| 0,0 → 1,272 |
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| /* cairo - a vector graphics library with display and print output |
| * |
| * Copyright © 2007 Chris Wilson |
| * Copyright © 2010 Andrea Canciani |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it either under the terms of the GNU Lesser General Public |
| * License version 2.1 as published by the Free Software Foundation |
| * (the "LGPL") or, at your option, under the terms of the Mozilla |
| * Public License Version 1.1 (the "MPL"). If you do not alter this |
| * notice, a recipient may use your version of this file under either |
| * the MPL or the LGPL. |
| * |
| * You should have received a copy of the LGPL along with this library |
| * in the file COPYING-LGPL-2.1; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA |
| * You should have received a copy of the MPL along with this library |
| * in the file COPYING-MPL-1.1 |
| * |
| * The contents of this file are subject to the Mozilla Public License |
| * Version 1.1 (the "License"); you may not use this file except in |
| * compliance with the License. You may obtain a copy of the License at |
| * http://www.mozilla.org/MPL/ |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY |
| * OF ANY KIND, either express or implied. See the LGPL or the MPL for |
| * the specific language governing rights and limitations. |
| * |
| * The Original Code is the cairo graphics library. |
| * |
| * The Initial Developer of the Original Code is University of Southern |
| * California. |
| * |
| * Contributor(s): |
| * Chris Wilson <chris@chris-wilson.co.uk> |
| * Andrea Canciani <ranma42@gmail.com> |
| */ |
| |
| #ifndef CAIRO_ATOMIC_PRIVATE_H |
| #define CAIRO_ATOMIC_PRIVATE_H |
| |
| # include "cairo-compiler-private.h" |
| |
| #if HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| /* The autoconf on OpenBSD 4.5 produces the malformed constant name |
| * SIZEOF_VOID__ rather than SIZEOF_VOID_P. Work around that here. */ |
| #if !defined(SIZEOF_VOID_P) && defined(SIZEOF_VOID__) |
| # define SIZEOF_VOID_P SIZEOF_VOID__ |
| #endif |
| |
| CAIRO_BEGIN_DECLS |
| |
| #if HAVE_INTEL_ATOMIC_PRIMITIVES |
| |
| #define HAS_ATOMIC_OPS 1 |
| |
| typedef int cairo_atomic_int_t; |
| |
| #ifdef ATOMIC_OP_NEEDS_MEMORY_BARRIER |
| static cairo_always_inline cairo_atomic_int_t |
| _cairo_atomic_int_get (cairo_atomic_int_t *x) |
| { |
| __sync_synchronize (); |
| return *x; |
| } |
| |
| static cairo_always_inline void * |
| _cairo_atomic_ptr_get (void **x) |
| { |
| __sync_synchronize (); |
| return *x; |
| } |
| #else |
| # define _cairo_atomic_int_get(x) (*x) |
| # define _cairo_atomic_ptr_get(x) (*x) |
| #endif |
| |
| # define _cairo_atomic_int_inc(x) ((void) __sync_fetch_and_add(x, 1)) |
| # define _cairo_atomic_int_dec(x) ((void) __sync_fetch_and_add(x, -1)) |
| # define _cairo_atomic_int_dec_and_test(x) (__sync_fetch_and_add(x, -1) == 1) |
| # define _cairo_atomic_int_cmpxchg(x, oldv, newv) __sync_bool_compare_and_swap (x, oldv, newv) |
| # define _cairo_atomic_int_cmpxchg_return_old(x, oldv, newv) __sync_val_compare_and_swap (x, oldv, newv) |
| |
| #if SIZEOF_VOID_P==SIZEOF_INT |
| typedef int cairo_atomic_intptr_t; |
| #elif SIZEOF_VOID_P==SIZEOF_LONG |
| typedef long cairo_atomic_intptr_t; |
| #elif SIZEOF_VOID_P==SIZEOF_LONG_LONG |
| typedef long long cairo_atomic_intptr_t; |
| #else |
| #error No matching integer pointer type |
| #endif |
| |
| # define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) \ |
| __sync_bool_compare_and_swap ((cairo_atomic_intptr_t*)x, (cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv) |
| |
| # define _cairo_atomic_ptr_cmpxchg_return_old(x, oldv, newv) \ |
| _cairo_atomic_intptr_to_voidptr (__sync_val_compare_and_swap ((cairo_atomic_intptr_t*)x, (cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv)) |
| |
| #endif |
| |
| #if HAVE_LIB_ATOMIC_OPS |
| #include <atomic_ops.h> |
| |
| #define HAS_ATOMIC_OPS 1 |
| |
| typedef AO_t cairo_atomic_int_t; |
| |
| # define _cairo_atomic_int_get(x) (AO_load_full (x)) |
| |
| # define _cairo_atomic_int_inc(x) ((void) AO_fetch_and_add1_full(x)) |
| # define _cairo_atomic_int_dec(x) ((void) AO_fetch_and_sub1_full(x)) |
| # define _cairo_atomic_int_dec_and_test(x) (AO_fetch_and_sub1_full(x) == 1) |
| # define _cairo_atomic_int_cmpxchg(x, oldv, newv) AO_compare_and_swap_full(x, oldv, newv) |
| |
| #if SIZEOF_VOID_P==SIZEOF_INT |
| typedef unsigned int cairo_atomic_intptr_t; |
| #elif SIZEOF_VOID_P==SIZEOF_LONG |
| typedef unsigned long cairo_atomic_intptr_t; |
| #elif SIZEOF_VOID_P==SIZEOF_LONG_LONG |
| typedef unsigned long long cairo_atomic_intptr_t; |
| #else |
| #error No matching integer pointer type |
| #endif |
| |
| # define _cairo_atomic_ptr_get(x) _cairo_atomic_intptr_to_voidptr (AO_load_full (x)) |
| # define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) \ |
| _cairo_atomic_int_cmpxchg ((cairo_atomic_intptr_t*)(x), (cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv) |
| |
| #endif |
| |
| #if HAVE_OS_ATOMIC_OPS |
| #include <libkern/OSAtomic.h> |
| |
| #define HAS_ATOMIC_OPS 1 |
| |
| typedef int32_t cairo_atomic_int_t; |
| |
| # define _cairo_atomic_int_get(x) (OSMemoryBarrier(), *(x)) |
| |
| # define _cairo_atomic_int_inc(x) ((void) OSAtomicIncrement32Barrier (x)) |
| # define _cairo_atomic_int_dec(x) ((void) OSAtomicDecrement32Barrier (x)) |
| # define _cairo_atomic_int_dec_and_test(x) (OSAtomicDecrement32Barrier (x) == 0) |
| # define _cairo_atomic_int_cmpxchg(x, oldv, newv) OSAtomicCompareAndSwap32Barrier(oldv, newv, x) |
| |
| #if SIZEOF_VOID_P==4 |
| typedef int32_t cairo_atomic_intptr_t; |
| # define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) \ |
| OSAtomicCompareAndSwap32Barrier((cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv, (cairo_atomic_intptr_t *)x) |
| |
| #elif SIZEOF_VOID_P==8 |
| typedef int64_t cairo_atomic_intptr_t; |
| # define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) \ |
| OSAtomicCompareAndSwap64Barrier((cairo_atomic_intptr_t)oldv, (cairo_atomic_intptr_t)newv, (cairo_atomic_intptr_t *)x) |
| |
| #else |
| #error No matching integer pointer type |
| #endif |
| |
| # define _cairo_atomic_ptr_get(x) (OSMemoryBarrier(), *(x)) |
| |
| #endif |
| |
| #ifndef HAS_ATOMIC_OPS |
| |
| #if SIZEOF_VOID_P==SIZEOF_INT |
| typedef unsigned int cairo_atomic_intptr_t; |
| #elif SIZEOF_VOID_P==SIZEOF_LONG |
| typedef unsigned long cairo_atomic_intptr_t; |
| #elif SIZEOF_VOID_P==SIZEOF_LONG_LONG |
| typedef unsigned long long cairo_atomic_intptr_t; |
| #else |
| #error No matching integer pointer type |
| #endif |
| |
| typedef cairo_atomic_intptr_t cairo_atomic_int_t; |
| |
| cairo_private void |
| _cairo_atomic_int_inc (cairo_atomic_int_t *x); |
| |
| #define _cairo_atomic_int_dec(x) _cairo_atomic_int_dec_and_test(x) |
| |
| cairo_private cairo_bool_t |
| _cairo_atomic_int_dec_and_test (cairo_atomic_int_t *x); |
| |
| cairo_private cairo_atomic_int_t |
| _cairo_atomic_int_cmpxchg_return_old_impl (cairo_atomic_int_t *x, cairo_atomic_int_t oldv, cairo_atomic_int_t newv); |
| |
| cairo_private void * |
| _cairo_atomic_ptr_cmpxchg_return_old_impl (void **x, void *oldv, void *newv); |
| |
| #define _cairo_atomic_int_cmpxchg_return_old(x, oldv, newv) _cairo_atomic_int_cmpxchg_return_old_impl (x, oldv, newv) |
| #define _cairo_atomic_ptr_cmpxchg_return_old(x, oldv, newv) _cairo_atomic_ptr_cmpxchg_return_old_impl (x, oldv, newv) |
| |
| #ifdef ATOMIC_OP_NEEDS_MEMORY_BARRIER |
| cairo_private cairo_atomic_int_t |
| _cairo_atomic_int_get (cairo_atomic_int_t *x); |
| # define _cairo_atomic_ptr_get(x) (void *) _cairo_atomic_int_get((cairo_atomic_int_t *) x) |
| #else |
| # define _cairo_atomic_int_get(x) (*x) |
| # define _cairo_atomic_ptr_get(x) (*x) |
| #endif |
| |
| #else |
| |
| /* Workaround GCC complaining about casts */ |
| static cairo_always_inline void * |
| _cairo_atomic_intptr_to_voidptr (cairo_atomic_intptr_t x) |
| { |
| return (void *) x; |
| } |
| |
| static cairo_always_inline cairo_atomic_int_t |
| _cairo_atomic_int_cmpxchg_return_old_fallback(cairo_atomic_int_t *x, cairo_atomic_int_t oldv, cairo_atomic_int_t newv) |
| { |
| cairo_atomic_int_t curr; |
| |
| do { |
| curr = _cairo_atomic_int_get (x); |
| } while (curr == oldv && !_cairo_atomic_int_cmpxchg (x, oldv, newv)); |
| |
| return curr; |
| } |
| |
| static cairo_always_inline void * |
| _cairo_atomic_ptr_cmpxchg_return_old_fallback(void **x, void *oldv, void *newv) |
| { |
| void *curr; |
| |
| do { |
| curr = _cairo_atomic_ptr_get (x); |
| } while (curr == oldv && !_cairo_atomic_ptr_cmpxchg (x, oldv, newv)); |
| |
| return curr; |
| } |
| #endif |
| |
| #ifndef _cairo_atomic_int_cmpxchg_return_old |
| #define _cairo_atomic_int_cmpxchg_return_old(x, oldv, newv) _cairo_atomic_int_cmpxchg_return_old_fallback (x, oldv, newv) |
| #endif |
| |
| #ifndef _cairo_atomic_ptr_cmpxchg_return_old |
| #define _cairo_atomic_ptr_cmpxchg_return_old(x, oldv, newv) _cairo_atomic_ptr_cmpxchg_return_old_fallback (x, oldv, newv) |
| #endif |
| |
| #ifndef _cairo_atomic_int_cmpxchg |
| #define _cairo_atomic_int_cmpxchg(x, oldv, newv) (_cairo_atomic_int_cmpxchg_return_old (x, oldv, newv) == oldv) |
| #endif |
| |
| #ifndef _cairo_atomic_ptr_cmpxchg |
| #define _cairo_atomic_ptr_cmpxchg(x, oldv, newv) (_cairo_atomic_ptr_cmpxchg_return_old (x, oldv, newv) == oldv) |
| #endif |
| |
| #define _cairo_atomic_uint_get(x) _cairo_atomic_int_get(x) |
| #define _cairo_atomic_uint_cmpxchg(x, oldv, newv) \ |
| _cairo_atomic_int_cmpxchg((cairo_atomic_int_t *)x, oldv, newv) |
| |
| #define _cairo_status_set_error(status, err) do { \ |
| int ret__; \ |
| assert (err < CAIRO_STATUS_LAST_STATUS); \ |
| /* hide compiler warnings about cairo_status_t != int (gcc treats its as \ |
| * an unsigned integer instead, and about ignoring the return value. */ \ |
| ret__ = _cairo_atomic_int_cmpxchg ((cairo_atomic_int_t *) status, CAIRO_STATUS_SUCCESS, err); \ |
| (void) ret__; \ |
| } while (0) |
| |
| CAIRO_END_DECLS |
| |
| #endif |