moz0809ex.txt

来自「mozilla developer book examples.」· 文本 代码 · 共 19 行

nsILocalFile *refp(nsnull);
nsresult rv = nsComponentManager::CreateInstance("@mozilla.org/file/local;1",
   nsnull,
   NS_GET_IID(nsILocalFile),
   (void **)&refp);
nsILocalFile *anotherPtr = refp;
NS_IF_ADDREF(anotherPtr); // increment refcount
nsILocalFile *oneMorePtr = refp;
NS_IF_ADDREF(oneMorePtr); // increment refcount
if (!someCondition) {
  NS_RELEASE(anotherPtr); // decrement refcount
  return NS_OK;
}
. . .
NS_RELEASE(anotherPtr); // decrement refcount
NS_RELEASE(oneMorePtr); // decrement refcount
return NS_OK;
}