dynamic_buffer_stream_close() specifications

Signature

static void dynamic_buffer_stream_close(void *backend);

Purpose

Release the backend resources owned by the dynamic_buffer_stream adapter.

Relationship to public port contract

• This is a private backend callback bound into the stream vtable.
• Its behavior is exercised through the public stream_destroy() lifecycle API.

Preconditions

• If backend != NULL, backend must designate a valid dynamic_buffer_stream_t.

Invalid arguments

• None.

Success

• Releases any resource owned by the designated dynamic_buffer_stream_t backend state.
• Releases the internal dynamic buffer storage owned by the backend, if any.
• Leaves no backend-owned dynamic-buffer storage live after the call returns.

Failure

• None.

Ownership

• backend is borrowed by the callback.
• The callback releases only the resources owned by the backend state.
• The callback does not release the public stream_t handle itself.
• Destruction of the public stream_t handle remains the responsibility of the surrounding stream lifecycle logic.

Notes

• This callback is intended to be invoked by stream_destroy(), not by borrower-facing read/write/flush operations.
• This callback performs backend cleanup only.
• It does not return a status code.
• This callback is not required to validate backend.
• The exact cleanup is limited to resources owned by the dynamic_buffer_stream backend implementation.