// shared_ptr and weak_ptr implementation details -*- C++ -*-
-// Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+// Copyright (C) 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
/** @file bits/shared_ptr_base.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_BASE_H
#define _SHARED_PTR_BASE_H 1
-_GLIBCXX_BEGIN_NAMESPACE(std)
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ /**
+ * @brief Exception possibly thrown by @c shared_ptr.
+ * @ingroup exceptions
+ */
+ class bad_weak_ptr : public std::exception
+ {
+ public:
+ virtual char const*
+ what() const throw();
+
+ virtual ~bad_weak_ptr() throw();
+ };
+
+ // Substitute for bad_weak_ptr object in the case of -fno-exceptions.
+ inline void
+ __throw_bad_weak_ptr()
+ {
+#if __EXCEPTIONS
+ throw bad_weak_ptr();
+#else
+ __builtin_abort();
+#endif
+ }
+
+ using __gnu_cxx::_Lock_policy;
+ using __gnu_cxx::__default_lock_policy;
+ using __gnu_cxx::_S_single;
+ using __gnu_cxx::_S_mutex;
+ using __gnu_cxx::_S_atomic;
+
+ // Empty helper class except when the template argument is _S_mutex.
+ template<_Lock_policy _Lp>
+ class _Mutex_base
+ {
+ protected:
+ // The atomic policy uses fully-fenced builtins, single doesn't care.
+ enum { _S_need_barriers = 0 };
+ };
+
+ template<>
+ class _Mutex_base<_S_mutex>
+ : public __gnu_cxx::__mutex
+ {
+ protected:
+ // This policy is used when atomic builtins are not available.
+ // The replacement atomic operations might not have the necessary
+ // memory barriers.
+ enum { _S_need_barriers = 1 };
+ };
+
+ template<_Lock_policy _Lp = __default_lock_policy>
+ class _Sp_counted_base
+ : public _Mutex_base<_Lp>
+ {
+ public:
+ _Sp_counted_base()
+ : _M_use_count(1), _M_weak_count(1) { }
+
+ virtual
+ ~_Sp_counted_base() // nothrow
+ { }
+
+ // Called when _M_use_count drops to zero, to release the resources
+ // managed by *this.
+ virtual void
+ _M_dispose() = 0; // nothrow
+
+ // Called when _M_weak_count drops to zero.
+ virtual void
+ _M_destroy() // nothrow
+ { delete this; }
+
+ virtual void*
+ _M_get_deleter(const std::type_info&) = 0;
+
+ void
+ _M_add_ref_copy()
+ { __gnu_cxx::__atomic_add_dispatch(&_M_use_count, 1); }
+
+ void
+ _M_add_ref_lock();
+
+ void
+ _M_release() // nothrow
+ {
+ // Be race-detector-friendly. For more info see bits/c++config.
+ _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_use_count);
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, -1) == 1)
+ {
+ _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_use_count);
+ _M_dispose();
+ // There must be a memory barrier between dispose() and destroy()
+ // to ensure that the effects of dispose() are observed in the
+ // thread that runs destroy().
+ // See http://gcc.gnu.org/ml/libstdc++/2005-11/msg00136.html
+ if (_Mutex_base<_Lp>::_S_need_barriers)
+ {
+ _GLIBCXX_READ_MEM_BARRIER;
+ _GLIBCXX_WRITE_MEM_BARRIER;
+ }
+
+ // Be race-detector-friendly. For more info see bits/c++config.
+ _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_weak_count);
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_weak_count,
+ -1) == 1)
+ {
+ _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_weak_count);
+ _M_destroy();
+ }
+ }
+ }
+
+ void
+ _M_weak_add_ref() // nothrow
+ { __gnu_cxx::__atomic_add_dispatch(&_M_weak_count, 1); }
+
+ void
+ _M_weak_release() // nothrow
+ {
+ // Be race-detector-friendly. For more info see bits/c++config.
+ _GLIBCXX_SYNCHRONIZATION_HAPPENS_BEFORE(&_M_weak_count);
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_weak_count, -1) == 1)
+ {
+ _GLIBCXX_SYNCHRONIZATION_HAPPENS_AFTER(&_M_weak_count);
+ if (_Mutex_base<_Lp>::_S_need_barriers)
+ {
+ // See _M_release(),
+ // destroy() must observe results of dispose()
+ _GLIBCXX_READ_MEM_BARRIER;
+ _GLIBCXX_WRITE_MEM_BARRIER;
+ }
+ _M_destroy();
+ }
+ }
+
+ long
+ _M_get_use_count() const // nothrow
+ {
+ // No memory barrier is used here so there is no synchronization
+ // with other threads.
+ return const_cast<const volatile _Atomic_word&>(_M_use_count);
+ }
+
+ private:
+ _Sp_counted_base(_Sp_counted_base const&);
+ _Sp_counted_base& operator=(_Sp_counted_base const&);
+
+ _Atomic_word _M_use_count; // #shared
+ _Atomic_word _M_weak_count; // #weak + (#shared != 0)
+ };
+
+ template<>
+ inline void
+ _Sp_counted_base<_S_single>::
+ _M_add_ref_lock()
+ {
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, 1) == 0)
+ {
+ _M_use_count = 0;
+ __throw_bad_weak_ptr();
+ }
+ }
+
+ template<>
+ inline void
+ _Sp_counted_base<_S_mutex>::
+ _M_add_ref_lock()
+ {
+ __gnu_cxx::__scoped_lock sentry(*this);
+ if (__gnu_cxx::__exchange_and_add_dispatch(&_M_use_count, 1) == 0)
+ {
+ _M_use_count = 0;
+ __throw_bad_weak_ptr();
+ }
+ }
+
+ template<>
+ inline void
+ _Sp_counted_base<_S_atomic>::
+ _M_add_ref_lock()
+ {
+ // Perform lock-free add-if-not-zero operation.
+ _Atomic_word __count;
+ do
+ {
+ __count = _M_use_count;
+ if (__count == 0)
+ __throw_bad_weak_ptr();
+
+ // Replace the current counter value with the old value + 1, as
+ // long as it's not changed meanwhile.
+ }
+ while (!__sync_bool_compare_and_swap(&_M_use_count, __count,
+ __count + 1));
+ }
+
// Forward declarations.
template<typename _Tp, _Lock_policy _Lp = __default_lock_policy>
class _Sp_counted_ptr : public _Sp_counted_base<_Lp>
{
public:
+ explicit
_Sp_counted_ptr(_Ptr __p)
: _M_ptr(__p) { }
{ delete this; }
virtual void*
- _M_get_deleter(const std::type_info& __ti)
+ _M_get_deleter(const std::type_info&)
{ return 0; }
_Sp_counted_ptr(const _Sp_counted_ptr&) = delete;
_Ptr _M_ptr; // copy constructor must not throw
};
+ template<>
+ inline void
+ _Sp_counted_ptr<nullptr_t, _S_single>::_M_dispose() { }
+
+ template<>
+ inline void
+ _Sp_counted_ptr<nullptr_t, _S_mutex>::_M_dispose() { }
+
+ template<>
+ inline void
+ _Sp_counted_ptr<nullptr_t, _S_atomic>::_M_dispose() { }
+
// Support for custom deleter and/or allocator
template<typename _Ptr, typename _Deleter, typename _Alloc, _Lock_policy _Lp>
- class _Sp_counted_deleter : public _Sp_counted_ptr<_Ptr, _Lp>
+ class _Sp_counted_deleter : public _Sp_counted_base<_Lp>
{
typedef typename _Alloc::template
rebind<_Sp_counted_deleter>::other _My_alloc_type;
{
_Deleter _M_del; // copy constructor must not throw
_My_Deleter(_Deleter __d, const _Alloc& __a)
- : _My_alloc_type(__a), _M_del(__d) { }
+ : _My_alloc_type(__a), _M_del(__d) { }
};
- protected:
- typedef _Sp_counted_ptr<_Ptr, _Lp> _Base_type;
-
public:
// __d(__p) must not throw.
_Sp_counted_deleter(_Ptr __p, _Deleter __d)
- : _Base_type(__p), _M_del(__d, _Alloc()) { }
+ : _M_ptr(__p), _M_del(__d, _Alloc()) { }
// __d(__p) must not throw.
_Sp_counted_deleter(_Ptr __p, _Deleter __d, const _Alloc& __a)
- : _Base_type(__p), _M_del(__d, __a) { }
+ : _M_ptr(__p), _M_del(__d, __a) { }
virtual void
_M_dispose() // nothrow
- { _M_del._M_del(_Base_type::_M_ptr); }
+ { _M_del._M_del(_M_ptr); }
virtual void
_M_destroy() // nothrow
}
protected:
+ _Ptr _M_ptr; // copy constructor must not throw
_My_Deleter _M_del; // copy constructor must not throw
};
_Base_type;
public:
+ explicit
_Sp_counted_ptr_inplace(_Alloc __a)
: _Base_type(static_cast<_Tp*>(0), _Sp_destroy_inplace<_Tp>(), __a)
, _M_storage()
{
void* __p = &_M_storage;
::new (__p) _Tp(); // might throw
- _Base_type::_Base_type::_M_ptr = static_cast<_Tp*>(__p);
+ _Base_type::_M_ptr = static_cast<_Tp*>(__p);
}
template<typename... _Args>
{
void* __p = &_M_storage;
::new (__p) _Tp(std::forward<_Args>(__args)...); // might throw
- _Base_type::_Base_type::_M_ptr = static_cast<_Tp*>(__p);
+ _Base_type::_M_ptr = static_cast<_Tp*>(__p);
}
// Override because the allocator needs to know the dynamic type
class __shared_count
{
public:
- __shared_count() : _M_pi(0) // nothrow
+ constexpr __shared_count() : _M_pi(0) // nothrow
{ }
template<typename _Ptr>
+ explicit
__shared_count(_Ptr __p) : _M_pi(0)
{
__try
}
template<typename _Tp, typename _Alloc, typename... _Args>
- __shared_count(_Sp_make_shared_tag, _Tp*, _Alloc __a, _Args&&... __args)
+ __shared_count(_Sp_make_shared_tag, _Tp*, const _Alloc& __a,
+ _Args&&... __args)
: _M_pi(0)
{
typedef _Sp_counted_ptr_inplace<_Tp, _Alloc, _Lp> _Sp_cp_type;
}
}
-#if _GLIBCXX_DEPRECATED
+#if _GLIBCXX_USE_DEPRECATED
// Special case for auto_ptr<_Tp> to provide the strong guarantee.
template<typename _Tp>
- explicit __shared_count(std::auto_ptr<_Tp>&& __r)
+ explicit
+ __shared_count(std::auto_ptr<_Tp>&& __r)
: _M_pi(new _Sp_counted_ptr<_Tp*, _Lp>(__r.get()))
{ __r.release(); }
#endif
// Special case for unique_ptr<_Tp,_Del> to provide the strong guarantee.
template<typename _Tp, typename _Del>
- explicit __shared_count(std::unique_ptr<_Tp, _Del>&& __r)
+ explicit
+ __shared_count(std::unique_ptr<_Tp, _Del>&& __r)
: _M_pi(_S_create_from_up(std::move(__r)))
{ __r.release(); }
class __weak_count
{
public:
- __weak_count() : _M_pi(0) // nothrow
+ constexpr __weak_count() : _M_pi(0) // nothrow
{ }
__weak_count(const __shared_count<_Lp>& __r) : _M_pi(__r._M_pi) // nothrow
public:
typedef _Tp element_type;
- __shared_ptr() : _M_ptr(0), _M_refcount() // never throws
+ constexpr __shared_ptr()
+ : _M_ptr(0), _M_refcount() // never throws
{ }
template<typename _Tp1>
- explicit __shared_ptr(_Tp1* __p) : _M_ptr(__p), _M_refcount(__p)
+ explicit __shared_ptr(_Tp1* __p)
+ : _M_ptr(__p), _M_refcount(__p)
{
__glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)
- // __glibcxx_function_requires(_CompleteConcept<_Tp1*>)
+ static_assert( sizeof(_Tp1) > 0, "incomplete type" );
__enable_shared_from_this_helper(_M_refcount, __p, __p);
}
}
template<typename _Tp1, typename _Deleter, typename _Alloc>
- __shared_ptr(_Tp1* __p, _Deleter __d, const _Alloc& __a)
- : _M_ptr(__p), _M_refcount(__p, __d, __a)
+ __shared_ptr(_Tp1* __p, _Deleter __d, _Alloc __a)
+ : _M_ptr(__p), _M_refcount(__p, __d, std::move(__a))
{
__glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)
// TODO requires _Deleter CopyConstructible and __d(__p) well-formed
__enable_shared_from_this_helper(_M_refcount, __p, __p);
}
+ template<typename _Deleter>
+ __shared_ptr(nullptr_t __p, _Deleter __d)
+ : _M_ptr(0), _M_refcount(__p, __d)
+ { }
+
+ template<typename _Deleter, typename _Alloc>
+ __shared_ptr(nullptr_t __p, _Deleter __d, _Alloc __a)
+ : _M_ptr(0), _M_refcount(__p, __d, std::move(__a))
+ { }
+
template<typename _Tp1>
__shared_ptr(const __shared_ptr<_Tp1, _Lp>& __r, _Tp* __p)
: _M_ptr(__p), _M_refcount(__r._M_refcount) // never throws
// generated copy constructor, assignment, destructor are fine.
- template<typename _Tp1>
+ template<typename _Tp1, typename = typename
+ std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
__shared_ptr(const __shared_ptr<_Tp1, _Lp>& __r)
: _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount) // never throws
- { __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>) }
+ { }
__shared_ptr(__shared_ptr&& __r)
: _M_ptr(__r._M_ptr), _M_refcount() // never throws
__r._M_ptr = 0;
}
- template<typename _Tp1>
+ template<typename _Tp1, typename = typename
+ std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
__shared_ptr(__shared_ptr<_Tp1, _Lp>&& __r)
: _M_ptr(__r._M_ptr), _M_refcount() // never throws
{
- __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)
_M_refcount._M_swap(__r._M_refcount);
__r._M_ptr = 0;
}
// If an exception is thrown this constructor has no effect.
template<typename _Tp1, typename _Del>
- explicit __shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
+ __shared_ptr(std::unique_ptr<_Tp1, _Del>&& __r)
: _M_ptr(__r.get()), _M_refcount()
{
__glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)
__enable_shared_from_this_helper(_M_refcount, __tmp, __tmp);
}
-#if _GLIBCXX_DEPRECATED
+#if _GLIBCXX_USE_DEPRECATED
// Postcondition: use_count() == 1 and __r.get() == 0
template<typename _Tp1>
- explicit __shared_ptr(std::auto_ptr<_Tp1>&& __r)
+ __shared_ptr(std::auto_ptr<_Tp1>&& __r)
: _M_ptr(__r.get()), _M_refcount()
{
__glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)
- // TODO requires _Tp1 is complete, delete __r.release() well-formed
+ static_assert( sizeof(_Tp1) > 0, "incomplete type" );
_Tp1* __tmp = __r.get();
_M_refcount = __shared_count<_Lp>(std::move(__r));
__enable_shared_from_this_helper(_M_refcount, __tmp, __tmp);
}
#endif
+ /* TODO: use delegating constructor */
+ constexpr __shared_ptr(nullptr_t)
+ : _M_ptr(0), _M_refcount() // never throws
+ { }
+
template<typename _Tp1>
__shared_ptr&
operator=(const __shared_ptr<_Tp1, _Lp>& __r) // never throws
return *this;
}
-#if _GLIBCXX_DEPRECATED
+#if _GLIBCXX_USE_DEPRECATED
template<typename _Tp1>
__shared_ptr&
operator=(std::auto_ptr<_Tp1>&& __r)
template<typename _Tp1, typename _Deleter, typename _Alloc>
void
- reset(_Tp1* __p, _Deleter __d, const _Alloc& __a)
- { __shared_ptr(__p, __d, __a).swap(*this); }
+ reset(_Tp1* __p, _Deleter __d, _Alloc __a)
+ { __shared_ptr(__p, __d, std::move(__a)).swap(*this); }
// Allow class instantiation when _Tp is [cv-qual] void.
typename std::add_lvalue_reference<_Tp>::type
protected:
// 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)
: _M_ptr(), _M_refcount(__tag, (_Tp*)0, __a,
std::forward<_Args>(__args)...)
{
};
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)
: _M_ptr(), _M_refcount()
{
typedef typename _Alloc::template rebind<_Tp>::other _Alloc2;
template<typename _Tp1, _Lock_policy _Lp1, typename _Alloc,
typename... _Args>
friend __shared_ptr<_Tp1, _Lp1>
- __allocate_shared(_Alloc __a, _Args&&... __args);
+ __allocate_shared(const _Alloc& __a, _Args&&... __args);
private:
void*
const __shared_ptr<_Tp2, _Lp>& __b)
{ return __a.get() == __b.get(); }
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator==(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t)
+ { return __a.get() == nullptr; }
+
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator==(nullptr_t, const __shared_ptr<_Tp, _Lp>& __b)
+ { return nullptr == __b.get(); }
+
template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
inline bool
operator!=(const __shared_ptr<_Tp1, _Lp>& __a,
const __shared_ptr<_Tp2, _Lp>& __b)
{ return __a.get() != __b.get(); }
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator!=(const __shared_ptr<_Tp, _Lp>& __a, nullptr_t)
+ { return __a.get() != nullptr; }
+
+ template<typename _Tp, _Lock_policy _Lp>
+ inline bool
+ operator!=(nullptr_t, const __shared_ptr<_Tp, _Lp>& __b)
+ { return nullptr != __b.get(); }
+
template<typename _Tp1, typename _Tp2, _Lock_policy _Lp>
inline bool
operator<(const __shared_ptr<_Tp1, _Lp>& __a,
: public _Sp_less<__shared_ptr<_Tp, _Lp>>
{ };
- // XXX LessThanComparable<_Tp> concept should provide >, >= and <=
- template<typename _Tp, _Lock_policy _Lp>
- inline bool
- operator>(const __shared_ptr<_Tp, _Lp>& __a,
- const __shared_ptr<_Tp, _Lp>& __b)
- { return __a.get() > __b.get(); }
-
- template<typename _Tp, _Lock_policy _Lp>
- inline bool
- operator>=(const __shared_ptr<_Tp, _Lp>& __a,
- const __shared_ptr<_Tp, _Lp>& __b)
- { return __a.get() >= __b.get(); }
-
- template<typename _Tp, _Lock_policy _Lp>
- inline bool
- operator<=(const __shared_ptr<_Tp, _Lp>& __a,
- const __shared_ptr<_Tp, _Lp>& __b)
- { return __a.get() <= __b.get(); }
-
// 2.2.3.8 shared_ptr specialized algorithms.
template<typename _Tp, _Lock_policy _Lp>
inline void
public:
typedef _Tp element_type;
- __weak_ptr() : _M_ptr(0), _M_refcount() // never throws
+ constexpr __weak_ptr()
+ : _M_ptr(0), _M_refcount() // never throws
{ }
// Generated copy constructor, assignment, destructor are fine.
//
// It is not possible to avoid spurious access violations since
// in multithreaded programs __r._M_ptr may be invalidated at any point.
- template<typename _Tp1>
+ template<typename _Tp1, typename = typename
+ std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
__weak_ptr(const __weak_ptr<_Tp1, _Lp>& __r)
: _M_refcount(__r._M_refcount) // never throws
- {
- __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>)
- _M_ptr = __r.lock().get();
- }
+ { _M_ptr = __r.lock().get(); }
- template<typename _Tp1>
+ template<typename _Tp1, typename = typename
+ std::enable_if<std::is_convertible<_Tp1*, _Tp*>::value>::type>
__weak_ptr(const __shared_ptr<_Tp1, _Lp>& __r)
: _M_ptr(__r._M_ptr), _M_refcount(__r._M_refcount) // never throws
- { __glibcxx_function_requires(_ConvertibleConcept<_Tp1*, _Tp*>) }
+ { }
template<typename _Tp1>
__weak_ptr&
_M_refcount._M_swap(__s._M_refcount);
}
- // Comparisons
- template<typename _Tp1>
- bool operator<(const __weak_ptr<_Tp1, _Lp>&) const = delete;
-
- template<typename _Tp1>
- bool operator<=(const __weak_ptr<_Tp1, _Lp>&) const = delete;
-
- template<typename _Tp1>
- bool operator>(const __weak_ptr<_Tp1, _Lp>&) const = delete;
-
- template<typename _Tp1>
- bool operator>=(const __weak_ptr<_Tp1, _Lp>&) const = delete;
-
private:
// Used by __enable_shared_from_this.
void
class __enable_shared_from_this
{
protected:
- __enable_shared_from_this() { }
+ constexpr __enable_shared_from_this() { }
__enable_shared_from_this(const __enable_shared_from_this&) { }
template<typename _Tp, _Lock_policy _Lp, typename _Alloc, typename... _Args>
inline __shared_ptr<_Tp, _Lp>
- __allocate_shared(_Alloc __a, _Args&&... __args)
+ __allocate_shared(const _Alloc& __a, _Args&&... __args)
{
- return __shared_ptr<_Tp, _Lp>(_Sp_make_shared_tag(),
- std::forward<_Alloc>(__a), std::forward<_Args>(__args)...);
+ return __shared_ptr<_Tp, _Lp>(_Sp_make_shared_tag(), __a,
+ std::forward<_Args>(__args)...);
}
template<typename _Tp, _Lock_policy _Lp, typename... _Args>
std::forward<_Args>(__args)...);
}
-_GLIBCXX_END_NAMESPACE
+ /// std::hash specialization for __shared_ptr.
+ template<typename _Tp, _Lock_policy _Lp>
+ struct hash<__shared_ptr<_Tp, _Lp>>
+ : public std::unary_function<__shared_ptr<_Tp, _Lp>, size_t>
+ {
+ size_t
+ operator()(const __shared_ptr<_Tp, _Lp>& __s) const
+ { return std::hash<_Tp*>()(__s.get()); }
+ };
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
#endif // _SHARED_PTR_BASE_H
OSDN Git Service
