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 #ifndef WebCache_h 32 #define WebCache_h 33 34 #include "WebCommon.h" 35 36 namespace WebKit { 37 38 // An interface to query and configure WebKit's resource cache. 39 class WebCache { 40 public: 41 struct UsageStats { 42 // Capacities. 43 size_t minDeadCapacity; 44 size_t maxDeadCapacity; 45 size_t capacity; 46 // Utilization. 47 size_t liveSize; 48 size_t deadSize; 49 }; 50 51 // A struct mirroring WebCore::MemoryCache::TypeStatistic. 52 struct ResourceTypeStat { 53 size_t count; 54 size_t size; 55 size_t liveSize; 56 size_t decodedSize; 57 }; 58 59 // A struct mirroring WebCore::MemoryCache::Statistics. 60 struct ResourceTypeStats { 61 ResourceTypeStat images; 62 ResourceTypeStat cssStyleSheets; 63 ResourceTypeStat scripts; 64 ResourceTypeStat xslStyleSheets; 65 ResourceTypeStat fonts; 66 }; 67 68 // Sets the capacities of the resource cache, evicting objects as necessary. 69 WEBKIT_API static void setCapacities(size_t minDeadCapacity, 70 size_t maxDeadCapacity, 71 size_t capacity); 72 73 // Clears the cache (as much as possible; some resources may not be 74 // cleared if they are actively referenced). 75 WEBKIT_API static void clear(); 76 77 // Gets the usage statistics from the resource cache. 78 WEBKIT_API static void getUsageStats(UsageStats*); 79 80 // Get usage stats about the resource cache. 81 WEBKIT_API static void getResourceTypeStats(ResourceTypeStats*); 82 83 private: 84 WebCache(); // Not intended to be instanced. 85 }; 86 87 } // namespace WebKit 88 89 #endif 90