Roll HarfBuzz to 1.1.3

third_party/harfbuzz-ng/src/hb-atomic-private.hh

 /*
  * Copyright © 2007  Chris Wilson
  * Copyright © 2009,2010  Red Hat, Inc.
  * Copyright © 2011,2012  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
@@ skipping 101 matching lines @@
 #include <mbarrier.h>
 
 typedef unsigned int hb_atomic_int_impl_t;
 #define HB_ATOMIC_INT_IMPL_INIT(V) (V)
 #define hb_atomic_int_impl_add(AI, V)           ( ({__machine_rw_barrier ();}), atomic_add_int_nv (&(AI), (V)) - (V))
 
 #define hb_atomic_ptr_impl_get(P)               ( ({__machine_rw_barrier ();}), (void *) *(P))
 #define hb_atomic_ptr_impl_cmpexch(P,O,N)       ( ({__machine_rw_barrier ();}), atomic_cas_ptr ((void **) (P), (void *) (O), (void *) (N)) == (void *) (O) ? true : false)
 
 
+#elif !defined(HB_NO_MT) && defined(_AIX) && defined(__IBMCPP__)
+
+#include <builtins.h>
+
+
+static inline int hb_fetch_and_add(volatile int* AI, unsigned int V) {
+  __lwsync();
+  int result = __fetch_and_add(AI, V);
+  __isync();
+  return result;
+}
+static inline int hb_compare_and_swaplp(volatile long* P, long O, long N) {
+  __sync();
+  int result = __compare_and_swaplp (P, &O, N);
+  __sync();
+  return result;
+}
+
+typedef int hb_atomic_int_impl_t;
+#define HB_ATOMIC_INT_IMPL_INIT(V) (V)
+#define hb_atomic_int_impl_add(AI, V)           hb_fetch_and_add (&(AI), (V))
+
+#define hb_atomic_ptr_impl_get(P)               (__sync(), (void *) *(P))
+#define hb_atomic_ptr_impl_cmpexch(P,O,N)       hb_compare_and_swaplp ((long*)(P), (long)(O), (long)(N))
+
 #elif !defined(HB_NO_MT)
 
 #define HB_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */
 
 typedef volatile int hb_atomic_int_impl_t;
 #define HB_ATOMIC_INT_IMPL_INIT(V) (V)
 #define hb_atomic_int_impl_add(AI, V)           (((AI) += (V)) - (V))
 
 #define hb_atomic_ptr_impl_get(P)               ((void *) *(P))
 #define hb_atomic_ptr_impl_cmpexch(P,O,N)       (* (void * volatile *) (P) == (void *) (O) ? (* (void * volatile *) (P) = (void *) (N), true) : false)
@@ skipping 23 matching lines @@
   inline int inc (void) { return hb_atomic_int_impl_add (const_cast<hb_atomic_int_impl_t &> (v),  1); }
   inline int dec (void) { return hb_atomic_int_impl_add (const_cast<hb_atomic_int_impl_t &> (v), -1); }
 };
 
 
 #define hb_atomic_ptr_get(P) hb_atomic_ptr_impl_get(P)
 #define hb_atomic_ptr_cmpexch(P,O,N) hb_atomic_ptr_impl_cmpexch((P),(O),(N))
 
 
 #endif /* HB_ATOMIC_PRIVATE_HH */