/work/workdir/UnpackedTarball/cairo/src/cairo-freed-pool.c
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1 | | /* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */ |
2 | | /* cairo - a vector graphics library with display and print output |
3 | | * |
4 | | * Copyright © 2009 Chris Wilson |
5 | | * |
6 | | * This library is free software; you can redistribute it and/or |
7 | | * modify it either under the terms of the GNU Lesser General Public |
8 | | * License version 2.1 as published by the Free Software Foundation |
9 | | * (the "LGPL") or, at your option, under the terms of the Mozilla |
10 | | * Public License Version 1.1 (the "MPL"). If you do not alter this |
11 | | * notice, a recipient may use your version of this file under either |
12 | | * the MPL or the LGPL. |
13 | | * |
14 | | * You should have received a copy of the LGPL along with this library |
15 | | * in the file COPYING-LGPL-2.1; if not, write to the Free Software |
16 | | * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA |
17 | | * You should have received a copy of the MPL along with this library |
18 | | * in the file COPYING-MPL-1.1 |
19 | | * |
20 | | * The contents of this file are subject to the Mozilla Public License |
21 | | * Version 1.1 (the "License"); you may not use this file except in |
22 | | * compliance with the License. You may obtain a copy of the License at |
23 | | * http://www.mozilla.org/MPL/ |
24 | | * |
25 | | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY |
26 | | * OF ANY KIND, either express or implied. See the LGPL or the MPL for |
27 | | * the specific language governing rights and limitations. |
28 | | * |
29 | | * The Original Code is the cairo graphics library. |
30 | | * |
31 | | * The Initial Developer of the Original Code is University of Southern |
32 | | * California. |
33 | | * |
34 | | * Contributor(s): |
35 | | * Chris Wilson <chris@chris-wilson.co.uk> |
36 | | */ |
37 | | |
38 | | #include "cairoint.h" |
39 | | |
40 | | #include "cairo-freed-pool-private.h" |
41 | | |
42 | | #if HAS_FREED_POOL |
43 | | |
44 | | void * |
45 | | _freed_pool_get_search (freed_pool_t *pool) |
46 | 86 | { |
47 | 86 | void *ptr; |
48 | 86 | int i; |
49 | | |
50 | 1.46k | for (i = ARRAY_LENGTH (pool->pool); i--;) { |
51 | 1.37k | ptr = _atomic_fetch (&pool->pool[i]); |
52 | 1.37k | if (ptr != NULL) { |
53 | 0 | _cairo_atomic_int_set_relaxed (&pool->top, i); |
54 | 0 | return ptr; |
55 | 0 | } |
56 | 1.37k | } |
57 | | |
58 | | /* empty */ |
59 | 86 | _cairo_atomic_int_set_relaxed (&pool->top, 0); |
60 | 86 | return NULL; |
61 | 86 | } |
62 | | |
63 | | void |
64 | | _freed_pool_put_search (freed_pool_t *pool, void *ptr) |
65 | 0 | { |
66 | 0 | int i; |
67 | |
|
68 | 0 | for (i = 0; i < ARRAY_LENGTH (pool->pool); i++) { |
69 | 0 | if (_atomic_store (&pool->pool[i], ptr)) { |
70 | 0 | _cairo_atomic_int_set_relaxed (&pool->top, i + 1); |
71 | 0 | return; |
72 | 0 | } |
73 | 0 | } |
74 | | |
75 | | /* full */ |
76 | 0 | _cairo_atomic_int_set_relaxed (&pool->top, i); |
77 | 0 | free (ptr); |
78 | 0 | } |
79 | | |
80 | | void |
81 | | _freed_pool_reset (freed_pool_t *pool) |
82 | 0 | { |
83 | 0 | int i; |
84 | |
|
85 | 0 | for (i = 0; i < ARRAY_LENGTH (pool->pool); i++) { |
86 | 0 | free (pool->pool[i]); |
87 | 0 | pool->pool[i] = NULL; |
88 | 0 | } |
89 | |
|
90 | 0 | _cairo_atomic_int_set_relaxed (&pool->top, 0); |
91 | 0 | } |
92 | | |
93 | | #endif |