Drv::AsyncByteStreamBufferAdapter

1 Introduction

AsyncByteStreamBufferAdapter is a passive F´ component that mediates between the AsyncByteStreamDriver interface and the PassiveBufferDriver interface. It enables asynchronous byte stream drivers to be used as passive buffer drivers by adapting the interfaces and managing buffer ownership transitions.

The component allows an asynchronous byte stream driver implementation to be transparently used by components that expect a passive buffer driver interface, providing flexibility in topology design.

2 Requirements

Name	Description	Validation
DRV-ASYNC-BSB-ADAPTER-001	The component shall adapt the AsyncByteStreamDriver interface to the PassiveBufferDriver interface	Unit Test
DRV-ASYNC-BSB-ADAPTER-002	The component shall handle buffer ownership transfers between the two interfaces	Unit Test
DRV-ASYNC-BSB-ADAPTER-003	The component shall monitor the AsyncByteStreamDriver readiness state	Unit Test
DRV-ASYNC-BSB-ADAPTER-004	The component shall emit events on error conditions	Unit Test

3 Design

3.1 Assumptions

The design of AsyncByteStreamBufferAdapter assumes the following:

1. The async byte stream driver will properly signal ready status before accepting data.
2. Buffer ownership follows the standard Return-To-Sender pattern: buffers are owned by the receiver until returned.
3. The async byte stream driver operates correctly and returns buffers sent to it when it is done processing.

3.2 State

AsyncByteStreamBufferAdapter maintains a single state variable:

• m_driverIsReady: An atomic boolean flag indicating whether the async byte stream driver is ready to accept data. Initialized to false and set to true when a ready signal is received from the driver.