libatomic/config/powerpc/host-config.h

   1 /* Avoiding the synchronizations are a good thing.  */
   2 #define WANT_SPECIALCASE_RELAXED
   3 #define WANT_SPECIALCASE_ACQREL
   4
   5 /* Glibc, at least, uses lwsync (aka acq_rel) in its pthread mutex
   6    implementation.  If the user is asking for seq_cst (aka hwsync),
   7    this is insufficient.  */
   8
   9 static inline void __attribute__((always_inline, artificial))
  10 pre_seq_barrier(int model)
  11 {
  12   if (model == __ATOMIC_SEQ_CST)
  13     __atomic_thread_fence (__ATOMIC_SEQ_CST);
  14 }
  15
  16 static inline void __attribute__((always_inline, artificial))
  17 post_seq_barrier(int model)
  18 {
  19   pre_seq_barrier(model);
  20 }
  21
  22 #define pre_post_seq_barrier 1
  23
  24 #include_next <host-config.h>