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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2007 Chris Wilson
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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>
*/
#ifndef CAIRO_ATOMIC_PRIVATE_H
#define CAIRO_ATOMIC_PRIVATE_H
#if HAVE_CONFIG_H
#include "config.h"
#endif
CAIRO_BEGIN_DECLS
#define CAIRO_HAS_ATOMIC_OPS 1
#if CAIRO_HAS_INTEL_ATOMIC_PRIMITIVES
typedef int cairo_atomic_int_t;
# define _cairo_atomic_int_inc(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_val_compare_and_swap (x, oldv, newv)
#else
# include "cairo-compiler-private.h"
# undef CAIRO_HAS_ATOMIC_OPS
typedef int cairo_atomic_int_t;
cairo_private void
_cairo_atomic_int_inc (int *x);
cairo_private cairo_bool_t
_cairo_atomic_int_dec_and_test (int *x);
cairo_private int
_cairo_atomic_int_cmpxchg (int *x, int oldv, int newv);
#endif
#ifdef CAIRO_ATOMIC_OP_NEEDS_MEMORY_BARRIER
# include "cairo-compiler-private.h"
cairo_private int
_cairo_atomic_int_get (int *x);
cairo_private void
_cairo_atomic_int_set (int *x, int value);
#else
# define _cairo_atomic_int_get(x) (*x)
# define _cairo_atomic_int_set(x, value) ((*x) = value)
#endif
#define _cairo_status_set_error(status, err) do { \
/* hide compiler warnings about cairo_status_t != int (gcc treats its as \
* an unsigned integer instead, and about ignoring the return value. */ \
int ret__ = _cairo_atomic_int_cmpxchg ((int *) status, CAIRO_STATUS_SUCCESS, err); \
(void) ret__; \
} while (0)
CAIRO_END_DECLS
#endif
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