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[atomic] Remove IBM/AIX implementation 

The C++11 implementation shall be enough for everyone.
This commit is contained in:
Behdad Esfahbod 2021-02-22 17:23:53 -07:00
parent 52f9126960
commit b368a0736b
1 changed files with 1 additions and 27 deletions
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28
src/hb-atomic.hh
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@ -73,6 +73,7 @@ _hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N)
}
#define hb_atomic_ptr_impl_cmpexch(P,O,N) _hb_atomic_ptr_impl_cmplexch ((const void **) (P), (O), (N))
#elif !defined(HB_NO_MT)
/* C++11 atomics. */
@ -101,33 +102,6 @@ _hb_atomic_ptr_impl_cmplexch (const void **P, const void *O_, const void *N)
#define hb_atomic_ptr_impl_cmpexch(P,O,N) _hb_atomic_ptr_impl_cmplexch ((const void **) (P), (O), (N))
#elif !defined(HB_NO_MT) && defined(_AIX) && (defined(__IBMCPP__) || defined(__ibmxl__))
#include <builtins.h>
#define _hb_memory_barrier() __lwsync ()
static inline int _hb_fetch_and_add (int *AI, int V)
{
_hb_memory_barrier ();
int result = __fetch_and_add (AI, V);
_hb_memory_barrier ();
return result;
}
static inline bool _hb_compare_and_swaplp (long *P, long O, long N)
{
_hb_memory_barrier ();
bool result = __compare_and_swaplp (P, &O, N);
_hb_memory_barrier ();
return result;
}
#define hb_atomic_int_impl_add(AI, V) _hb_fetch_and_add ((AI), (V))
#define hb_atomic_ptr_impl_cmpexch(P,O,N) _hb_compare_and_swaplp ((long *) (P), (long) (O), (long) (N))
static_assert ((sizeof (long) == sizeof (void *)), "");
#elif defined(HB_NO_MT)
#define hb_atomic_int_impl_add(AI, V) ((*(AI) += (V)) - (V))