1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000 1.2 +++ b/src/share/vm/services/memoryUsage.hpp Sat Dec 01 00:00:00 2007 +0000 1.3 @@ -0,0 +1,77 @@ 1.4 +/* 1.5 + * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved. 1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 1.7 + * 1.8 + * This code is free software; you can redistribute it and/or modify it 1.9 + * under the terms of the GNU General Public License version 2 only, as 1.10 + * published by the Free Software Foundation. 1.11 + * 1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT 1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1.15 + * version 2 for more details (a copy is included in the LICENSE file that 1.16 + * accompanied this code). 1.17 + * 1.18 + * You should have received a copy of the GNU General Public License version 1.19 + * 2 along with this work; if not, write to the Free Software Foundation, 1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1.21 + * 1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or 1.24 + * have any questions. 1.25 + * 1.26 + */ 1.27 + 1.28 +// A memory usage contains the following attributes about memory usage: 1.29 +// initSize - represents the initial amount of memory (in bytes) that 1.30 +// the Java virtual machine requests from the operating system 1.31 +// for memory management. The Java virtual machine may request 1.32 +// additional memory from the operating system later when appropriate. 1.33 +// Its value may be undefined. 1.34 +// used - represents the amount of memory currently used (in bytes). 1.35 +// committed - represents the amount of memory (in bytes) that is 1.36 +// guaranteed to be available for use by the Java virtual machine. 1.37 +// The amount of committed memory may change over time (increase 1.38 +// or decrease). It is guaranteed to be greater than or equal 1.39 +// to initSize. 1.40 +// maxSize - represents the maximum amount of memory (in bytes) 1.41 +// that can be used for memory management. The maximum amount of 1.42 +// memory for memory management could be less than the amount of 1.43 +// committed memory. Its value may be undefined. 1.44 + 1.45 +class MemoryUsage VALUE_OBJ_CLASS_SPEC { 1.46 +private: 1.47 + size_t _initSize; 1.48 + size_t _used; 1.49 + size_t _committed; 1.50 + size_t _maxSize; 1.51 + 1.52 +public: 1.53 + // Constructors 1.54 + MemoryUsage(size_t i, size_t u, size_t c, size_t m) : 1.55 + _initSize(i), _used(u), _committed(c), _maxSize(m) {}; 1.56 + MemoryUsage() : 1.57 + _initSize(0), _used(0), _committed(0), _maxSize(0) {}; 1.58 + 1.59 + size_t init_size() const { return _initSize; } 1.60 + size_t used() const { return _used; } 1.61 + size_t committed() const { return _committed; } 1.62 + size_t max_size() const { return _maxSize; } 1.63 + 1.64 + inline static jlong convert_to_jlong(size_t val) { 1.65 + // In the 64-bit vm, a size_t can overflow a jlong (which is signed). 1.66 + jlong ret; 1.67 + if (val == (size_t)-1) { 1.68 + ret = -1L; 1.69 + } else { 1.70 + NOT_LP64(ret = val;) 1.71 + LP64_ONLY(ret = MIN2(val, (size_t)max_jlong);) 1.72 + } 1.73 + return ret; 1.74 + } 1.75 + 1.76 + jlong init_size_as_jlong() const { return convert_to_jlong(_initSize); } 1.77 + jlong used_as_jlong() const { return convert_to_jlong(_used); } 1.78 + jlong committed_as_jlong() const { return convert_to_jlong(_committed); } 1.79 + jlong max_size_as_jlong() const { return convert_to_jlong(_maxSize); } 1.80 +};