OS: When to decide having re-entrant function in code is necessary ?

Question

I know the basic definition of re-entrant code and but don't known when it is really required ?

Answer 1

Hi Ganesh,

It depends on you or programmer. Re entrant code normally programmer wont prefer, Re entrant may be because of recursive function call or external interrupt like hardware signal. If it is a external interrupt then it is fine bit it it is a re cursive it will cause timing issue and affecting global variables etc.