目录

NativeWindowBuffer API Not Paired

使用OH_NativeWindow_CreateNativeBufferFromNativeBuffer()或OH_NativeWindow_CreateNativeBufferFromSurfaceBuffer()创建的原生窗口缓冲区，使用完毕后，需及时调用OH_NativeWindow_DestroyNativeWindowBuffer()进行释放，避免缓冲区资源无法回收，造成内存泄漏。

规则配置

// rules.json

{
  "rules": {
     "cpp": {
       "ResourceLeak": [
         {
           "ruleId": "NativeWindowBuffer API Not Paired",
           "severity": "error",
           "skip": false
         }
       ]
     }
   }
}

正例

// 正例代码

#include "native_window/external_window.h"
void ProcessBufferFromSurfaceWithDestroy(void *surfaceBuffer) 
{
    OHNativeWindowBuffer *buffer = OH_NativeWindow_CreateNativeWindowBufferFromSurfaceBuffer(surfaceBuffer);
    
    if (buffer == nullptr) {
        return;
    }
    
    // 使用 buffer 进行处理...
    
    // 正确销毁缓冲区
    OH_NativeWindow_DestroyNativeWindowBuffer(buffer);
}
void ProcessBufferFromNativeWithDestroy2(OH_NativeBuffer* nativeBuffer) 
{
    OHNativeWindowBuffer *buffer = OH_NativeWindow_CreateNativeWindowBufferFromNativeBuffer(nativeBuffer);
    
    if (buffer == nullptr) {
        return;
    }
    
    // 使用 buffer 进行处理...
    
    // 正确销毁缓冲区
    OH_NativeWindow_DestroyNativeWindowBuffer(buffer);
}

反例

// 反例代码

#include "native_window/external_window.h"
void ProcessBufferWithoutDestroy(void *surfaceBuffer) 
{
    // 从 Surface Buffer 创建
    OHNativeWindowBuffer *buffer = OH_NativeWindow_CreateNativeWindowBufferFromSurfaceBuffer(surfaceBuffer);
    
    if (buffer == nullptr) {
        return;
    }
    
    // 使用 buffer...
    
    // 未释放 - 内存泄漏！
}

Code Scanner代码检查规则的配置指导请参考1.6.3 代码检查工具（codescanner）