2 * Copyright © 2007 Chris Wilson
3 * Copyright © 2009,2010 Red Hat, Inc.
4 * Copyright © 2011,2012 Google, Inc.
6 * This is part of HarfBuzz, a text shaping library.
8 * Permission is hereby granted, without written agreement and without
9 * license or royalty fees, to use, copy, modify, and distribute this
10 * software and its documentation for any purpose, provided that the
11 * above copyright notice and the following two paragraphs appear in
12 * all copies of this software.
14 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
15 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
16 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
17 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
20 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
21 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
22 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
23 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
24 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
27 * Chris Wilson <chris@chris-wilson.co.uk>
28 * Red Hat Author(s): Behdad Esfahbod
29 * Google Author(s): Behdad Esfahbod
32 #ifndef HB_ATOMIC_PRIVATE_HH
33 #define HB_ATOMIC_PRIVATE_HH
35 #include "hb-private.hh"
40 /* We need external help for these */
45 #elif !defined(HB_NO_MT) && defined(_MSC_VER) && _MSC_VER >= 1600
48 /* On x86, _InterlockedCompareExchangePointer is a macro defined in concrt.h */
51 typedef long hb_atomic_int_t;
52 #define hb_atomic_int_add(AI, V) _InterlockedExchangeAdd (&(AI), (V))
54 #define hb_atomic_ptr_get(P) (MemoryBarrier (), (void *) *(P))
55 #define hb_atomic_ptr_cmpexch(P,O,N) (_InterlockedCompareExchangePointer ((void **) (P), (void *) (N), (void *) (O)) == (void *) (O))
58 #elif !defined(HB_NO_MT) && defined(__APPLE__)
60 #include <libkern/OSAtomic.h>
62 typedef int32_t hb_atomic_int_t;
63 #define hb_atomic_int_add(AI, V) (OSAtomicAdd32Barrier ((V), &(AI)) - (V))
65 #define hb_atomic_ptr_get(P) (OSMemoryBarrier (), (void *) *(P))
66 #define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P))
69 #elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES)
71 typedef int hb_atomic_int_t;
72 #define hb_atomic_int_add(AI, V) __sync_fetch_and_add (&(AI), (V))
74 #define hb_atomic_ptr_get(P) (void *) (__sync_synchronize (), *(P))
75 #define hb_atomic_ptr_cmpexch(P,O,N) __sync_bool_compare_and_swap ((P), (O), (N))
77 #elif !defined(HB_NO_MT) && defined(HAVE_GLIB)
80 typedef int hb_atomic_int_t;
81 #if GLIB_CHECK_VERSION(2,29,5)
82 #define hb_atomic_int_add(AI, V) g_atomic_int_add (&(AI), (V))
84 #define hb_atomic_int_add(AI, V) g_atomic_int_exchange_and_add (&(AI), (V))
87 #define hb_atomic_ptr_get(P) g_atomic_pointer_get (P)
88 #define hb_atomic_ptr_cmpexch(P,O,N) g_atomic_pointer_compare_and_exchange ((void **) (P), (void *) (O), (void *) (N))
91 #elif !defined(HB_NO_MT)
93 #define HB_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */
94 typedef volatile int hb_atomic_int_t;
95 #define hb_atomic_int_add(AI, V) (((AI) += (V)) - (V))
97 #define hb_atomic_ptr_get(P) ((void *) *(P))
98 #define hb_atomic_ptr_cmpexch(P,O,N) (* (void * volatile *) (P) == (void *) (O) ? (* (void * volatile *) (P) = (void *) (N), true) : false)
103 typedef int hb_atomic_int_t;
104 #define hb_atomic_int_add(AI, V) (((AI) += (V)) - (V))
106 #define hb_atomic_ptr_get(P) ((void *) *(P))
107 #define hb_atomic_ptr_cmpexch(P,O,N) (* (void **) (P) == (void *) (O) ? (* (void **) (P) = (void *) (N), true) : false)
111 /* TODO Add tracing. */
113 #endif /* HB_ATOMIC_PRIVATE_HH */