137 lines
4.5 KiB
C++
137 lines
4.5 KiB
C++
/*
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* Copyright © 2007 Chris Wilson
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* Copyright © 2009,2010 Red Hat, Inc.
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* Copyright © 2011,2012 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Contributor(s):
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* Chris Wilson <chris@chris-wilson.co.uk>
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* Red Hat Author(s): Behdad Esfahbod
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* Google Author(s): Behdad Esfahbod
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*/
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#ifndef HB_ATOMIC_PRIVATE_HH
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#define HB_ATOMIC_PRIVATE_HH
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#include "hb-private.hh"
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/* atomic_int */
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/* We need external help for these */
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#if 0
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#elif !defined(HB_NO_MT) && (defined(_WIN32) || defined(__CYGWIN__))
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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/* MinGW has a convoluted history of supporting MemoryBarrier
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* properly. As such, define a function to wrap the whole
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* thing. */
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static inline void _HBMemoryBarrier (void) {
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#if !defined(MemoryBarrier)
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long dummy = 0;
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InterlockedExchange (&dummy, 1);
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#else
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MemoryBarrier ();
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#endif
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}
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typedef LONG hb_atomic_int_t;
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#define hb_atomic_int_add(AI, V) InterlockedExchangeAdd (&(AI), (V))
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#define hb_atomic_ptr_get(P) (_HBMemoryBarrier (), (void *) *(P))
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#define hb_atomic_ptr_cmpexch(P,O,N) (InterlockedCompareExchangePointer ((void **) (P), (void *) (N), (void *) (O)) == (void *) (O))
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#elif !defined(HB_NO_MT) && defined(__APPLE__)
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#include <libkern/OSAtomic.h>
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#ifdef __MAC_OS_X_MIN_REQUIRED
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#include <AvailabilityMacros.h>
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#elif defined(__IPHONE_OS_MIN_REQUIRED)
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#include <Availability.h>
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#endif
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typedef int32_t hb_atomic_int_t;
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#define hb_atomic_int_add(AI, V) (OSAtomicAdd32Barrier ((V), &(AI)) - (V))
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#define hb_atomic_ptr_get(P) (OSMemoryBarrier (), (void *) *(P))
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#if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_VERSION_MIN_REQUIRED >= 20100)
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#define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P))
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#else
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#if __ppc64__ || __x86_64__ || __aarch64__
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#define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwap64Barrier ((int64_t) (O), (int64_t) (N), (int64_t*) (P))
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#else
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#define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwap32Barrier ((int32_t) (O), (int32_t) (N), (int32_t*) (P))
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#endif
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#endif
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#elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES)
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typedef int hb_atomic_int_t;
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#define hb_atomic_int_add(AI, V) __sync_fetch_and_add (&(AI), (V))
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#define hb_atomic_ptr_get(P) (void *) (__sync_synchronize (), *(P))
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#define hb_atomic_ptr_cmpexch(P,O,N) __sync_bool_compare_and_swap ((P), (O), (N))
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#elif !defined(HB_NO_MT) && defined(HAVE_SOLARIS_ATOMIC_OPS)
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#include <atomic.h>
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#include <mbarrier.h>
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typedef unsigned int hb_atomic_int_t;
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#define hb_atomic_int_add(AI, V) ( ({__machine_rw_barrier ();}), atomic_add_int_nv (&(AI), (V)) - (V))
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#define hb_atomic_ptr_get(P) ( ({__machine_rw_barrier ();}), (void *) *(P))
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#define hb_atomic_ptr_cmpexch(P,O,N) ( ({__machine_rw_barrier ();}), atomic_cas_ptr ((void **) (P), (void *) (O), (void *) (N)) == (void *) (O) ? true : false)
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#elif !defined(HB_NO_MT)
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#define HB_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */
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typedef volatile int hb_atomic_int_t;
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#define hb_atomic_int_add(AI, V) (((AI) += (V)) - (V))
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#define hb_atomic_ptr_get(P) ((void *) *(P))
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#define hb_atomic_ptr_cmpexch(P,O,N) (* (void * volatile *) (P) == (void *) (O) ? (* (void * volatile *) (P) = (void *) (N), true) : false)
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#else /* HB_NO_MT */
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typedef int hb_atomic_int_t;
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#define hb_atomic_int_add(AI, V) (((AI) += (V)) - (V))
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#define hb_atomic_ptr_get(P) ((void *) *(P))
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#define hb_atomic_ptr_cmpexch(P,O,N) (* (void **) (P) == (void *) (O) ? (* (void **) (P) = (void *) (N), true) : false)
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#endif
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/* TODO Add tracing. */
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#endif /* HB_ATOMIC_PRIVATE_HH */
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