scripts/atomic/fallbacks/dec_if_positive

   1 cat <<EOF
   2 static inline ${ret}
   3 ${atomic}_dec_if_positive(${atomic}_t *v)
   4 {
   5         ${int} dec, c = ${atomic}_read(v);
   6
   7         do {
   8                 dec = c - 1;
   9                 if (unlikely(dec < 0))
  10                         break;
  11         } while (!${atomic}_try_cmpxchg(v, &c, dec));
  12
  13         return dec;
  14 }
  15 EOF