1 /* 2 * Copyright (C) 2012 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 MemoryUsageSupport_h 32 #define MemoryUsageSupport_h 33 34 #include "wtf/Forward.h" 35 #include "wtf/PassOwnPtr.h" 36 #include "wtf/text/WTFString.h" 37 38 namespace WebCore { 39 40 class MemoryUsageSupport { 41 public: 42 // Returns the current space allocated for the pagefile, in MB. 43 // That is committed size for Windows and virtual memory size for POSIX. 44 static int memoryUsageMB(); 45 46 // Same as above, but always returns actual value, without any 47 // caches. 48 static int actualMemoryUsageMB(); 49 50 // Returns private and shared usage, in bytes. Private bytes is the amount of 51 // memory currently allocated to this process that cannot be shared. Returns 52 // false on platform specific error conditions. 53 static bool processMemorySizesInBytes(size_t* privateBytes, size_t* sharedBytes); 54 55 // A callback for requestProcessMemorySizes 56 class ProcessMemorySizesCallback { 57 public: 58 virtual ~ProcessMemorySizesCallback() { } 59 virtual void dataReceived(size_t privateBytes, size_t sharedBytes) = 0; 60 }; 61 62 // Requests private and shared usage, in bytes. Private bytes is the amount of 63 // memory currently allocated to this process that cannot be shared. 64 static void requestProcessMemorySizes(PassOwnPtr<ProcessMemorySizesCallback> requestCallback); 65 }; 66 67 } // namespace WebCore 68 69 #endif // MemoryUsageSupport_h 70
