Merge branch 'master' of https://github.com/wangzhengquan/shmqueue

wangzhengquan

2021-01-13 76bd3ff05443dc703c0fa1f8907301199b2c09c0

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ipcrm -a
rm *.txt
./test_lostdata
sort -n c.txt  > c1.txt
sort -n p.txt  > p1.txt
diff -u p1.txt c1.txt