1 /*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "WebCache.h"
33
34 // Instead of providing accessors, we make all members of Cache public.
35 // This will make it easier to track WebCore changes to the Cache class.
36 // FIXME: We should introduce public getters on the Cache class.
37 #define private public
38 #include "Cache.h"
39 #undef private
40
41 using namespace WebCore;
42
43 namespace WebKit {
44
45 // A helper method for coverting a Cache::TypeStatistic to a
46 // WebCache::ResourceTypeStat.
ToResourceTypeStat(const Cache::TypeStatistic & from,WebCache::ResourceTypeStat & to)47 static void ToResourceTypeStat(const Cache::TypeStatistic& from,
48 WebCache::ResourceTypeStat& to)
49 {
50 to.count = static_cast<size_t>(from.count);
51 to.size = static_cast<size_t>(from.size);
52 to.liveSize = static_cast<size_t>(from.liveSize);
53 to.decodedSize = static_cast<size_t>(from.decodedSize);
54 }
55
setCapacities(size_t minDeadCapacity,size_t maxDeadCapacity,size_t capacity)56 void WebCache::setCapacities(
57 size_t minDeadCapacity, size_t maxDeadCapacity, size_t capacity)
58 {
59 Cache* cache = WebCore::cache();
60 if (cache)
61 cache->setCapacities(static_cast<unsigned int>(minDeadCapacity),
62 static_cast<unsigned int>(maxDeadCapacity),
63 static_cast<unsigned int>(capacity));
64 }
65
clear()66 void WebCache::clear()
67 {
68 Cache* cache = WebCore::cache();
69 if (cache && !cache->disabled()) {
70 // NOTE: I think using setDisabled() instead of setCapacities() will
71 // remove from the cache items that won't actually be freed from memory
72 // (due to other live references to them), so it just results in wasting
73 // time later and not saving memory compared to the below technique.
74 unsigned minDeadCapacity = cache->m_minDeadCapacity;
75 unsigned maxDeadCapacity = cache->m_maxDeadCapacity;
76 unsigned capacity = cache->m_capacity;
77 cache->setCapacities(0, 0, 0); // Will prune the cache.
78 cache->setCapacities(minDeadCapacity, maxDeadCapacity, capacity);
79 }
80 }
81
getUsageStats(UsageStats * result)82 void WebCache::getUsageStats(UsageStats* result)
83 {
84 ASSERT(result);
85
86 Cache* cache = WebCore::cache();
87 if (cache) {
88 result->minDeadCapacity = cache->m_minDeadCapacity;
89 result->maxDeadCapacity = cache->m_maxDeadCapacity;
90 result->capacity = cache->m_capacity;
91 result->liveSize = cache->m_liveSize;
92 result->deadSize = cache->m_deadSize;
93 } else
94 memset(result, 0, sizeof(UsageStats));
95 }
96
getResourceTypeStats(ResourceTypeStats * result)97 void WebCache::getResourceTypeStats(ResourceTypeStats* result)
98 {
99 Cache* cache = WebCore::cache();
100 if (cache) {
101 Cache::Statistics stats = cache->getStatistics();
102 ToResourceTypeStat(stats.images, result->images);
103 ToResourceTypeStat(stats.cssStyleSheets, result->cssStyleSheets);
104 ToResourceTypeStat(stats.scripts, result->scripts);
105 #if ENABLE(XSLT)
106 ToResourceTypeStat(stats.xslStyleSheets, result->xslStyleSheets);
107 #else
108 memset(&result->xslStyleSheets, 0, sizeof(result->xslStyleSheets));
109 #endif
110 ToResourceTypeStat(stats.fonts, result->fonts);
111 } else
112 memset(result, 0, sizeof(WebCache::ResourceTypeStats));
113 }
114
115 } // namespace WebKit
116