Hello friends,

I am using atomic operations provided by the QNX to change and access (or check) variable value between two threads... 
Here is pseudo implementation of my case.

volatile unsigned digit;

thread_1()
{
       while(1) {
           if(digit > 10)
               break;
           else
              ....
       }
   ...
}

thread_2()
{
       while(1) {
           delay(10);

           atomic_add(&digit, 1);
       }
   ...
}


Now, As far as I know there isn't any function (like atomic_read() in Linux) to read and then test variable atomically 
which I can use for checking "digit" value in "If statement" in thread_1.

So, please anyone tell me, is it enough what I have done in above case or do I have to use other synchronization 
mechanism like mutex or spinlock?


Thank you very much
Apurva