/* * Copyright (C) 2010 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef MemoryMeasure_h #define MemoryMeasure_h namespace WebKit { /*! * A simple class that measures the difference in the resident memory of the * process between its contruction and destruction. It uses the mach API - * task_info - to figure this out. */ class MemoryMeasure { public: MemoryMeasure() : m_logString("") , m_initialMemory(taskMemory()) { } MemoryMeasure(const char *log) : m_logString(log) , m_initialMemory(taskMemory()) { } ~MemoryMeasure(); static void enableLogging(bool enabled); static bool isLoggingEnabled(); private: const char *m_logString; long m_initialMemory; static bool m_isLoggingEnabled; /*! * @return The resident memory (in bytes) consumed by the process. It uses * task_info() to get this information. If there is an error, it * returns -1. */ long taskMemory(); }; } #endif