add nativeapis

Signed-off-by: Nzengyawen <zengyawen1@huawei.com>

en/application-dev/reference/native-apis/_o_h___n_n___memory.md

+# OH_NN_Memory
+
+
+## Overview
+
+Defines the memory structure.
+
+**Since:**
+9
+
+**Related Modules:**
+
+[NeuralNeworkRuntime](_neural_nework_runtime.md)
+
+
+## Summary
+
+
+### Member Variables
+
+| Name | Description | 
+| -------- | -------- |
+| [data](#data) |Pointer to the shared memory. The shared memory is usually allocated by the underlying hardware driver.  | 
+| [length](#length) |Records the length of the shared memory, in bytes.  | 
+
+
+## Member Variable Description 
+
+
+### data
+
+  
+```
+void* const OH_NN_Memory::data
+```
+**Description**<br>
+Pointer to the shared memory. The shared memory is usually allocated by the underlying hardware driver.
+
+
+### length
+
+  
+```
+const size_t OH_NN_Memory::length
+```
+**Description**<br>
+Records the length of the shared memory, in bytes.