Fix: deadlocking when calling `close_ns` from inside a `disconnect_handler`

[Totodore]

Motivation

• Gracefully close the namespace rather than just removing it. Meaning that the corresponding namespace adapter will be closed as well as all the sockets in the namespace. Their disconnect_handler will be called with a ServerNSDisconnect reason.
• Fix deadlock when deleting the namespace from inside a disconnect_handler.

Fixes :

• 311

[github-actions[bot]]

Bencher

Report	Mon, May 6, 2024 at 18:27:09 UTC
Project	Socketioxide
Branch	fix-deadlock-close-ns
Testbed	ubuntu-latest

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Benchmark	Latency	Latency Results nanoseconds (ns)
engineio_packet/decode/Decode packet binary b64	➖ (view plot)	84.72
engineio_packet/decode/Decode packet message	➖ (view plot)	45.88
engineio_packet/decode/Decode packet noop	➖ (view plot)	35.01
engineio_packet/decode/Decode packet ping/pong	➖ (view plot)	31.34
engineio_packet/decode/Decode packet ping/pong upgrade	➖ (view plot)	34.58
engineio_packet/encode/Encode packet binary b64	➖ (view plot)	56.02
engineio_packet/encode/Encode packet message	➖ (view plot)	31.21
engineio_packet/encode/Encode packet noop	➖ (view plot)	30.93
engineio_packet/encode/Encode packet open	➖ (view plot)	297.48
engineio_packet/encode/Encode packet ping/pong	➖ (view plot)	30.50
engineio_packet/encode/Encode packet ping/pong upgrade	➖ (view plot)	30.61
extensions/concurrent_get	➖ (view plot)	26.36
extensions/concurrent_get_inserts	➖ (view plot)	30.67
extensions/concurrent_inserts	➖ (view plot)	22.98
socketio_packet/decode/Decode packet ack on /	➖ (view plot)	272.25
socketio_packet/decode/Decode packet ack on /custom_nsp	➖ (view plot)	293.56
socketio_packet/decode/Decode packet binary ack (b64) on /	➖ (view plot)	508.54
socketio_packet/decode/Decode packet binary ack (b64) on /custom_nsp	➖ (view plot)	539.50
socketio_packet/decode/Decode packet binary event (b64) on /	➖ (view plot)	599.58
socketio_packet/decode/Decode packet binary event (b64) on /custom_nsp	➖ (view plot)	604.70
socketio_packet/decode/Decode packet connect on /	➖ (view plot)	62.15
socketio_packet/decode/Decode packet connect on /custom_nsp	➖ (view plot)	76.19
socketio_packet/decode/Decode packet event on /	➖ (view plot)	363.14
socketio_packet/decode/Decode packet event on /custom_nsp	➖ (view plot)	385.59
socketio_packet/decode/Decode packet event with ack on /	➖ (view plot)	364.10
socketio_packet/decode/Decode packet event with ack on /custom_nsp	➖ (view plot)	385.58
socketio_packet/encode/Encode packet ack on /	➖ (view plot)	123.61
socketio_packet/encode/Encode packet ack on /custom_nsp	➖ (view plot)	126.71
socketio_packet/encode/Encode packet binary ack (b64) on /	➖ (view plot)	308.66
socketio_packet/encode/Encode packet binary ack (b64) on /custom_nsp	➖ (view plot)	313.00
socketio_packet/encode/Encode packet binary event (b64) on /	➖ (view plot)	398.79
socketio_packet/encode/Encode packet binary event (b64) on /custom_nsp	➖ (view plot)	415.46
socketio_packet/encode/Encode packet connect on /	➖ (view plot)	53.17
socketio_packet/encode/Encode packet connect on /custom_nsp	➖ (view plot)	55.65
socketio_packet/encode/Encode packet event on /	➖ (view plot)	127.49
socketio_packet/encode/Encode packet event on /custom_nsp	➖ (view plot)	131.20
socketio_packet/encode/Encode packet event with ack on /	➖ (view plot)	127.07
socketio_packet/encode/Encode packet event with ack on /custom_nsp	➖ (view plot)	130.88

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