scripts/atomic/fallbacks/dec_unless_positive

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