# native_buffer.h


## 概述

定义获取和使用NativeBuffer的相关函数。

**自从：**

9

**相关模块：**

[OH_NativeBuffer](_o_h___native_buffer.md)


## 汇总


### 结构体

| 结构体名称 | 描述 |
| -------- | -------- |
| [OH_NativeBuffer_Config](_o_h___native_buffer___config.md) | OH_NativeBuffer的属性配置，用于申请新的OH_NativeBuffer实例或查询现有实例的相关属性。 |


### 函数

| 函数名称 | 描述 |
| -------- | -------- |
| [OH_NativeBuffer_Alloc](_o_h___native_buffer.md#oh_nativebuffer_alloc) (const [OH_NativeBuffer_Config](_o_h___native_buffer___config.md) \*config) | 通过OH_NativeBuffer_Config创建OH_NativeBuffer实例，每次调用都会产生一个新的OH_NativeBuffer实例。 |
| [OH_NativeBuffer_Reference](_o_h___native_buffer.md#oh_nativebuffer_reference) (OH_NativeBuffer \*buffer) | 将OH_NativeBuffer对象的引用计数加1。 |
| [OH_NativeBuffer_Unreference](_o_h___native_buffer.md#oh_nativebuffer_unreference) (OH_NativeBuffer \*buffer) | 将OH_NativeBuffer对象的引用计数减1，当引用计数为0的时候，该NativeBuffer对象会被析构掉。 |
| [OH_NativeBuffer_GetConfig](_o_h___native_buffer.md#oh_nativebuffer_getconfig) (OH_NativeBuffer \*buffer, [OH_NativeBuffer_Config](_o_h___native_buffer___config.md) \*config) | 用于获取OH_NativeBuffer的属性。 |
| [OH_NativeBuffer_Map](_o_h___native_buffer.md#oh_nativebuffer_map) (OH_NativeBuffer \*buffer, void \*\*virAddr) | 将OH_NativeBuffer对应的ION内存映射到进程空间。 |
| [OH_NativeBuffer_Unmap](_o_h___native_buffer.md#oh_nativebuffer_unmap) (OH_NativeBuffer \*buffer) | 将OH_NativeBuffer对应的ION内存从进程空间移除。 |
| [OH_NativeBuffer_GetSeqNum](_o_h___native_buffer.md#oh_nativebuffer_getseqnum) (OH_NativeBuffer \*buffer) | 获取OH_NativeBuffer的序列号。 |