Add stack clear function, cstack_clear and cstack_clear_all. Add stack release and clear function, cstack_release_clear.
Add stack clear function, cstack_clear and cstack_clear_all.
Add stack release and clear function, cstack_release_clear.

mitchan0321/perfume,mitchan0321/perfume,mitchan0321/perfume,mitchan0321/perfume,mitchan0321/perfume