From c81cb64416217df2de4032c818914fea0691e92c Mon Sep 17 00:00:00 2001
From: AndreaCatania <info@andreacatania.com>
Date: Sat, 14 Aug 2021 09:00:58 +0200
Subject: [PATCH] Add the possibility to initialize the classes allocated with
 the PagedAllocator

It uses the (`const T &&... p_args`) forward reference, to avoid copying the
memory in case it's an rvalue, or pass a reference in case it's an lvalue.

This is an example:
```c++
PagedAllocator<btShapeBox> box_allocator;
btShapeBox* box = box_allocator.alloc( btVector3(1.0, 1.0, 1.0) );
```
---
 core/templates/paged_allocator.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/core/templates/paged_allocator.h b/core/templates/paged_allocator.h
index 481289309fd..dfc885c6eb0 100644
--- a/core/templates/paged_allocator.h
+++ b/core/templates/paged_allocator.h
@@ -50,7 +50,8 @@ class PagedAllocator {
 	SpinLock spin_lock;
 
 public:
-	T *alloc() {
+	template <class... Args>
+	T *alloc(const Args &&...p_args) {
 		if (thread_safe) {
 			spin_lock.lock();
 		}
@@ -75,7 +76,7 @@ public:
 		if (thread_safe) {
 			spin_lock.unlock();
 		}
-		memnew_placement(alloc, T);
+		memnew_placement(alloc, T(p_args...));
 		return alloc;
 	}