This was a question as part of the onsite  - I haven\'t been able to come up with an optimal solution for this yet.\n\nWrite an API to lock a range on the number line\n\n```\nvoid rlock(int low, int high)\nboolean runlock(int low, int high) //Must unlock exactly what has been locked\n```\n\neg:\n\nT1:rlock(1,3)\nT2: rlock(2,4) --> Wait\nT2:rlock(1,3)\nT1: runlock(1,3) --> Signal waiters\n

This was a question as part of the onsite  - I haven\'t been able to come up with an optimal solution for this yet.\n\nWrite an API to lock a range on the numbe