Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/services/memoryUsage.hpp
src/share/vm/services/memoryUsage.hpp
- changeset 435
- a61af66fc99e
- child 1907
- c18cbe5936b8
equal
deleted
inserted
replaced
| -1:000000000000 | 435:a61af66fc99e |
|---|---|
| 1 /* | |
| 2 * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 // A memory usage contains the following attributes about memory usage: | |
| 26 // initSize - represents the initial amount of memory (in bytes) that | |
| 27 // the Java virtual machine requests from the operating system | |
| 28 // for memory management. The Java virtual machine may request | |
| 29 // additional memory from the operating system later when appropriate. | |
| 30 // Its value may be undefined. | |
| 31 // used - represents the amount of memory currently used (in bytes). | |
| 32 // committed - represents the amount of memory (in bytes) that is | |
| 33 // guaranteed to be available for use by the Java virtual machine. | |
| 34 // The amount of committed memory may change over time (increase | |
| 35 // or decrease). It is guaranteed to be greater than or equal | |
| 36 // to initSize. | |
| 37 // maxSize - represents the maximum amount of memory (in bytes) | |
| 38 // that can be used for memory management. The maximum amount of | |
| 39 // memory for memory management could be less than the amount of | |
| 40 // committed memory. Its value may be undefined. | |
| 41 | |
| 42 class MemoryUsage VALUE_OBJ_CLASS_SPEC { | |
| 43 private: | |
| 44 size_t _initSize; | |
| 45 size_t _used; | |
| 46 size_t _committed; | |
| 47 size_t _maxSize; | |
| 48 | |
| 49 public: | |
| 50 // Constructors | |
| 51 MemoryUsage(size_t i, size_t u, size_t c, size_t m) : | |
| 52 _initSize(i), _used(u), _committed(c), _maxSize(m) {}; | |
| 53 MemoryUsage() : | |
| 54 _initSize(0), _used(0), _committed(0), _maxSize(0) {}; | |
| 55 | |
| 56 size_t init_size() const { return _initSize; } | |
| 57 size_t used() const { return _used; } | |
| 58 size_t committed() const { return _committed; } | |
| 59 size_t max_size() const { return _maxSize; } | |
| 60 | |
| 61 inline static jlong convert_to_jlong(size_t val) { | |
| 62 // In the 64-bit vm, a size_t can overflow a jlong (which is signed). | |
| 63 jlong ret; | |
| 64 if (val == (size_t)-1) { | |
| 65 ret = -1L; | |
| 66 } else { | |
| 67 NOT_LP64(ret = val;) | |
| 68 LP64_ONLY(ret = MIN2(val, (size_t)max_jlong);) | |
| 69 } | |
| 70 return ret; | |
| 71 } | |
| 72 | |
| 73 jlong init_size_as_jlong() const { return convert_to_jlong(_initSize); } | |
| 74 jlong used_as_jlong() const { return convert_to_jlong(_used); } | |
| 75 jlong committed_as_jlong() const { return convert_to_jlong(_committed); } | |
| 76 jlong max_size_as_jlong() const { return convert_to_jlong(_maxSize); } | |
| 77 }; |
