| /* 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 |