1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/harfbuzz/src/hb-atomic-private.hh Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,132 @@
1.4 +/*
1.5 + * Copyright © 2007 Chris Wilson
1.6 + * Copyright © 2009,2010 Red Hat, Inc.
1.7 + * Copyright © 2011,2012 Google, Inc.
1.8 + *
1.9 + * This is part of HarfBuzz, a text shaping library.
1.10 + *
1.11 + * Permission is hereby granted, without written agreement and without
1.12 + * license or royalty fees, to use, copy, modify, and distribute this
1.13 + * software and its documentation for any purpose, provided that the
1.14 + * above copyright notice and the following two paragraphs appear in
1.15 + * all copies of this software.
1.16 + *
1.17 + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
1.18 + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
1.19 + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
1.20 + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
1.21 + * DAMAGE.
1.22 + *
1.23 + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
1.24 + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
1.25 + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
1.26 + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
1.27 + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
1.28 + *
1.29 + * Contributor(s):
1.30 + * Chris Wilson <chris@chris-wilson.co.uk>
1.31 + * Red Hat Author(s): Behdad Esfahbod
1.32 + * Google Author(s): Behdad Esfahbod
1.33 + */
1.34 +
1.35 +#ifndef HB_ATOMIC_PRIVATE_HH
1.36 +#define HB_ATOMIC_PRIVATE_HH
1.37 +
1.38 +#include "hb-private.hh"
1.39 +
1.40 +
1.41 +/* atomic_int */
1.42 +
1.43 +/* We need external help for these */
1.44 +
1.45 +#if 0
1.46 +
1.47 +
1.48 +#elif !defined(HB_NO_MT) && (defined(_WIN32) || defined(__CYGWIN__))
1.49 +
1.50 +#define WIN32_LEAN_AND_MEAN
1.51 +#include <windows.h>
1.52 +
1.53 +#if defined(__MINGW32__) && !defined(MemoryBarrier)
1.54 +static inline void _HBMemoryBarrier (void) {
1.55 + long dummy = 0;
1.56 + InterlockedExchange (&dummy, 1);
1.57 +}
1.58 +# define MemoryBarrier _HBMemoryBarrier
1.59 +#endif
1.60 +
1.61 +typedef LONG hb_atomic_int_t;
1.62 +#define hb_atomic_int_add(AI, V) InterlockedExchangeAdd (&(AI), (V))
1.63 +
1.64 +#define hb_atomic_ptr_get(P) (MemoryBarrier (), (void *) *(P))
1.65 +#define hb_atomic_ptr_cmpexch(P,O,N) (InterlockedCompareExchangePointer ((void **) (P), (void *) (N), (void *) (O)) == (void *) (O))
1.66 +
1.67 +
1.68 +#elif !defined(HB_NO_MT) && defined(__APPLE__)
1.69 +
1.70 +#include <libkern/OSAtomic.h>
1.71 +#ifdef __MAC_OS_X_MIN_REQUIRED
1.72 +#include <AvailabilityMacros.h>
1.73 +#elif defined(__IPHONE_OS_MIN_REQUIRED)
1.74 +#include <Availability.h>
1.75 +#endif
1.76 +
1.77 +typedef int32_t hb_atomic_int_t;
1.78 +#define hb_atomic_int_add(AI, V) (OSAtomicAdd32Barrier ((V), &(AI)) - (V))
1.79 +
1.80 +#define hb_atomic_ptr_get(P) (OSMemoryBarrier (), (void *) *(P))
1.81 +#if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_VERSION_MIN_REQUIRED >= 20100)
1.82 +#define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P))
1.83 +#else
1.84 +#if __ppc64__ || __x86_64__ || __arm64__
1.85 +#define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwap64Barrier ((int64_t) (O), (int64_t) (N), (int64_t*) (P))
1.86 +#else
1.87 +#define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwap32Barrier ((int32_t) (O), (int32_t) (N), (int32_t*) (P))
1.88 +#endif
1.89 +#endif
1.90 +
1.91 +
1.92 +#elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES)
1.93 +
1.94 +typedef int hb_atomic_int_t;
1.95 +#define hb_atomic_int_add(AI, V) __sync_fetch_and_add (&(AI), (V))
1.96 +
1.97 +#define hb_atomic_ptr_get(P) (void *) (__sync_synchronize (), *(P))
1.98 +#define hb_atomic_ptr_cmpexch(P,O,N) __sync_bool_compare_and_swap ((P), (O), (N))
1.99 +
1.100 +
1.101 +#elif !defined(HB_NO_MT) && defined(HAVE_SOLARIS_ATOMIC_OPS)
1.102 +
1.103 +#include <atomic.h>
1.104 +#include <mbarrier.h>
1.105 +
1.106 +typedef unsigned int hb_atomic_int_t;
1.107 +#define hb_atomic_int_add(AI, V) ( ({__machine_rw_barrier ();}), atomic_add_int_nv (&(AI), (V)) - (V))
1.108 +
1.109 +#define hb_atomic_ptr_get(P) ( ({__machine_rw_barrier ();}), (void *) *(P))
1.110 +#define hb_atomic_ptr_cmpexch(P,O,N) ( ({__machine_rw_barrier ();}), atomic_cas_ptr ((void **) (P), (void *) (O), (void *) (N)) == (void *) (O) ? true : false)
1.111 +
1.112 +
1.113 +#elif !defined(HB_NO_MT)
1.114 +
1.115 +#define HB_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */
1.116 +typedef volatile int hb_atomic_int_t;
1.117 +#define hb_atomic_int_add(AI, V) (((AI) += (V)) - (V))
1.118 +
1.119 +#define hb_atomic_ptr_get(P) ((void *) *(P))
1.120 +#define hb_atomic_ptr_cmpexch(P,O,N) (* (void * volatile *) (P) == (void *) (O) ? (* (void * volatile *) (P) = (void *) (N), true) : false)
1.121 +
1.122 +
1.123 +#else /* HB_NO_MT */
1.124 +
1.125 +typedef int hb_atomic_int_t;
1.126 +#define hb_atomic_int_add(AI, V) (((AI) += (V)) - (V))
1.127 +
1.128 +#define hb_atomic_ptr_get(P) ((void *) *(P))
1.129 +#define hb_atomic_ptr_cmpexch(P,O,N) (* (void **) (P) == (void *) (O) ? (* (void **) (P) = (void *) (N), true) : false)
1.130 +
1.131 +#endif
1.132 +
1.133 +/* TODO Add tracing. */
1.134 +
1.135 +#endif /* HB_ATOMIC_PRIVATE_HH */
