mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2026-05-18 16:28:07 +02:00
af9fbd176b
Having spent the last dev cycle looking at how we could specialize the compositors for various backends, we once again look for the commonalities in order to reduce the duplication. In part this is motivated by the idea that spans is a good interface for both the existent GL backend and pixman, and so they deserve a dedicated compositor. xcb/xlib target an identical rendering system and so they should be using the same compositor, and it should be possible to run that same compositor locally against pixman to generate reference tests. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> P.S. This brings massive upheaval (read breakage) I've tried delaying in order to fix as many things as possible but now this one patch does far, far, far too much. Apologies in advance for breaking your favourite backend, but trust me in that the end result will be much better. :)
272 lines
8.9 KiB
C
272 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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