fix socket busy loop; del locked readall; refactor.

lichao

2021-04-26 1b167ec5ad101ac44451381e26cc73ab5d67d2a1

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*.un~
build/
debug/
release/
Makefile
utest/utest
*.bak
gmon.out
*/bhshmq_center
*/help
*/bhshmqbox
*/bhshmq_status
.idea