Data update

Task/Memory-allocation/Rust/memory-allocation.rs

@@ -0,0 +1,17 @@
+// we have to use `unsafe` here because
+// we will be dereferencing a raw pointer
+unsafe {
+    use std::alloc::{Layout, alloc, dealloc};
+    // define a layout of a block of memory
+    let int_layout = Layout::new::<i32>();
+
+    // memory is allocated here
+    let ptr = alloc(int_layout);
+
+    // let us point to some data
+    *ptr = 123;
+    assert_eq!(*ptr, 123);
+
+    // deallocate `ptr` with associated layout `int_layout`
+    dealloc(ptr, int_layout);
+}