forked from KolibriOS/kolibrios
107 lines
2.9 KiB
C
107 lines
2.9 KiB
C
/* 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
|