1879N/A * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 0N/A * published by the Free Software Foundation. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1472N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 0N/A// This class provides a framework for collecting various statistics. 0N/A// The current implementation is oriented towards counting invocations 0N/A// of various types, but that can be easily changed. 0N/A// To use it, you need to declare a Histogram*, and a subtype of 0N/A// HistogramElement* MyHistogram; 0N/A// class MyHistogramElement : public HistogramElement { 0N/A// MyHistogramElement(char* name); 0N/A// MyHistogramElement::MyHistogramElement(char* elementName) { 0N/A// _name = elementName; 0N/A// if(MyHistogram == NULL) 0N/A// MyHistogram = new Histogram("My Call Counts",100); 0N/A// MyHistogram->add_element(this); 0N/A// #define MyCountWrapper(arg) static MyHistogramElement* e = new MyHistogramElement(arg); e->increment_count() 0N/A// This gives you a simple way to count invocations of specfic functions: 0N/A// void a_function_that_is_being_counted() { 0N/A// MyCountWrapper("FunctionName"); 0N/A// To print the results, invoke print() on your Histogram*. 1879N/A#
endif // SHARE_VM_UTILITIES_HISTOGRAM_HPP