0,0 → 1,106 |
/* 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 |