add ctl_free function
---
test...
Merge branch 'feature-vector'
Merge branch 'feature-utility'
Merge branch 'feature-test'
fix a bug
Merge branch 'feature-vector'
add...
Merge branch 'feature-vector'
fix a bug
Merge branch 'feature-vector'
test...
test
test...
test001
Merge branch 'feature-vector' into feature-test
fix vector
Merge branch 'feature-test'
test...