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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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, 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.
*
* Contributor(s):
* Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairoint.h"
#include "cairo-atomic-private.h"
#include "cairo-mutex-private.h"
#ifdef HAS_ATOMIC_OPS
COMPILE_TIME_ASSERT(sizeof(void*) == sizeof(int) ||
sizeof(void*) == sizeof(long) ||
sizeof(void*) == sizeof(long long));
#else
void
_cairo_atomic_int_inc (cairo_atomic_intptr_t *x)
{
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
*x += 1;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
}
cairo_bool_t
_cairo_atomic_int_dec_and_test (cairo_atomic_intptr_t *x)
{
cairo_bool_t ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = --*x == 0;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
cairo_atomic_intptr_t
_cairo_atomic_int_cmpxchg_return_old_impl (cairo_atomic_intptr_t *x, cairo_atomic_intptr_t oldv, cairo_atomic_intptr_t newv)
{
cairo_atomic_intptr_t ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = *x;
if (ret == oldv)
*x = newv;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
void *
_cairo_atomic_ptr_cmpxchg_return_old_impl (void **x, void *oldv, void *newv)
{
void *ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = *x;
if (ret == oldv)
*x = newv;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
#ifdef ATOMIC_OP_NEEDS_MEMORY_BARRIER
cairo_atomic_intptr_t
_cairo_atomic_int_get (cairo_atomic_intptr_t *x)
{
cairo_atomic_intptr_t ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = *x;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
#endif
#endif
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