New BWeakReferenceable API.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42763 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Clemens Zeidler
parent
e40c00685c
commit
cf53ed6f64
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@ -11,38 +11,35 @@
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namespace BPrivate {
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template<typename Type> class WeakReferenceable;
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template<typename Type>
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class BWeakReferenceable;
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class WeakPointer : public BReferenceable {
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public:
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Type* Get();
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WeakPointer(BWeakReferenceable* object);
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~WeakPointer();
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BWeakReferenceable* Get();
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bool Put();
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int32 UseCount() const;
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private:
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friend class WeakReferenceable<Type>;
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WeakPointer(Type* object);
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~WeakPointer();
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private:
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void _GetUnchecked();
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void GetUnchecked();
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private:
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vint32 fUseCount;
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Type* fObject;
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BWeakReferenceable* fObject;
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};
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template<typename Type>
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class WeakReferenceable {
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class BWeakReferenceable {
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public:
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WeakReferenceable(Type* object);
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~WeakReferenceable();
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BWeakReferenceable();
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virtual ~BWeakReferenceable();
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void AcquireReference()
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{ fPointer->_GetUnchecked(); }
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{ fPointer->GetUnchecked(); }
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bool ReleaseReference()
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{ return fPointer->Put(); }
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@ -50,55 +47,43 @@ public:
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int32 CountReferences() const
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{ return fPointer->UseCount(); }
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WeakPointer<Type>* GetWeakPointer();
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protected:
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WeakPointer<Type>* fPointer;
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WeakPointer* GetWeakPointer();
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private:
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WeakPointer* fPointer;
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};
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template<typename Type>
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class WeakReference {
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class BWeakReference {
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public:
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WeakReference()
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BWeakReference()
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:
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fPointer(NULL),
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fObject(NULL)
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fPointer(NULL)
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{
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}
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WeakReference(Type* object)
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BWeakReference(Type* object)
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:
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fPointer(NULL),
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fObject(NULL)
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fPointer(NULL)
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{
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SetTo(object);
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}
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WeakReference(WeakPointer<Type>& other)
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BWeakReference(const BWeakReference<Type>& other)
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:
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fPointer(NULL),
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fObject(NULL)
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{
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SetTo(&other);
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}
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WeakReference(WeakPointer<Type>* other)
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:
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fPointer(NULL),
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fObject(NULL)
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fPointer(NULL)
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{
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SetTo(other);
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}
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WeakReference(const WeakReference<Type>& other)
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BWeakReference(const BReference<Type>& other)
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:
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fPointer(NULL),
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fObject(NULL)
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fPointer(NULL)
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{
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SetTo(other.fPointer);
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SetTo(other);
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}
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~WeakReference()
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~BWeakReference()
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{
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Unset();
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}
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@ -107,63 +92,51 @@ public:
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{
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Unset();
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if (object != NULL) {
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if (object != NULL)
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fPointer = object->GetWeakPointer();
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fObject = fPointer->Get();
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}
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}
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void SetTo(WeakPointer<Type>* pointer)
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void SetTo(const BWeakReference<Type>& other)
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{
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Unset();
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if (pointer != NULL) {
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fPointer = pointer;
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if (other.fPointer) {
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fPointer = other.fPointer;
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fPointer->AcquireReference();
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fObject = pointer->Get();
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}
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}
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void SetTo(const BReference<Type>& other)
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{
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SetTo(other.Get());
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}
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void Unset()
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{
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if (fPointer != NULL) {
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if (fObject != NULL) {
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fPointer->Put();
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fObject = NULL;
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}
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fPointer->ReleaseReference();
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fPointer = NULL;
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}
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}
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Type* Get() const
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bool IsAlive()
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{
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return fObject;
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if (fPointer == NULL)
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return false;
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Type* object = static_cast<Type*>(fPointer->Get());
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if (object == NULL)
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return false;
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fPointer->Put();
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return true;
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}
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Type* Detach()
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BReference<Type> GetReference()
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{
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Type* object = fObject;
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Unset();
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return object;
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Type* object = static_cast<Type*>(fPointer->Get());
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return BReference<Type>(object, true);
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}
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Type& operator*() const
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{
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return *fObject;
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}
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operator Type*() const
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{
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return fObject;
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}
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Type* operator->() const
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{
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return fObject;
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}
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WeakReference& operator=(const WeakReference<Type>& other)
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BWeakReference& operator=(const BWeakReference<Type>& other)
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{
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if (this == &other)
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return *this;
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@ -172,46 +145,59 @@ public:
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return *this;
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}
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WeakReference& operator=(const Type& other)
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BWeakReference& operator=(const Type& other)
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{
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SetTo(&other);
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return *this;
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}
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WeakReference& operator=(WeakPointer<Type>& other)
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{
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SetTo(&other);
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return *this;
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}
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WeakReference& operator=(WeakPointer<Type>* other)
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BWeakReference& operator=(Type* other)
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{
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SetTo(other);
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return *this;
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}
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bool operator==(const WeakReference<Type>& other) const
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BWeakReference& operator=(const BReference<Type>& other)
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{
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SetTo(other.Get());
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return *this;
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}
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bool operator==(const BWeakReference<Type>& other) const
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{
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return fPointer == other.fPointer;
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}
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bool operator!=(const WeakReference<Type>& other) const
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bool operator!=(const BWeakReference<Type>& other) const
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{
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return fPointer != other.fPointer;
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}
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private:
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WeakPointer<Type>* fPointer;
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Type* fObject;
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WeakPointer* fPointer;
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};
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// #pragma mark -
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template<typename Type>
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inline Type*
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WeakPointer<Type>::Get()
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inline
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WeakPointer::WeakPointer(BWeakReferenceable* object)
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:
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fUseCount(1),
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fObject(object)
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{
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}
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inline
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WeakPointer::~WeakPointer()
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{
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}
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inline BWeakReferenceable*
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WeakPointer::Get()
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{
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int32 count = -11;
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@ -225,9 +211,8 @@ WeakPointer<Type>::Get()
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}
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template<typename Type>
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inline bool
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WeakPointer<Type>::Put()
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WeakPointer::Put()
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{
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if (atomic_add(&fUseCount, -1) == 1) {
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delete fObject;
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@ -238,34 +223,15 @@ WeakPointer<Type>::Put()
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}
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template<typename Type>
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inline int32
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WeakPointer<Type>::UseCount() const
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WeakPointer::UseCount() const
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{
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return fUseCount;
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}
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template<typename Type>
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inline
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WeakPointer<Type>::WeakPointer(Type* object)
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:
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fUseCount(1),
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fObject(object)
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{
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}
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template<typename Type>
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inline
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WeakPointer<Type>::~WeakPointer()
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{
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}
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template<typename Type>
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inline void
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WeakPointer<Type>::_GetUnchecked()
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WeakPointer::GetUnchecked()
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{
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atomic_add(&fUseCount, 1);
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}
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@ -274,26 +240,23 @@ WeakPointer<Type>::_GetUnchecked()
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// #pragma -
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template<typename Type>
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inline
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WeakReferenceable<Type>::WeakReferenceable(Type* object)
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BWeakReferenceable::BWeakReferenceable()
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:
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fPointer(new WeakPointer<Type>(object))
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fPointer(new WeakPointer(this))
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{
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}
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template<typename Type>
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inline
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WeakReferenceable<Type>::~WeakReferenceable()
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BWeakReferenceable::~BWeakReferenceable()
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{
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fPointer->ReleaseReference();
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}
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template<typename Type>
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inline WeakPointer<Type>*
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WeakReferenceable<Type>::GetWeakPointer()
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inline WeakPointer*
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BWeakReferenceable::GetWeakPointer()
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{
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fPointer->AcquireReference();
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return fPointer;
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@ -301,8 +264,7 @@ WeakReferenceable<Type>::GetWeakPointer()
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} // namespace BPrivate
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using BPrivate::WeakReferenceable;
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using BPrivate::WeakPointer;
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using BPrivate::WeakReference;
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using BPrivate::BWeakReferenceable;
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using BPrivate::BWeakReference;
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#endif // _WEAK_REFERENCEABLE_H
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