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gfx/harfbuzz/src/hb-atomic-private.hh@925c144e1f1f (annotated)

gfx/harfbuzz/src/hb-atomic-private.hh

Fri, 16 Jan 2015 18:13:44 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Fri, 16 Jan 2015 18:13:44 +0100
branch
TOR_BUG_9701
changeset 14
925c144e1f1f
permissions
-rw-r--r--

Integrate suggestion from review to improve consistency with existing code.

michael@0 1 /*
michael@0 2 * Copyright © 2007 Chris Wilson
michael@0 3 * Copyright © 2009,2010 Red Hat, Inc.
michael@0 4 * Copyright © 2011,2012 Google, Inc.
michael@0 5 *
michael@0 6 * This is part of HarfBuzz, a text shaping library.
michael@0 7 *
michael@0 8 * Permission is hereby granted, without written agreement and without
michael@0 9 * license or royalty fees, to use, copy, modify, and distribute this
michael@0 10 * software and its documentation for any purpose, provided that the
michael@0 11 * above copyright notice and the following two paragraphs appear in
michael@0 12 * all copies of this software.
michael@0 13 *
michael@0 14 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
michael@0 15 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
michael@0 16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
michael@0 17 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
michael@0 18 * DAMAGE.
michael@0 19 *
michael@0 20 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
michael@0 21 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
michael@0 22 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
michael@0 23 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
michael@0 24 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
michael@0 25 *
michael@0 26 * Contributor(s):
michael@0 27 * Chris Wilson <chris@chris-wilson.co.uk>
michael@0 28 * Red Hat Author(s): Behdad Esfahbod
michael@0 29 * Google Author(s): Behdad Esfahbod
michael@0 30 */
michael@0 31
michael@0 32 #ifndef HB_ATOMIC_PRIVATE_HH
michael@0 33 #define HB_ATOMIC_PRIVATE_HH
michael@0 34
michael@0 35 #include "hb-private.hh"
michael@0 36
michael@0 37
michael@0 38 /* atomic_int */
michael@0 39
michael@0 40 /* We need external help for these */
michael@0 41
michael@0 42 #if 0
michael@0 43
michael@0 44
michael@0 45 #elif !defined(HB_NO_MT) && (defined(_WIN32) || defined(__CYGWIN__))
michael@0 46
michael@0 47 #define WIN32_LEAN_AND_MEAN
michael@0 48 #include <windows.h>
michael@0 49
michael@0 50 #if defined(__MINGW32__) && !defined(MemoryBarrier)
michael@0 51 static inline void _HBMemoryBarrier (void) {
michael@0 52 long dummy = 0;
michael@0 53 InterlockedExchange (&dummy, 1);
michael@0 54 }
michael@0 55 # define MemoryBarrier _HBMemoryBarrier
michael@0 56 #endif
michael@0 57
michael@0 58 typedef LONG hb_atomic_int_t;
michael@0 59 #define hb_atomic_int_add(AI, V) InterlockedExchangeAdd (&(AI), (V))
michael@0 60
michael@0 61 #define hb_atomic_ptr_get(P) (MemoryBarrier (), (void *) *(P))
michael@0 62 #define hb_atomic_ptr_cmpexch(P,O,N) (InterlockedCompareExchangePointer ((void **) (P), (void *) (N), (void *) (O)) == (void *) (O))
michael@0 63
michael@0 64
michael@0 65 #elif !defined(HB_NO_MT) && defined(__APPLE__)
michael@0 66
michael@0 67 #include <libkern/OSAtomic.h>
michael@0 68 #ifdef __MAC_OS_X_MIN_REQUIRED
michael@0 69 #include <AvailabilityMacros.h>
michael@0 70 #elif defined(__IPHONE_OS_MIN_REQUIRED)
michael@0 71 #include <Availability.h>
michael@0 72 #endif
michael@0 73
michael@0 74 typedef int32_t hb_atomic_int_t;
michael@0 75 #define hb_atomic_int_add(AI, V) (OSAtomicAdd32Barrier ((V), &(AI)) - (V))
michael@0 76
michael@0 77 #define hb_atomic_ptr_get(P) (OSMemoryBarrier (), (void *) *(P))
michael@0 78 #if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_VERSION_MIN_REQUIRED >= 20100)
michael@0 79 #define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P))
michael@0 80 #else
michael@0 81 #if __ppc64__ || __x86_64__ || __arm64__
michael@0 82 #define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwap64Barrier ((int64_t) (O), (int64_t) (N), (int64_t*) (P))
michael@0 83 #else
michael@0 84 #define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwap32Barrier ((int32_t) (O), (int32_t) (N), (int32_t*) (P))
michael@0 85 #endif
michael@0 86 #endif
michael@0 87
michael@0 88
michael@0 89 #elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES)
michael@0 90
michael@0 91 typedef int hb_atomic_int_t;
michael@0 92 #define hb_atomic_int_add(AI, V) __sync_fetch_and_add (&(AI), (V))
michael@0 93
michael@0 94 #define hb_atomic_ptr_get(P) (void *) (__sync_synchronize (), *(P))
michael@0 95 #define hb_atomic_ptr_cmpexch(P,O,N) __sync_bool_compare_and_swap ((P), (O), (N))
michael@0 96
michael@0 97
michael@0 98 #elif !defined(HB_NO_MT) && defined(HAVE_SOLARIS_ATOMIC_OPS)
michael@0 99
michael@0 100 #include <atomic.h>
michael@0 101 #include <mbarrier.h>
michael@0 102
michael@0 103 typedef unsigned int hb_atomic_int_t;
michael@0 104 #define hb_atomic_int_add(AI, V) ( ({__machine_rw_barrier ();}), atomic_add_int_nv (&(AI), (V)) - (V))
michael@0 105
michael@0 106 #define hb_atomic_ptr_get(P) ( ({__machine_rw_barrier ();}), (void *) *(P))
michael@0 107 #define hb_atomic_ptr_cmpexch(P,O,N) ( ({__machine_rw_barrier ();}), atomic_cas_ptr ((void **) (P), (void *) (O), (void *) (N)) == (void *) (O) ? true : false)
michael@0 108
michael@0 109
michael@0 110 #elif !defined(HB_NO_MT)
michael@0 111
michael@0 112 #define HB_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */
michael@0 113 typedef volatile int hb_atomic_int_t;
michael@0 114 #define hb_atomic_int_add(AI, V) (((AI) += (V)) - (V))
michael@0 115
michael@0 116 #define hb_atomic_ptr_get(P) ((void *) *(P))
michael@0 117 #define hb_atomic_ptr_cmpexch(P,O,N) (* (void * volatile *) (P) == (void *) (O) ? (* (void * volatile *) (P) = (void *) (N), true) : false)
michael@0 118
michael@0 119
michael@0 120 #else /* HB_NO_MT */
michael@0 121
michael@0 122 typedef int hb_atomic_int_t;
michael@0 123 #define hb_atomic_int_add(AI, V) (((AI) += (V)) - (V))
michael@0 124
michael@0 125 #define hb_atomic_ptr_get(P) ((void *) *(P))
michael@0 126 #define hb_atomic_ptr_cmpexch(P,O,N) (* (void **) (P) == (void *) (O) ? (* (void **) (P) = (void *) (N), true) : false)
michael@0 127
michael@0 128 #endif
michael@0 129
michael@0 130 /* TODO Add tracing. */
michael@0 131
michael@0 132 #endif /* HB_ATOMIC_PRIVATE_HH */

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