62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
/**
|
|
@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
|