From 720e718186e6ec0e76bc08a9cedf9f08afc5e904 Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Thu, 28 Oct 2021 19:27:57 +0800
Subject: *misc

---
 Runtime/Utilities/DynamicArray.h | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'Runtime/Utilities/DynamicArray.h')

diff --git a/Runtime/Utilities/DynamicArray.h b/Runtime/Utilities/DynamicArray.h
index e69de29..16680bc 100644
--- a/Runtime/Utilities/DynamicArray.h
+++ b/Runtime/Utilities/DynamicArray.h
@@ -0,0 +1,34 @@
+#pragma once 
+
+enum { kDynamicArrayThreshold = 64 };
+
+// 阈值之内在栈上保存，超过阈值在堆上保存，并自动释放
+template<typename T>
+class DynamicArray
+{
+public:
+    DynamicArray(int capacity)
+    {
+        if (capacity * sizeof(T) > kDynamicArrayThreshold)
+        {
+            m_Data = malloc(capacity * sizeof(T));
+        }
+        else
+        {
+            m_Data = alloca(capacity * sizeof(T));
+        }
+    }
+    ~DynamicArray()
+    {
+        delete[] m_Data;
+    }
+
+private: 
+    void* operator new(std::size_t);
+
+    T* m_Data;
+
+};
+
+//https://www.jianshu.com/p/7737dab9c32b
+//https://blog.csdn.net/WUDAIJUN/article/details/9273339
\ No newline at end of file
-- 
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