Event
Worker

id
init
push
done
last
worker

654500
1
0
0
1
0


id
busy
lock
event

0
1
0
654500
1
0
1

2
0
1

3
0
0

4
0
0

5
0
0

6
0
0

7
0
0

selected: 1, valid: 1, accept: 0, readwrite: 1