Robot Inter-Process Communication via Shared Memory Feedback

The system implements a feedback mechanism where subscribers monitor shared memory slots for new messages and provide feedback by clearing the 'new message' indicator after reading. The publisher receives this feedback and adjusts its behavior accordingly, only writing to slots that have been cleared, thus ensuring messages are not overwritten before being read.

The patent introduces an intermediary mechanism in the form of a 'new message' indicator flag in each shared memory slot. This intermediary element mediates between the publisher and subscriber, allowing the publisher to signal message availability without directly controlling subscriber access, and enabling the subscriber to acknowledge reading without blocking the publisher.

The system performs preliminary actions by pre-allocating multiple shared memory slots and pre-setting the 'new message' indicator flags. The publisher can immediately write to any slot that has been cleared by a subscriber, without waiting for active acknowledgment. This preliminary preparation of the communication infrastructure eliminates waiting time while maintaining reliability.

The patent enables continuous useful action by allowing the publisher to write messages to multiple different slots in rapid succession as long as those slots have been cleared by subscribers. This continuous writing capability maintains high communication throughput while the subscriber continuously reads and clears slots, ensuring no messages are lost without requiring sequential acknowledgment for each message.