kc3-lang/harfbuzz/src/hb-atomic-private.hh

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• Hash : 05870ed6
  Author :
  Date : 2014-04-02T11:35:27
  

  Use __aarch64__ for 64-bit ARM detection, not __arm64__
  
  Many GCC versions don't define __arm64__
  

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• 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
   * above copyright notice and the following two paragraphs appear in
   * all copies of this software.
   *
   * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
   * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
   * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
   * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
   * DAMAGE.
   *
   * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
   * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
   * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
   * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
   * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
   *
   * Contributor(s):
   *	Chris Wilson <chris@chris-wilson.co.uk>
   * Red Hat Author(s): Behdad Esfahbod
   * Google Author(s): Behdad Esfahbod
   */
  
  #ifndef HB_ATOMIC_PRIVATE_HH
  #define HB_ATOMIC_PRIVATE_HH
  
  #include "hb-private.hh"
  
  
  /* atomic_int */
  
  /* We need external help for these */
  
  #if 0
  
  
  #elif !defined(HB_NO_MT) && (defined(_WIN32) || defined(__CYGWIN__))
  
  #define WIN32_LEAN_AND_MEAN
  #include <windows.h>
  
  /* MinGW has a convoluted history of supporting MemoryBarrier
   * properly.  As such, define a function to wrap the whole
   * thing. */
  static inline void _HBMemoryBarrier (void) {
  #if !defined(MemoryBarrier)
    long dummy = 0;
    InterlockedExchange (&dummy, 1);
  #else
    MemoryBarrier ();
  #endif
  }
  
  typedef LONG hb_atomic_int_t;
  #define hb_atomic_int_add(AI, V)	InterlockedExchangeAdd (&(AI), (V))
  
  #define hb_atomic_ptr_get(P)		(_HBMemoryBarrier (), (void *) *(P))
  #define hb_atomic_ptr_cmpexch(P,O,N)	(InterlockedCompareExchangePointer ((void **) (P), (void *) (N), (void *) (O)) == (void *) (O))
  
  
  #elif !defined(HB_NO_MT) && defined(__APPLE__)
  
  #include <libkern/OSAtomic.h>
  #ifdef __MAC_OS_X_MIN_REQUIRED
  #include <AvailabilityMacros.h>
  #elif defined(__IPHONE_OS_MIN_REQUIRED)
  #include <Availability.h>
  #endif
  
  typedef int32_t hb_atomic_int_t;
  #define hb_atomic_int_add(AI, V)	(OSAtomicAdd32Barrier ((V), &(AI)) - (V))
  
  #define hb_atomic_ptr_get(P)		(OSMemoryBarrier (), (void *) *(P))
  #if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_VERSION_MIN_REQUIRED >= 20100)
  #define hb_atomic_ptr_cmpexch(P,O,N)	OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P))
  #else
  #if __ppc64__ || __x86_64__ || __aarch64__
  #define hb_atomic_ptr_cmpexch(P,O,N)    OSAtomicCompareAndSwap64Barrier ((int64_t) (O), (int64_t) (N), (int64_t*) (P))
  #else
  #define hb_atomic_ptr_cmpexch(P,O,N)    OSAtomicCompareAndSwap32Barrier ((int32_t) (O), (int32_t) (N), (int32_t*) (P))
  #endif
  #endif
  
  
  #elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES)
  
  typedef int hb_atomic_int_t;
  #define hb_atomic_int_add(AI, V)	__sync_fetch_and_add (&(AI), (V))
  
  #define hb_atomic_ptr_get(P)		(void *) (__sync_synchronize (), *(P))
  #define hb_atomic_ptr_cmpexch(P,O,N)	__sync_bool_compare_and_swap ((P), (O), (N))
  
  
  #elif !defined(HB_NO_MT) && defined(HAVE_SOLARIS_ATOMIC_OPS)
  
  #include <atomic.h>
  #include <mbarrier.h>
  
  typedef unsigned int hb_atomic_int_t;
  #define hb_atomic_int_add(AI, V)	( ({__machine_rw_barrier ();}), atomic_add_int_nv (&(AI), (V)) - (V))
  
  #define hb_atomic_ptr_get(P)		( ({__machine_rw_barrier ();}), (void *) *(P))
  #define hb_atomic_ptr_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)
  
  #define HB_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */
  typedef volatile int hb_atomic_int_t;
  #define hb_atomic_int_add(AI, V)	(((AI) += (V)) - (V))
  
  #define hb_atomic_ptr_get(P)		((void *) *(P))
  #define hb_atomic_ptr_cmpexch(P,O,N)	(* (void * volatile *) (P) == (void *) (O) ? (* (void * volatile *) (P) = (void *) (N), true) : false)
  
  
  #else /* HB_NO_MT */
  
  typedef int hb_atomic_int_t;
  #define hb_atomic_int_add(AI, V)	(((AI) += (V)) - (V))
  
  #define hb_atomic_ptr_get(P)		((void *) *(P))
  #define hb_atomic_ptr_cmpexch(P,O,N)	(* (void **) (P) == (void *) (O) ? (* (void **) (P) = (void *) (N), true) : false)
  
  #endif
  
  /* TODO Add tracing. */
  
  #endif /* HB_ATOMIC_PRIVATE_HH */
  

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