1 /* 2 * Copyright (C) 2013 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 WebImageCache_h 32 #define WebImageCache_h 33 34 #include "../platform/WebCommon.h" 35 36 namespace blink { 37 38 // An interface to query and configure WebKit's image cache. 39 // 40 // Methods of this interface can be called on any thread. 41 // 42 // Methods of this interface can be only be used after blink::initialize() 43 // and before blink::shutdown() is called. 44 45 class WebImageCache { 46 public: 47 // Sets the capacities of the image cache, evicting objects as necessary. 48 BLINK_EXPORT static void setCacheLimitInBytes(size_t); 49 50 // Clears the cache (as much as possible; some resources may not be 51 // cleared if they are actively referenced). 52 BLINK_EXPORT static void clear(); 53 54 // Returns the number of bytes used by the cache. 55 BLINK_EXPORT static size_t memoryUsageInBytes(); 56 57 // Returns the number of cached entries. 58 BLINK_EXPORT static unsigned cacheEntries(); 59 60 private: 61 WebImageCache(); // Not intended to be instanced. 62 }; 63 64 } // namespace blink 65 66 #endif 67