When we should avoid use of volatile

volatile means value of variable may be change at anytime

In example, compiler know that foo is set to 0 and compiler will never look into while loop but by external even when foo become 1 then compiler will execute statement

Code:

---

int foo
void bar ()
{
    foo = 0;
    while (foo = 1)
      {
          statement
      }
}

---

When we should avoid use of volatile variable in program?

In the example, foo is set to 1 and the while loop never ends.

Quote:

---

Originally Posted by Player777

volatile means value of variable may be change at anytime


When we should avoid use of volatile variable in program?

---

You should only use volatile when it is needed.
Newbies should avoid it nearly all the time!
When dealing with hardware registers it is needed.
When dealing with ISR routines it is often needed. Interrupt Service Routines(ISR).
When dealing with dealing with multiple processes it might be needed.
Edit: When dealing with shared memory it might be needed.

Tim S.