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/**
@file ReferenceCount.cpp
Reference Counting Garbage Collector for C++
@maintainer Morgan McGuire, http://graphics.cs.williams.edu
@cite Adapted and extended from Justin Miller's "RGC" class that appeared in BYTE magazine.
@cite See also http://www.jelovic.com/articles/cpp_without_memory_errors_slides.htm
@created 2001-10-23
@edited 2009-04-25
*/
#include "G3D/platform.h"
#include "G3D/ReferenceCount.h"
namespace G3D {
ReferenceCountedObject::ReferenceCountedObject() :
ReferenceCountedObject_refCount(0),
ReferenceCountedObject_weakPointer(0) {
debugAssertM(isValidHeapPointer(this),
"Reference counted objects must be allocated on the heap.");
}
void ReferenceCountedObject::ReferenceCountedObject_zeroWeakPointers() {
// Tell all of my weak pointers that I'm gone.
_WeakPtrLinkedList* node = ReferenceCountedObject_weakPointer;
while (node != NULL) {
// Notify the weak pointer that it is going away
node->weakPtr->objectCollected();
// Free the node and advance
_WeakPtrLinkedList* tmp = node;
node = node->next;
delete tmp;
}
}
ReferenceCountedObject::~ReferenceCountedObject() {}
ReferenceCountedObject::ReferenceCountedObject(const ReferenceCountedObject& notUsed) :
ReferenceCountedObject_refCount(0),
ReferenceCountedObject_weakPointer(0) {
(void)notUsed;
debugAssertM(G3D::isValidHeapPointer(this),
"Reference counted objects must be allocated on the heap.");
}
ReferenceCountedObject& ReferenceCountedObject::operator=(const ReferenceCountedObject& other) {
(void)other;
// Nothing changes when I am assigned; the reference count on
// both objects is the same (although my super-class probably
// changes).
return *this;
}
} // G3D
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