src: remove usage of std::shared_ptr<T>::unique()

RaisinTen · RaisinTen · commit 7ea5ed182edf · 2023-03-30T15:44:14.000+05:30
`std::shared_ptr<T>::unique()` has been removed in C++20, so this change uses `std::shared_ptr<T>::use_count()` instead which is available in C++20. Fixes: #47311 Signed-off-by: Darshan Sen <raisinten@gmail.com>
diff --git a/src/node_threadsafe_cow-inl.h b/src/node_threadsafe_cow-inl.h
@@ -7,7 +7,7 @@ namespace node {
 
 template <typename T>
 T* CopyOnWrite<T>::write() {
-  if (!data_.unique()) {
+  if (data_.use_count() > 1l) {
     data_ = std::make_shared<T>(*data_);
   }
   return data_.get();

Original file line number	Diff line number	Diff line change
`@@ -7,7 +7,7 @@ namespace node {`
`7`	`7`
`8`	`8`	`template <typename T>`
`9`	`9`	`T* CopyOnWrite<T>::write() {`
`10`		`- if (!data_.unique()) {`
	`10`	`+ if (data_.use_count() > 1l) {`
`11`	`11`	`data_ = std::make_shared<T>(*data_);`
`12`	`12`	`}`
`13`	`13`	`return data_.get();`