1 /* 2 * Copyright 2007 Chris Wilson 3 * Copyright 2009,2010 Red Hat, Inc. 4 * Copyright 2011,2012 Google, Inc. 5 * 6 * This is part of HarfBuzz, a text shaping library. 7 * 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. 13 * 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 18 * DAMAGE. 19 * 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. 25 * 26 * Contributor(s): 27 * Chris Wilson <chris (at) chris-wilson.co.uk> 28 * Red Hat Author(s): Behdad Esfahbod 29 * Google Author(s): Behdad Esfahbod 30 */ 31 32 #ifndef HB_ATOMIC_PRIVATE_HH 33 #define HB_ATOMIC_PRIVATE_HH 34 35 #include "hb-private.hh" 36 37 38 /* atomic_int */ 39 40 /* We need external help for these */ 41 42 #if 0 43 44 45 #elif !defined(HB_NO_MT) && (defined(_WIN32) || defined(__CYGWIN__)) 46 47 #define WIN32_LEAN_AND_MEAN 48 #include <windows.h> 49 50 typedef LONG hb_atomic_int_t; 51 #define hb_atomic_int_add(AI, V) InterlockedExchangeAdd (&(AI), (V)) 52 53 #define hb_atomic_ptr_get(P) (MemoryBarrier (), (void *) *(P)) 54 #define hb_atomic_ptr_cmpexch(P,O,N) (InterlockedCompareExchangePointer ((void **) (P), (void *) (N), (void *) (O)) == (void *) (O)) 55 56 57 #elif !defined(HB_NO_MT) && defined(__APPLE__) 58 59 #include <libkern/OSAtomic.h> 60 #ifdef __MAC_OS_X_MIN_REQUIRED 61 #include <AvailabilityMacros.h> 62 #elif defined(__IPHONE_OS_MIN_REQUIRED) 63 #include <Availability.h> 64 #endif 65 66 typedef int32_t hb_atomic_int_t; 67 #define hb_atomic_int_add(AI, V) (OSAtomicAdd32Barrier ((V), &(AI)) - (V)) 68 69 #define hb_atomic_ptr_get(P) (OSMemoryBarrier (), (void *) *(P)) 70 #if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_VERSION_MIN_REQUIRED >= 20100) 71 #define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P)) 72 #else 73 #if __ppc64__ || __x86_64__ 74 #define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwap64Barrier ((int64_t) (O), (int64_t) (N), (int64_t*) (P)) 75 #else 76 #define hb_atomic_ptr_cmpexch(P,O,N) OSAtomicCompareAndSwap32Barrier ((int32_t) (O), (int32_t) (N), (int32_t*) (P)) 77 #endif 78 #endif 79 80 81 #elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES) 82 83 typedef int hb_atomic_int_t; 84 #define hb_atomic_int_add(AI, V) __sync_fetch_and_add (&(AI), (V)) 85 86 #define hb_atomic_ptr_get(P) (void *) (__sync_synchronize (), *(P)) 87 #define hb_atomic_ptr_cmpexch(P,O,N) __sync_bool_compare_and_swap ((P), (O), (N)) 88 89 90 #elif !defined(HB_NO_MT) && defined(HAVE_SOLARIS_ATOMIC_OPS) 91 92 #include <atomic.h> 93 #include <mbarrier.h> 94 95 typedef unsigned int hb_atomic_int_t; 96 #define hb_atomic_int_add(AI, V) ( ({__machine_rw_barrier ();}), atomic_add_int_nv (&(AI), (V)) - (V)) 97 98 #define hb_atomic_ptr_get(P) ( ({__machine_rw_barrier ();}), (void *) *(P)) 99 #define hb_atomic_ptr_cmpexch(P,O,N) ( ({__machine_rw_barrier ();}), atomic_cas_ptr ((void **) (P), (void *) (O), (void *) (N)) == (void *) (O) ? true : false) 100 101 102 #elif !defined(HB_NO_MT) 103 104 #define HB_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */ 105 typedef volatile int hb_atomic_int_t; 106 #define hb_atomic_int_add(AI, V) (((AI) += (V)) - (V)) 107 108 #define hb_atomic_ptr_get(P) ((void *) *(P)) 109 #define hb_atomic_ptr_cmpexch(P,O,N) (* (void * volatile *) (P) == (void *) (O) ? (* (void * volatile *) (P) = (void *) (N), true) : false) 110 111 112 #else /* HB_NO_MT */ 113 114 typedef int hb_atomic_int_t; 115 #define hb_atomic_int_add(AI, V) (((AI) += (V)) - (V)) 116 117 #define hb_atomic_ptr_get(P) ((void *) *(P)) 118 #define hb_atomic_ptr_cmpexch(P,O,N) (* (void **) (P) == (void *) (O) ? (* (void **) (P) = (void *) (N), true) : false) 119 120 #endif 121 122 /* TODO Add tracing. */ 123 124 #endif /* HB_ATOMIC_PRIVATE_HH */ 125
