/* 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_int_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_int_t *x)
{
cairo_bool_t ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = --*x == 0 ;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
int
_cairo_atomic_int_cmpxchg_return_old_impl (cairo_atomic_int_t *x, int oldv, int newv)
{
int 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 (cairo_atomic_intptr_t *x, void *oldv, void *newv)
{
void *ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = (void *) *x;
if (ret == oldv)
*x = (cairo_atomic_intptr_t) newv;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
#ifdef ATOMIC_OP_NEEDS_MEMORY_BARRIER
int
_cairo_atomic_int_get (cairo_atomic_int_t *x)
{
int ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = *x;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
int
_cairo_atomic_int_get_relaxed (cairo_atomic_int_t *x)
{
return _cairo_atomic_int_get (x);
}
void
_cairo_atomic_int_set_relaxed (cairo_atomic_int_t *x, int val)
{
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
*x = val;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
}
void *
_cairo_atomic_ptr_get (void **x)
{
void *ret;
CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
ret = *x;
CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
return ret;
}
#endif
#endif
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