// shared_ptr and weak_ptr implementation -*- C++ -*-
-// Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+// Copyright (C) 2007-2012 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
/** @file bits/shared_ptr.h
* This is an internal header file, included by other library headers.
- * You should not attempt to use it directly.
+ * Do not attempt to use it directly. @headername{memory}
*/
#ifndef _SHARED_PTR_H
#include <bits/shared_ptr_base.h>
-_GLIBCXX_BEGIN_NAMESPACE(std)
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
/**
* @addtogroup pointer_abstractions
/// 2.2.3.7 shared_ptr I/O
template<typename _Ch, typename _Tr, typename _Tp, _Lock_policy _Lp>
- std::basic_ostream<_Ch, _Tr>&
+ inline std::basic_ostream<_Ch, _Tr>&
operator<<(std::basic_ostream<_Ch, _Tr>& __os,
const __shared_ptr<_Tp, _Lp>& __p)
{
/// 2.2.3.10 shared_ptr get_deleter (experimental)
template<typename _Del, typename _Tp, _Lock_policy _Lp>
inline _Del*
- get_deleter(const __shared_ptr<_Tp, _Lp>& __p)
+ get_deleter(const __shared_ptr<_Tp, _Lp>& __p) noexcept
{
#ifdef __GXX_RTTI
return static_cast<_Del*>(__p._M_get_deleter(typeid(_Del)));
* @brief Construct an empty %shared_ptr.
* @post use_count()==0 && get()==0
*/
- shared_ptr() : __shared_ptr<_Tp>() { }
+ constexpr shared_ptr() noexcept
+ : __shared_ptr<_Tp>() { }
+
+ shared_ptr(const shared_ptr&) noexcept = default;
/**
* @brief Construct a %shared_ptr that owns the pointer @a __p.
* @throw std::bad_alloc, in which case @c delete @a __p is called.
*/
template<typename _Tp1>
- explicit shared_ptr(_Tp1* __p) : __shared_ptr<_Tp>(__p) { }
+ explicit shared_ptr(_Tp1* __p)
+ : __shared_ptr<_Tp>(__p) { }
/**
* @brief Construct a %shared_ptr that owns the pointer @a __p
*
* __shared_ptr will release __p by calling __d(__p)
*/
- template<typename _Tp1, typename _Deleter>
- shared_ptr(_Tp1* __p, _Deleter __d) : __shared_ptr<_Tp>(__p, __d) { }
+ template<typename _Tp1, typename _Deleter>
+ shared_ptr(_Tp1* __p, _Deleter __d)
+ : __shared_ptr<_Tp>(__p, __d) { }
+
+ /**
+ * @brief Construct a %shared_ptr that owns a null pointer
+ * and the deleter @a __d.
+ * @param __p A null pointer constant.
+ * @param __d A deleter.
+ * @post use_count() == 1 && get() == __p
+ * @throw std::bad_alloc, in which case @a __d(__p) is called.
+ *
+ * Requirements: _Deleter's copy constructor and destructor must
+ * not throw
+ *
+ * The last owner will call __d(__p)
+ */
+ template<typename _Deleter>
+ shared_ptr(nullptr_t __p, _Deleter __d)
+ : __shared_ptr<_Tp>(__p, __d) { }
/**
* @brief Construct a %shared_ptr that owns the pointer @a __p
* __shared_ptr will release __p by calling __d(__p)
*/
template<typename _Tp1, typename _Deleter, typename _Alloc>
- shared_ptr(_Tp1* __p, _Deleter __d, const _Alloc& __a)
- : __shared_ptr<_Tp>(__p, __d, __a) { }
+ shared_ptr(_Tp1* __p, _Deleter __d, _Alloc __a)
+ : __shared_ptr<_Tp>(__p, __d, std::move(__a)) { }
+
+ /**
+ * @brief Construct a %shared_ptr that owns a null pointer
+ * and the deleter @a __d.
+ * @param __p A null pointer constant.
+ * @param __d A deleter.
+ * @param __a An allocator.
+ * @post use_count() == 1 && get() == __p
+ * @throw std::bad_alloc, in which case @a __d(__p) is called.
+ *
+ * Requirements: _Deleter's copy constructor and destructor must
+ * not throw _Alloc's copy constructor and destructor must not
+ * throw.
+ *
+ * The last owner will call __d(__p)
+ */
+ template<typename _Deleter, typename _Alloc>
+ shared_ptr(nullptr_t __p, _Deleter __d, _Alloc __a)
+ : __shared_ptr<_Tp>(__p, __d, std::move(__a)) { }
// Aliasing constructor
* @endcode
*/
template<typename _Tp1>
- shared_ptr(const shared_ptr<_Tp1>& __r, _Tp* __p)
+ shared_ptr(const shared_ptr<_Tp1>& __r, _Tp* __p) noexcept
: __shared_ptr<_Tp>(__r, __p) { }
/**
* @param __r A %shared_ptr.
* @post get() == __r.get() && use_count() == __r.use_count()
*/
- template<typename _Tp1>
- shared_ptr(const shared_ptr<_Tp1>& __r) : __shared_ptr<_Tp>(__r) { }
+ template<typename _Tp1, typename = typename
+ std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
+ shared_ptr(const shared_ptr<_Tp1>& __r) noexcept
+ : __shared_ptr<_Tp>(__r) { }
/**
* @brief Move-constructs a %shared_ptr instance from @a __r.
* @param __r A %shared_ptr rvalue.
* @post *this contains the old value of @a __r, @a __r is empty.
*/
- shared_ptr(shared_ptr&& __r)
+ shared_ptr(shared_ptr&& __r) noexcept
: __shared_ptr<_Tp>(std::move(__r)) { }
/**
* @param __r A %shared_ptr rvalue.
* @post *this contains the old value of @a __r, @a __r is empty.
*/
- template<typename _Tp1>
- shared_ptr(shared_ptr<_Tp1>&& __r)
+ template<typename _Tp1, typename = typename
+ std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
+ shared_ptr(shared_ptr<_Tp1>&& __r) noexcept
: __shared_ptr<_Tp>(std::move(__r)) { }
/**
explicit shared_ptr(const weak_ptr<_Tp1>& __r)
: __shared_ptr<_Tp>(__r) { }
-#if _GLIBCXX_DEPRECATED
+#if _GLIBCXX_USE_DEPRECATED
template<typename _Tp1>
- explicit
- shared_ptr(std::auto_ptr<_Tp1>&& __r)
- : __shared_ptr<_Tp>(std::move(__r)) { }
+ shared_ptr(std::auto_ptr<_Tp1>&& __r);
#endif
template<typename _Tp1, typename _Del>
- explicit shared_ptr(const std::unique_ptr<_Tp1, _Del>&) = delete;
-
- template<typename _Tp1, typename _Del>
- explicit shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
+ shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
: __shared_ptr<_Tp>(std::move(__r)) { }
+ /**
+ * @brief Construct an empty %shared_ptr.
+ * @param __p A null pointer constant.
+ * @post use_count() == 0 && get() == nullptr
+ */
+ constexpr shared_ptr(nullptr_t __p) noexcept
+ : __shared_ptr<_Tp>(__p) { }
+
+ shared_ptr& operator=(const shared_ptr&) noexcept = default;
+
template<typename _Tp1>
shared_ptr&
- operator=(const shared_ptr<_Tp1>& __r) // never throws
+ operator=(const shared_ptr<_Tp1>& __r) noexcept
{
this->__shared_ptr<_Tp>::operator=(__r);
return *this;
}
-#if _GLIBCXX_DEPRECATED
+#if _GLIBCXX_USE_DEPRECATED
template<typename _Tp1>
shared_ptr&
operator=(std::auto_ptr<_Tp1>&& __r)
#endif
shared_ptr&
- operator=(shared_ptr&& __r)
+ operator=(shared_ptr&& __r) noexcept
{
this->__shared_ptr<_Tp>::operator=(std::move(__r));
return *this;
template<class _Tp1>
shared_ptr&
- operator=(shared_ptr<_Tp1>&& __r)
+ operator=(shared_ptr<_Tp1>&& __r) noexcept
{
this->__shared_ptr<_Tp>::operator=(std::move(__r));
return *this;
template<typename _Tp1, typename _Del>
shared_ptr&
- operator=(const std::unique_ptr<_Tp1, _Del>& __r) = delete;
-
- template<typename _Tp1, typename _Del>
- shared_ptr&
operator=(std::unique_ptr<_Tp1, _Del>&& __r)
{
this->__shared_ptr<_Tp>::operator=(std::move(__r));
private:
// This constructor is non-standard, it is used by allocate_shared.
template<typename _Alloc, typename... _Args>
- shared_ptr(_Sp_make_shared_tag __tag, _Alloc __a, _Args&&... __args)
+ shared_ptr(_Sp_make_shared_tag __tag, const _Alloc& __a,
+ _Args&&... __args)
: __shared_ptr<_Tp>(__tag, __a, std::forward<_Args>(__args)...)
{ }
template<typename _Tp1, typename _Alloc, typename... _Args>
friend shared_ptr<_Tp1>
- allocate_shared(_Alloc __a, _Args&&... __args);
+ allocate_shared(const _Alloc& __a, _Args&&... __args);
};
- // 20.8.13.2.7 shared_ptr comparisons
+ // 20.7.2.2.7 shared_ptr comparisons
template<typename _Tp1, typename _Tp2>
inline bool
- operator==(const shared_ptr<_Tp1>& __a, const shared_ptr<_Tp2>& __b)
+ operator==(const shared_ptr<_Tp1>& __a,
+ const shared_ptr<_Tp2>& __b) noexcept
{ return __a.get() == __b.get(); }
+ template<typename _Tp>
+ inline bool
+ operator==(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
+ { return !__a; }
+
+ template<typename _Tp>
+ inline bool
+ operator==(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
+ { return !__a; }
+
template<typename _Tp1, typename _Tp2>
inline bool
- operator!=(const shared_ptr<_Tp1>& __a, const shared_ptr<_Tp2>& __b)
+ operator!=(const shared_ptr<_Tp1>& __a,
+ const shared_ptr<_Tp2>& __b) noexcept
{ return __a.get() != __b.get(); }
+ template<typename _Tp>
+ inline bool
+ operator!=(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
+ { return (bool)__a; }
+
+ template<typename _Tp>
+ inline bool
+ operator!=(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
+ { return (bool)__a; }
+
+ template<typename _Tp1, typename _Tp2>
+ inline bool
+ operator<(const shared_ptr<_Tp1>& __a,
+ const shared_ptr<_Tp2>& __b) noexcept
+ {
+ typedef typename std::common_type<_Tp1*, _Tp2*>::type _CT;
+ return std::less<_CT>()(__a.get(), __b.get());
+ }
+
+ template<typename _Tp>
+ inline bool
+ operator<(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
+ { return std::less<_Tp*>()(__a.get(), nullptr); }
+
+ template<typename _Tp>
+ inline bool
+ operator<(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
+ { return std::less<_Tp*>()(nullptr, __a.get()); }
+
+ template<typename _Tp1, typename _Tp2>
+ inline bool
+ operator<=(const shared_ptr<_Tp1>& __a,
+ const shared_ptr<_Tp2>& __b) noexcept
+ { return !(__b < __a); }
+
+ template<typename _Tp>
+ inline bool
+ operator<=(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
+ { return !(nullptr < __a); }
+
+ template<typename _Tp>
+ inline bool
+ operator<=(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
+ { return !(__a < nullptr); }
+
+ template<typename _Tp1, typename _Tp2>
+ inline bool
+ operator>(const shared_ptr<_Tp1>& __a,
+ const shared_ptr<_Tp2>& __b) noexcept
+ { return (__b < __a); }
+
+ template<typename _Tp>
+ inline bool
+ operator>(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
+ { return std::less<_Tp*>()(nullptr, __a.get()); }
+
+ template<typename _Tp>
+ inline bool
+ operator>(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
+ { return std::less<_Tp*>()(__a.get(), nullptr); }
+
template<typename _Tp1, typename _Tp2>
inline bool
- operator<(const shared_ptr<_Tp1>& __a, const shared_ptr<_Tp2>& __b)
- { return __a.get() < __b.get(); }
+ operator>=(const shared_ptr<_Tp1>& __a,
+ const shared_ptr<_Tp2>& __b) noexcept
+ { return !(__a < __b); }
+
+ template<typename _Tp>
+ inline bool
+ operator>=(const shared_ptr<_Tp>& __a, nullptr_t) noexcept
+ { return !(__a < nullptr); }
+
+ template<typename _Tp>
+ inline bool
+ operator>=(nullptr_t, const shared_ptr<_Tp>& __a) noexcept
+ { return !(nullptr < __a); }
template<typename _Tp>
struct less<shared_ptr<_Tp>> : public _Sp_less<shared_ptr<_Tp>>
{ };
- // 20.8.13.2.9 shared_ptr specialized algorithms.
+ // 20.7.2.2.8 shared_ptr specialized algorithms.
template<typename _Tp>
inline void
- swap(shared_ptr<_Tp>& __a, shared_ptr<_Tp>& __b)
+ swap(shared_ptr<_Tp>& __a, shared_ptr<_Tp>& __b) noexcept
{ __a.swap(__b); }
- // 20.8.13.2.10 shared_ptr casts.
+ // 20.7.2.2.9 shared_ptr casts.
template<typename _Tp, typename _Tp1>
inline shared_ptr<_Tp>
- static_pointer_cast(const shared_ptr<_Tp1>& __r)
+ static_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
{ return shared_ptr<_Tp>(__r, static_cast<_Tp*>(__r.get())); }
template<typename _Tp, typename _Tp1>
inline shared_ptr<_Tp>
- const_pointer_cast(const shared_ptr<_Tp1>& __r)
+ const_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
{ return shared_ptr<_Tp>(__r, const_cast<_Tp*>(__r.get())); }
template<typename _Tp, typename _Tp1>
inline shared_ptr<_Tp>
- dynamic_pointer_cast(const shared_ptr<_Tp1>& __r)
+ dynamic_pointer_cast(const shared_ptr<_Tp1>& __r) noexcept
{
if (_Tp* __p = dynamic_cast<_Tp*>(__r.get()))
return shared_ptr<_Tp>(__r, __p);
class weak_ptr : public __weak_ptr<_Tp>
{
public:
- weak_ptr() : __weak_ptr<_Tp>() { }
+ constexpr weak_ptr() noexcept
+ : __weak_ptr<_Tp>() { }
- template<typename _Tp1>
- weak_ptr(const weak_ptr<_Tp1>& __r)
+ template<typename _Tp1, typename = typename
+ std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
+ weak_ptr(const weak_ptr<_Tp1>& __r) noexcept
: __weak_ptr<_Tp>(__r) { }
- template<typename _Tp1>
- weak_ptr(const shared_ptr<_Tp1>& __r)
+ template<typename _Tp1, typename = typename
+ std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
+ weak_ptr(const shared_ptr<_Tp1>& __r) noexcept
: __weak_ptr<_Tp>(__r) { }
template<typename _Tp1>
weak_ptr&
- operator=(const weak_ptr<_Tp1>& __r) // never throws
+ operator=(const weak_ptr<_Tp1>& __r) noexcept
{
this->__weak_ptr<_Tp>::operator=(__r);
return *this;
template<typename _Tp1>
weak_ptr&
- operator=(const shared_ptr<_Tp1>& __r) // never throws
+ operator=(const shared_ptr<_Tp1>& __r) noexcept
{
this->__weak_ptr<_Tp>::operator=(__r);
return *this;
}
shared_ptr<_Tp>
- lock() const // never throws
+ lock() const noexcept
{
#ifdef __GTHREADS
if (this->expired())
return this->expired() ? shared_ptr<_Tp>() : shared_ptr<_Tp>(*this);
#endif
}
-
- // Comparisons
- template<typename _Tp1>
- bool operator<(const weak_ptr<_Tp1>&) const = delete;
- template<typename _Tp1>
- bool operator<=(const weak_ptr<_Tp1>&) const = delete;
- template<typename _Tp1>
- bool operator>(const weak_ptr<_Tp1>&) const = delete;
- template<typename _Tp1>
- bool operator>=(const weak_ptr<_Tp1>&) const = delete;
};
- // 20.8.13.3.7 weak_ptr specialized algorithms.
+ // 20.7.2.3.6 weak_ptr specialized algorithms.
template<typename _Tp>
inline void
- swap(weak_ptr<_Tp>& __a, weak_ptr<_Tp>& __b)
+ swap(weak_ptr<_Tp>& __a, weak_ptr<_Tp>& __b) noexcept
{ __a.swap(__b); }
class enable_shared_from_this
{
protected:
- enable_shared_from_this() { }
+ constexpr enable_shared_from_this() noexcept { }
- enable_shared_from_this(const enable_shared_from_this&) { }
+ enable_shared_from_this(const enable_shared_from_this&) noexcept { }
enable_shared_from_this&
- operator=(const enable_shared_from_this&)
+ operator=(const enable_shared_from_this&) noexcept
{ return *this; }
~enable_shared_from_this() { }
private:
template<typename _Tp1>
void
- _M_weak_assign(_Tp1* __p, const __shared_count<>& __n) const
+ _M_weak_assign(_Tp1* __p, const __shared_count<>& __n) const noexcept
{ _M_weak_this._M_assign(__p, __n); }
template<typename _Tp1>
friend void
__enable_shared_from_this_helper(const __shared_count<>& __pn,
const enable_shared_from_this* __pe,
- const _Tp1* __px)
+ const _Tp1* __px) noexcept
{
if (__pe != 0)
__pe->_M_weak_assign(const_cast<_Tp1*>(__px), __pn);
*/
template<typename _Tp, typename _Alloc, typename... _Args>
inline shared_ptr<_Tp>
- allocate_shared(_Alloc __a, _Args&&... __args)
+ allocate_shared(const _Alloc& __a, _Args&&... __args)
{
- return shared_ptr<_Tp>(_Sp_make_shared_tag(), std::forward<_Alloc>(__a),
+ return shared_ptr<_Tp>(_Sp_make_shared_tag(), __a,
std::forward<_Args>(__args)...);
}
make_shared(_Args&&... __args)
{
typedef typename std::remove_const<_Tp>::type _Tp_nc;
- return allocate_shared<_Tp>(std::allocator<_Tp_nc>(),
- std::forward<_Args>(__args)...);
+ return std::allocate_shared<_Tp>(std::allocator<_Tp_nc>(),
+ std::forward<_Args>(__args)...);
}
+ /// std::hash specialization for shared_ptr.
+ template<typename _Tp>
+ struct hash<shared_ptr<_Tp>>
+ : public __hash_base<size_t, shared_ptr<_Tp>>
+ {
+ size_t
+ operator()(const shared_ptr<_Tp>& __s) const noexcept
+ { return std::hash<_Tp*>()(__s.get()); }
+ };
+
// @} group pointer_abstractions
-_GLIBCXX_END_NAMESPACE
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
#endif // _SHARED_PTR_H
projects / platform / upstream / gcc.git / blobdiff