diff options
Diffstat (limited to 'gfx/harfbuzz/src/hb-atomic-private.hh')
| -rw-r--r-- | gfx/harfbuzz/src/hb-atomic-private.hh | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-atomic-private.hh b/gfx/harfbuzz/src/hb-atomic-private.hh new file mode 100644 index 000000000..100ba539e --- /dev/null +++ b/gfx/harfbuzz/src/hb-atomic-private.hh @@ -0,0 +1,189 @@ +/* + * Copyright © 2007 Chris Wilson + * Copyright © 2009,2010 Red Hat, Inc. + * Copyright © 2011,2012 Google, Inc. + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + * + * Contributor(s): + * Chris Wilson <chris@chris-wilson.co.uk> + * Red Hat Author(s): Behdad Esfahbod + * Google Author(s): Behdad Esfahbod + */ + +#ifndef HB_ATOMIC_PRIVATE_HH +#define HB_ATOMIC_PRIVATE_HH + +#include "hb-private.hh" + + +/* atomic_int */ + +/* We need external help for these */ + +#if defined(hb_atomic_int_impl_add) \ + && defined(hb_atomic_ptr_impl_get) \ + && defined(hb_atomic_ptr_impl_cmpexch) + +/* Defined externally, i.e. in config.h; must have typedef'ed hb_atomic_int_impl_t as well. */ + + +#elif !defined(HB_NO_MT) && (defined(_WIN32) || defined(__CYGWIN__)) + +#include <windows.h> + +/* MinGW has a convoluted history of supporting MemoryBarrier + * properly. As such, define a function to wrap the whole + * thing. */ +static inline void _HBMemoryBarrier (void) { +#if !defined(MemoryBarrier) + long dummy = 0; + InterlockedExchange (&dummy, 1); +#else + MemoryBarrier (); +#endif +} + +typedef LONG hb_atomic_int_impl_t; +#define HB_ATOMIC_INT_IMPL_INIT(V) (V) +#define hb_atomic_int_impl_add(AI, V) InterlockedExchangeAdd (&(AI), (V)) + +#define hb_atomic_ptr_impl_get(P) (_HBMemoryBarrier (), (void *) *(P)) +#define hb_atomic_ptr_impl_cmpexch(P,O,N) (InterlockedCompareExchangePointer ((void **) (P), (void *) (N), (void *) (O)) == (void *) (O)) + + +#elif !defined(HB_NO_MT) && defined(__APPLE__) + +#include <libkern/OSAtomic.h> +#ifdef __MAC_OS_X_MIN_REQUIRED +#include <AvailabilityMacros.h> +#elif defined(__IPHONE_OS_MIN_REQUIRED) +#include <Availability.h> +#endif + + +typedef int32_t hb_atomic_int_impl_t; +#define HB_ATOMIC_INT_IMPL_INIT(V) (V) +#define hb_atomic_int_impl_add(AI, V) (OSAtomicAdd32Barrier ((V), &(AI)) - (V)) + +#define hb_atomic_ptr_impl_get(P) (OSMemoryBarrier (), (void *) *(P)) +#if (MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_4 || __IPHONE_VERSION_MIN_REQUIRED >= 20100) +#define hb_atomic_ptr_impl_cmpexch(P,O,N) OSAtomicCompareAndSwapPtrBarrier ((void *) (O), (void *) (N), (void **) (P)) +#else +#if __ppc64__ || __x86_64__ || __aarch64__ +#define hb_atomic_ptr_impl_cmpexch(P,O,N) OSAtomicCompareAndSwap64Barrier ((int64_t) (O), (int64_t) (N), (int64_t*) (P)) +#else +#define hb_atomic_ptr_impl_cmpexch(P,O,N) OSAtomicCompareAndSwap32Barrier ((int32_t) (O), (int32_t) (N), (int32_t*) (P)) +#endif +#endif + + +#elif !defined(HB_NO_MT) && defined(HAVE_INTEL_ATOMIC_PRIMITIVES) + +typedef int hb_atomic_int_impl_t; +#define HB_ATOMIC_INT_IMPL_INIT(V) (V) +#define hb_atomic_int_impl_add(AI, V) __sync_fetch_and_add (&(AI), (V)) + +#define hb_atomic_ptr_impl_get(P) (void *) (__sync_synchronize (), *(P)) +#define hb_atomic_ptr_impl_cmpexch(P,O,N) __sync_bool_compare_and_swap ((P), (O), (N)) + + +#elif !defined(HB_NO_MT) && defined(HAVE_SOLARIS_ATOMIC_OPS) + +#include <atomic.h> +#include <mbarrier.h> + +typedef unsigned int hb_atomic_int_impl_t; +#define HB_ATOMIC_INT_IMPL_INIT(V) (V) +#define hb_atomic_int_impl_add(AI, V) ( ({__machine_rw_barrier ();}), atomic_add_int_nv (&(AI), (V)) - (V)) + +#define hb_atomic_ptr_impl_get(P) ( ({__machine_rw_barrier ();}), (void *) *(P)) +#define hb_atomic_ptr_impl_cmpexch(P,O,N) ( ({__machine_rw_barrier ();}), atomic_cas_ptr ((void **) (P), (void *) (O), (void *) (N)) == (void *) (O) ? true : false) + + +#elif !defined(HB_NO_MT) && defined(_AIX) && defined(__IBMCPP__) + +#include <builtins.h> + + +static inline int hb_fetch_and_add(volatile int* AI, unsigned int V) { + __lwsync(); + int result = __fetch_and_add(AI, V); + __isync(); + return result; +} +static inline int hb_compare_and_swaplp(volatile long* P, long O, long N) { + __sync(); + int result = __compare_and_swaplp (P, &O, N); + __sync(); + return result; +} + +typedef int hb_atomic_int_impl_t; +#define HB_ATOMIC_INT_IMPL_INIT(V) (V) +#define hb_atomic_int_impl_add(AI, V) hb_fetch_and_add (&(AI), (V)) + +#define hb_atomic_ptr_impl_get(P) (__sync(), (void *) *(P)) +#define hb_atomic_ptr_impl_cmpexch(P,O,N) hb_compare_and_swaplp ((long*)(P), (long)(O), (long)(N)) + +#elif !defined(HB_NO_MT) + +#define HB_ATOMIC_INT_NIL 1 /* Warn that fallback implementation is in use. */ + +typedef volatile int hb_atomic_int_impl_t; +#define HB_ATOMIC_INT_IMPL_INIT(V) (V) +#define hb_atomic_int_impl_add(AI, V) (((AI) += (V)) - (V)) + +#define hb_atomic_ptr_impl_get(P) ((void *) *(P)) +#define hb_atomic_ptr_impl_cmpexch(P,O,N) (* (void * volatile *) (P) == (void *) (O) ? (* (void * volatile *) (P) = (void *) (N), true) : false) + + +#else /* HB_NO_MT */ + +typedef int hb_atomic_int_impl_t; +#define HB_ATOMIC_INT_IMPL_INIT(V) (V) +#define hb_atomic_int_impl_add(AI, V) (((AI) += (V)) - (V)) + +#define hb_atomic_ptr_impl_get(P) ((void *) *(P)) +#define hb_atomic_ptr_impl_cmpexch(P,O,N) (* (void **) (P) == (void *) (O) ? (* (void **) (P) = (void *) (N), true) : false) + + +#endif + + +#define HB_ATOMIC_INT_INIT(V) {HB_ATOMIC_INT_IMPL_INIT(V)} + +struct hb_atomic_int_t +{ + hb_atomic_int_impl_t v; + + inline void set_unsafe (int v_) { v = v_; } + inline int get_unsafe (void) const { return v; } + inline int inc (void) { return hb_atomic_int_impl_add (const_cast<hb_atomic_int_impl_t &> (v), 1); } + inline int dec (void) { return hb_atomic_int_impl_add (const_cast<hb_atomic_int_impl_t &> (v), -1); } +}; + + +#define hb_atomic_ptr_get(P) hb_atomic_ptr_impl_get(P) +#define hb_atomic_ptr_cmpexch(P,O,N) hb_atomic_ptr_impl_cmpexch((P),(O),(N)) + + +#endif /* HB_ATOMIC_PRIVATE_HH */ |