zookeeper-c-client

sent_requests list

zookeeper server

to_send list

recv

async

io thread

...

send

zoo_aget

zookeeper_process

buf 2

POLLOUT

work thread

do_io

sync / async client

POLLIN

to_process list

callback thread

sync - watch_eventsasync - watch events + client response

ack 1

input_buffer 1

completion 2

do_completion

completion 1

flush_send_queue

input_buffer N

buf N

req 2

sync

req N

zoo_adelete

completions_to_process list

recv_buffer

req 1

wenfh2020.com

buf 1

process_completions

ack 2

 completion 1

do_add_completion

completion N

input_buffer 2

zookeeper-c-client

completion 2

poll