE_LIB_DEFECTS
- // 541. shared_ptr template assignment and void
- template<>
- class auto_ptr<void>
- {
- public:
- typedef void element_type;
- };
-
-_GLIBCXX_END_NAMESPACE
#ifdef __GXX_EXPERIMENTAL_CXX0X__
-# include <tr1/memory>
+# include <exception> // std::exception
+# include <typeinfo> // std::type_info in get_deleter
+# include <iosfwd> // std::basic_ostream
+# include <ext/atomicity.h>
+# include <ext/concurrence.h>
+# include <bits/functexcept.h>
+# include <bits/stl_function.h> // std::less
+# include <bits/uses_allocator.h>
+# include <type_traits>
+# include <functional>
+# include <debug/debug.h>
+# if _GLIBCXX_USE_DEPRECATED
+# include <backward/auto_ptr.h>
+# endif
+# include <bits/unique_ptr.h>
+# include <bits/shared_ptr.h>
+#else
+# include <backward/auto_ptr.h>
#endif
#endif /* _GLIBCXX_MEMORY */
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