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14952 fschmid 1
/* 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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 *
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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, Fifth Floor, Boston, MA 02110-1301 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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 */
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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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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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# define _cairo_atomic_int_inc(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_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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    (void*)__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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#ifndef HAS_ATOMIC_OPS
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typedef int cairo_atomic_int_t;
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cairo_private void
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_cairo_atomic_int_inc (int *x);
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cairo_private cairo_bool_t
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_cairo_atomic_int_dec_and_test (int *x);
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cairo_private int
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_cairo_atomic_int_cmpxchg (int *x, int oldv, int newv);
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cairo_private void *
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_cairo_atomic_ptr_cmpxchg (void **x, void *oldv, void *newv);
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#endif
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#ifdef ATOMIC_OP_NEEDS_MEMORY_BARRIER
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# include "cairo-compiler-private.h"
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cairo_private int
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_cairo_atomic_int_get (int *x);
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cairo_private void
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_cairo_atomic_int_set (int *x, int value);
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#else
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# define _cairo_atomic_int_get(x) (*x)
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# define _cairo_atomic_int_set(x, value) ((*x) = value)
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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((int *)x, oldv, newv)
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#define _cairo_status_set_error(status, err) do { \
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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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    int ret__ = _cairo_atomic_int_cmpxchg ((int *) 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