mailbox: Clarify multi-thread is not supported in blocking mode

Unlike in non-blocking mode, multi-thread has not been supported in
blocking mode. This commit is to prevent clients from having wrong
assumption by explicitly specifying this fact to the API doc.

Signed-off-by: Joonwon Kang <joonwonkang@google.com>
Signed-off-by: Jassi Brar <jassisinghbrar@gmail.com>
This commit is contained in:
Joonwon Kang 2026-04-21 10:46:51 +00:00 • committed by Jassi Brar
commit c96c8a7404