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J. Nick Koston
346e6b40da
Replace the FreeRTOS xQueue (xQueueCreate/xQueueSend/xQueueReceive) used for WiFi event passing with a lock-free SPSC queue. This avoids the FreeRTOS kernel spinlock overhead on every loop iteration when checking for events — the common case is an empty queue. The LockFreeQueue::pop() fast path is just two atomic loads and a comparison, vs xQueueReceive which takes a spinlock, checks the queue, and releases the spinlock even when empty. WiFi events are rare (connect/disconnect/scan) so heap allocation for event data is retained — no EventPool needed unlike the BLE path which processes hundreds of events per second. This matches the lock-free pattern already used by esp32_ble.
