/* 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 # include "cairo-compiler-private.h" #if HAVE_CONFIG_H #include "config.h" #endif CAIRO_BEGIN_DECLS #if HAVE_INTEL_ATOMIC_PRIMITIVES #define HAS_ATOMIC_OPS 1 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) #endif #ifndef 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 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