fix move ctor/assignment

This commit is contained in:
Günter Obiltschnig 2020-01-21 19:58:12 +01:00
parent 18adb1e43b
commit eeb64cc340
4 changed files with 50 additions and 48 deletions

View File

@ -47,7 +47,7 @@ class AutoPtr
/// AutoPtr works in the following way:
/// If an AutoPtr is assigned an ordinary pointer to
/// an object (via the constructor or the assignment operator),
/// it takes ownership of the object and the object's reference
/// it takes ownership of the object and the object's reference
/// count remains unchanged.
/// If the AutoPtr is assigned another AutoPtr, the
/// object's reference count is incremented by one by
@ -84,7 +84,7 @@ public:
ptr._ptr = nullptr;
}
template <class Other>
template <class Other>
AutoPtr(const AutoPtr<Other>& ptr): _ptr(const_cast<Other*>(ptr.get()))
{
if (_ptr) _ptr->duplicate();
@ -94,7 +94,7 @@ public:
{
if (_ptr) _ptr->release();
}
AutoPtr& assign(C* ptr)
{
if (_ptr != ptr)
@ -115,7 +115,7 @@ public:
}
return *this;
}
AutoPtr& assign(const AutoPtr& ptr)
{
if (&ptr != this)
@ -126,8 +126,8 @@ public:
}
return *this;
}
template <class Other>
template <class Other>
AutoPtr& assign(const AutoPtr<Other>& ptr)
{
if (ptr.get() != _ptr)
@ -182,12 +182,12 @@ public:
AutoPtr& operator = (AutoPtr&& ptr) noexcept
{
if (_ptr) _ptr->release();
_ptr = std::move(ptr._ptr);
_ptr = ptr._ptr;
ptr._ptr = nullptr;
return *this;
}
template <class Other>
template <class Other>
AutoPtr& operator = (const AutoPtr<Other>& ptr)
{
return assign<Other>(ptr);
@ -197,8 +197,8 @@ public:
{
std::swap(_ptr, ptr._ptr);
}
template <class Other>
template <class Other>
AutoPtr<Other> cast() const
/// Casts the AutoPtr via a dynamic cast to the given type.
/// Returns an AutoPtr containing NULL if the cast fails.
@ -211,7 +211,7 @@ public:
return AutoPtr<Other>(pOther, true);
}
template <class Other>
template <class Other>
AutoPtr<Other> unsafeCast() const
/// Casts the AutoPtr via a static cast to the given type.
/// Example: (assume class Sub: public Super)
@ -269,12 +269,12 @@ public:
{
return _ptr;
}
operator const C* () const
{
return _ptr;
}
bool operator ! () const
{
return _ptr == nullptr;
@ -284,7 +284,7 @@ public:
{
return _ptr == nullptr;
}
C* duplicate()
{
if (_ptr) _ptr->duplicate();

View File

@ -123,7 +123,7 @@ public:
Nullable& assign(C&& value)
/// Assigns a value to the Nullable.
{
_value = value;
_value = std::move(value);
_isNull = false;
return *this;
}
@ -152,7 +152,7 @@ public:
Nullable& operator = (C&& value)
/// Move-assigns a value to the Nullable.
{
return assign(value);
return assign(std::move(value));
}
Nullable& operator = (const Nullable& other)

View File

@ -105,7 +105,7 @@ public:
Optional& assign(C&& value)
/// Moves a value into the Optional.
{
_value = value;
_value = std::move(value);
_isSpecified = true;
return *this;
}
@ -125,7 +125,7 @@ public:
Optional& operator = (C&& value)
{
return assign(value);
return assign(std::move(value));
}
Optional& operator = (const Optional& other)

View File

@ -44,7 +44,7 @@ public:
{
return --_cnt;
}
int referenceCount() const
{
return _cnt.value();
@ -61,7 +61,7 @@ class ReleasePolicy
/// simply uses the delete operator to delete an object.
{
public:
static void release(C* pObj)
static void release(C* pObj) noexcept
/// Delete the object.
/// Note that pObj can be nullptr.
{
@ -75,7 +75,7 @@ class ReleaseArrayPolicy
/// The release policy for SharedPtr holding arrays.
{
public:
static void release(C* pObj)
static void release(C* pObj) noexcept
/// Delete the object.
/// Note that pObj can be nullptr.
{
@ -94,11 +94,11 @@ class SharedPtr
/// can be used with any class. For this to work, a
/// SharedPtr manages a reference count for the object
/// it manages.
///
///
/// SharedPtr works in the following way:
/// If an SharedPtr is assigned an ordinary pointer to
/// an object (via the constructor or the assignment operator),
/// it takes ownership of the object and the object's reference
/// it takes ownership of the object and the object's reference
/// count is initialized to one.
/// If the SharedPtr is assigned another SharedPtr, the
/// object's reference count is incremented by one.
@ -115,33 +115,41 @@ class SharedPtr
public:
typedef C Type;
SharedPtr(): _pCounter(nullptr), _ptr(nullptr)
SharedPtr():
_pCounter(nullptr),
_ptr(nullptr)
{
}
SharedPtr(C* ptr)
try:
_pCounter(ptr ? new RC : nullptr),
_pCounter(ptr ? new RC : nullptr),
_ptr(ptr)
{
}
catch (...)
catch (...)
{
RP::release(ptr);
}
template <class Other, class OtherRP>
SharedPtr(const SharedPtr<Other, RC, OtherRP>& ptr): _pCounter(ptr._pCounter), _ptr(const_cast<Other*>(ptr.get()))
template <class Other, class OtherRP>
SharedPtr(const SharedPtr<Other, RC, OtherRP>& ptr):
_pCounter(ptr._pCounter),
_ptr(const_cast<Other*>(ptr.get()))
{
if (_pCounter) _pCounter->duplicate();
}
SharedPtr(const SharedPtr& ptr): _pCounter(ptr._pCounter), _ptr(ptr._ptr)
SharedPtr(const SharedPtr& ptr):
_pCounter(ptr._pCounter),
_ptr(ptr._ptr)
{
if (_pCounter) _pCounter->duplicate();
}
SharedPtr(SharedPtr&& ptr) noexcept: _pCounter(std::move(ptr._pCounter)), _ptr(std::move(ptr._ptr))
SharedPtr(SharedPtr&& ptr) noexcept:
_pCounter(ptr._pCounter),
_ptr(ptr._ptr)
{
ptr._pCounter = nullptr;
ptr._ptr = nullptr;
@ -149,14 +157,7 @@ public:
~SharedPtr()
{
try
{
release();
}
catch (...)
{
poco_unexpected();
}
release();
}
SharedPtr& assign(C* ptr)
@ -168,7 +169,7 @@ public:
}
return *this;
}
SharedPtr& assign(const SharedPtr& ptr)
{
if (&ptr != this)
@ -178,7 +179,7 @@ public:
}
return *this;
}
template <class Other, class OtherRP>
SharedPtr& assign(const SharedPtr<Other, RC, OtherRP>& ptr)
{
@ -223,9 +224,10 @@ public:
SharedPtr& operator = (SharedPtr&& ptr) noexcept
{
_ptr = std::move(ptr._ptr);
_pCounter = std::move(ptr._pCounter);
release();
_ptr = ptr._ptr;
ptr._ptr = nullptr;
_pCounter = ptr._pCounter;
ptr._pCounter = nullptr;
return *this;
}
@ -242,7 +244,7 @@ public:
std::swap(_pCounter, ptr._pCounter);
}
template <class Other>
template <class Other>
SharedPtr<Other, RC, RP> cast() const
/// Casts the SharedPtr via a dynamic cast to the given type.
/// Returns an SharedPtr containing NULL if the cast fails.
@ -257,7 +259,7 @@ public:
return SharedPtr<Other, RC, RP>();
}
template <class Other>
template <class Other>
SharedPtr<Other, RC, RP> unsafeCast() const
/// Casts the SharedPtr via a static cast to the given type.
/// Example: (assume class Sub: public Super)
@ -303,7 +305,7 @@ public:
{
return _ptr;
}
operator const C* () const
{
return _ptr;
@ -408,7 +410,7 @@ public:
{
return get() >= ptr;
}
int referenceCount() const
{
return _pCounter ? _pCounter->referenceCount() : 0;
@ -423,7 +425,7 @@ private:
return _ptr;
}
void release()
void release() noexcept
{
if (_pCounter && _pCounter->release() == 0)
{