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      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 MemoryCache public.
     35 // This will make it easier to track WebCore changes to the MemoryCache class.
     36 // FIXME: We should introduce public getters on the MemoryCache class.
     37 #define private public
     38 #include "MemoryCache.h"
     39 #undef private
     40 
     41 using namespace WebCore;
     42 
     43 namespace WebKit {
     44 
     45 // A helper method for coverting a MemoryCache::TypeStatistic to a
     46 // WebCache::ResourceTypeStat.
     47 static void ToResourceTypeStat(const MemoryCache::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     MemoryCache* cache = WebCore::memoryCache();
     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     MemoryCache* cache = WebCore::memoryCache();
     69     if (cache && !cache->disabled()) {
     70         cache->setDisabled(true);
     71         cache->setDisabled(false);
     72     }
     73 }
     74 
     75 void WebCache::getUsageStats(UsageStats* result)
     76 {
     77     ASSERT(result);
     78 
     79     MemoryCache* cache = WebCore::memoryCache();
     80     if (cache) {
     81         result->minDeadCapacity = cache->m_minDeadCapacity;
     82         result->maxDeadCapacity = cache->m_maxDeadCapacity;
     83         result->capacity = cache->m_capacity;
     84         result->liveSize = cache->m_liveSize;
     85         result->deadSize = cache->m_deadSize;
     86     } else
     87         memset(result, 0, sizeof(UsageStats));
     88 }
     89 
     90 void WebCache::getResourceTypeStats(ResourceTypeStats* result)
     91 {
     92     MemoryCache* cache = WebCore::memoryCache();
     93     if (cache) {
     94         MemoryCache::Statistics stats = cache->getStatistics();
     95         ToResourceTypeStat(stats.images, result->images);
     96         ToResourceTypeStat(stats.cssStyleSheets, result->cssStyleSheets);
     97         ToResourceTypeStat(stats.scripts, result->scripts);
     98 #if ENABLE(XSLT)
     99         ToResourceTypeStat(stats.xslStyleSheets, result->xslStyleSheets);
    100 #else
    101         memset(&result->xslStyleSheets, 0, sizeof(result->xslStyleSheets));
    102 #endif
    103         ToResourceTypeStat(stats.fonts, result->fonts);
    104     } else
    105         memset(result, 0, sizeof(WebCache::ResourceTypeStats));
    106 }
    107 
    108 }  // namespace WebKit
    109