Home | History | Annotate | Download | only in src 
      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.
     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 
     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 
     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 
     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 
     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