LCOV - code coverage report
Current view: directory - gfx/cairo/cairo/src - cairo-atomic.c (source / functions) Found Hit Coverage
Test: app.info Lines: 16 6 37.5 %
Date: 2012-06-02 Functions: 4 2 50.0 %

       1                 : /* cairo - a vector graphics library with display and print output
       2                 :  *
       3                 :  * Copyright © 2007 Chris Wilson
       4                 :  *
       5                 :  * This library is free software; you can redistribute it and/or
       6                 :  * modify it either under the terms of the GNU Lesser General Public
       7                 :  * License version 2.1 as published by the Free Software Foundation
       8                 :  * (the "LGPL") or, at your option, under the terms of the Mozilla
       9                 :  * Public License Version 1.1 (the "MPL"). If you do not alter this
      10                 :  * notice, a recipient may use your version of this file under either
      11                 :  * the MPL or the LGPL.
      12                 :  *
      13                 :  * You should have received a copy of the LGPL along with this library
      14                 :  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
      15                 :  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
      16                 :  * You should have received a copy of the MPL along with this library
      17                 :  * in the file COPYING-MPL-1.1
      18                 :  *
      19                 :  * The contents of this file are subject to the Mozilla Public License
      20                 :  * Version 1.1 (the "License"); you may not use this file except in
      21                 :  * compliance with the License. You may obtain a copy of the License at
      22                 :  * http://www.mozilla.org/MPL/
      23                 :  *
      24                 :  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
      25                 :  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
      26                 :  * the specific language governing rights and limitations.
      27                 :  *
      28                 :  * The Original Code is the cairo graphics library.
      29                 :  *
      30                 :  * Contributor(s):
      31                 :  *      Chris Wilson <chris@chris-wilson.co.uk>
      32                 :  */
      33                 : 
      34                 : #include "cairoint.h"
      35                 : 
      36                 : #include "cairo-atomic-private.h"
      37                 : #include "cairo-mutex-private.h"
      38                 : 
      39                 : #ifdef HAS_ATOMIC_OPS
      40                 : COMPILE_TIME_ASSERT(sizeof(void*) == sizeof(int) ||
      41                 :                     sizeof(void*) == sizeof(long) ||
      42                 :                     sizeof(void*) == sizeof(long long));
      43                 : #else
      44                 : void
      45             300 : _cairo_atomic_int_inc (cairo_atomic_intptr_t *x)
      46                 : {
      47                 :     CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
      48             300 :     *x += 1;
      49                 :     CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
      50             300 : }
      51                 : 
      52                 : cairo_bool_t
      53             476 : _cairo_atomic_int_dec_and_test (cairo_atomic_intptr_t *x)
      54                 : {
      55                 :     cairo_bool_t ret;
      56                 : 
      57                 :     CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
      58             476 :     ret = --*x == 0;
      59                 :     CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
      60                 : 
      61             476 :     return ret;
      62                 : }
      63                 : 
      64                 : cairo_atomic_intptr_t
      65               0 : _cairo_atomic_int_cmpxchg_return_old_impl (cairo_atomic_intptr_t *x, cairo_atomic_intptr_t oldv, cairo_atomic_intptr_t newv)
      66                 : {
      67                 :     cairo_atomic_intptr_t ret;
      68                 : 
      69                 :     CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
      70               0 :     ret = *x;
      71               0 :     if (ret == oldv)
      72               0 :         *x = newv;
      73                 :     CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
      74                 : 
      75               0 :     return ret;
      76                 : }
      77                 : 
      78                 : void *
      79               0 : _cairo_atomic_ptr_cmpxchg_return_old_impl (void **x, void *oldv, void *newv)
      80                 : {
      81                 :     void *ret;
      82                 : 
      83                 :     CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
      84               0 :     ret = *x;
      85               0 :     if (ret == oldv)
      86               0 :         *x = newv;
      87                 :     CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
      88                 : 
      89               0 :     return ret;
      90                 : }
      91                 : 
      92                 : #ifdef ATOMIC_OP_NEEDS_MEMORY_BARRIER
      93                 : cairo_atomic_intptr_t
      94                 : _cairo_atomic_int_get (cairo_atomic_intptr_t *x)
      95                 : {
      96                 :     cairo_atomic_intptr_t ret;
      97                 : 
      98                 :     CAIRO_MUTEX_LOCK (_cairo_atomic_mutex);
      99                 :     ret = *x;
     100                 :     CAIRO_MUTEX_UNLOCK (_cairo_atomic_mutex);
     101                 : 
     102                 :     return ret;
     103                 : }
     104                 : #endif
     105                 : 
     106                 : #endif

Generated by: LCOV version 1.7