/*
 * SPtr.cpp
 *
 *  Created on: Oct 4, 2012
 *      Author: mike
 */

#include "SPtr.hpp"

//------------------------------------------------------------------------------
// Make *this point to the same T object as p.
void SPtr::attach(SPtr& p) {
	count = p.count;
	target = p.target; // copy pointer
	(*count)++;
}

//------------------------------------------------------------------------------
// Make *this no longer point to anything, and delete the count and target
// if this was the last pointer to that object.
void SPtr::detach() {
	if (*count == 1) {
		cout << "releasing SPtr-controlled storage" << endl;
		delete count;
		delete target;
	} else {
		(*count)--;
	}
	// Okay to leave dangling pointer since detach() is private and is
	// only called from the destructor, copy constructor, and assignment
	// operator (which overwrite count and target immediately afterwards).
	// count = nullptr;	// don't leave dangling pointers
	// target = nullptr;
}