> For the complete documentation index, see [llms.txt](https://portal-integracao.intelbras.com.br/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://portal-integracao.intelbras.com.br/linha-android/iaserver/sharememorywrappermanager.md).

# ShareMemoryWrapperManager

Devido à restrição do mecanismo Android, a comunicação IPC não pode transmitir um grande número, então aqui o modo de memória compartilhada é usado para transmitir dados. O compartilhado token de memória representa um bloco de memória compartilhada. Atualmente, o serviço inteligente é passar os dados do quadro de identificação entre processos através deste esquema.

{% hint style="danger" %}
Nota: O recurso de memória compartilhada é muito limitado e é comum a todo o sistema. Deve ser reutilizado tanto quanto possível para evitar aplicações e liberações repetidas.
{% endhint %}

```java
/**
* Gets a valid shared memory object, internally checked for token validity, that is, returned only if
the token is valid, otherwise null
* If not reused, {@link ShareMemoryWrapper#release()} should be used accordingly
*
* @param size Shared memory size
* @return Shared memory object
*/
public ShareMemoryWrapper getValidShareMemoryWrapper(int size)
/**
* Reads data from shared memory
*
* @param token Shared memory token
* @return The data read
*/
public byte[] readShareBytes(int token)
/**
* Reads the specified length of data in the shared memory token
*
* @param token Shared memory token
* @param length Length of the read
* @return The data read
*/
public byte[] readShareBytes(int token, int length)
/**
* Writes data to shared memory
*
* @param token Shared memory token
* @param bytes Data to be written
* @return Result of the interface execution. true indicates success
*/
public boolean writeShareBytes(int token, byte[] bytes)
/**
* Reads the specified length of data in the shared memory token
*
* @param memoryWrapper Shared memory wrapper object
* @param length Length of the read
* @return The data read
*/
public byte[] readShareBytes(ShareMemoryWrapper memoryWrapper, int length)
/**
* Read all data in the shared memory token
*
* @param memoryWrapper Shared memory wrapper object
* @return The data read
*/
public byte[] readShareBytes(ShareMemoryWrapper memoryWrapper)
/**
* Reads the specified length of data in the shared memory token
*
* @param token Shared memory token
* @param destBytes The target buffer for the read data
* @param length Length of the read
* @return Result of the interface execution {@link JniResultCode}
*/
public int readShareBytes(int token, byte[] destBytes, int length)
/**
* Reads the specified length of data in the shared memory token
*
* @param memoryWrapper Shared memory wrapper object
* @param destBytes The target buffer for the read data
* @param length Length of the read
* @return Result of the interface execution {@link JniResultCode}
*/
public int readShareBytes(ShareMemoryWrapper memoryWrapper, byte[] destBytes, int length)
/**
* Writes data to shared memory
*
* @param memoryWrapper Shared memory wrapper object
* @param bytes Data to be written
* @return Result of the interface execution. true indicates success
*/
public boolean writeShareBytes(ShareMemoryWrapper memoryWrapper, byte[] bytes)
/**
* Request the free shared memory object from the shared memory service and remove the {@link
ShareMemoryWrapper} object from the reuse cache.
* The caller needs to set the reference count of the {@link ShareMemoryWrapper} object to 0, i.e.
{@link ShareMemoryWrapper#isIdle()} is true, otherwise it cannot be released
*
* @param memoryWrapper Shared memory wrapper object
* @return Result of the interface execution. true indicates success
*/
public boolean release(ShareMemoryWrapper memoryWrapper)
```


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