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