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annotate src/share/vm/utilities/histogram.hpp @ 2426:1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair
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date | Tue, 05 Apr 2011 14:12:31 -0700 |
parents | f95d63e2154a |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_UTILITIES_HISTOGRAM_HPP |
26 #define SHARE_VM_UTILITIES_HISTOGRAM_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 #include "runtime/os.hpp" | |
30 #include "utilities/growableArray.hpp" | |
31 #ifdef TARGET_OS_FAMILY_linux | |
32 # include "os_linux.inline.hpp" | |
33 #endif | |
34 #ifdef TARGET_OS_FAMILY_solaris | |
35 # include "os_solaris.inline.hpp" | |
36 #endif | |
37 #ifdef TARGET_OS_FAMILY_windows | |
38 # include "os_windows.inline.hpp" | |
39 #endif | |
40 | |
0 | 41 // This class provides a framework for collecting various statistics. |
42 // The current implementation is oriented towards counting invocations | |
43 // of various types, but that can be easily changed. | |
44 // | |
45 // To use it, you need to declare a Histogram*, and a subtype of | |
46 // HistogramElement: | |
47 // | |
48 // HistogramElement* MyHistogram; | |
49 // | |
50 // class MyHistogramElement : public HistogramElement { | |
51 // public: | |
52 // MyHistogramElement(char* name); | |
53 // }; | |
54 // | |
55 // MyHistogramElement::MyHistogramElement(char* elementName) { | |
56 // _name = elementName; | |
57 // | |
58 // if(MyHistogram == NULL) | |
59 // MyHistogram = new Histogram("My Call Counts",100); | |
60 // | |
61 // MyHistogram->add_element(this); | |
62 // } | |
63 // | |
64 // #define MyCountWrapper(arg) static MyHistogramElement* e = new MyHistogramElement(arg); e->increment_count() | |
65 // | |
66 // This gives you a simple way to count invocations of specfic functions: | |
67 // | |
68 // void a_function_that_is_being_counted() { | |
69 // MyCountWrapper("FunctionName"); | |
70 // ... | |
71 // } | |
72 // | |
73 // To print the results, invoke print() on your Histogram*. | |
74 | |
75 #ifdef ASSERT | |
76 | |
77 class HistogramElement : public CHeapObj { | |
78 protected: | |
79 jint _count; | |
80 const char* _name; | |
81 | |
82 public: | |
83 HistogramElement(); | |
84 virtual int count(); | |
85 virtual const char* name(); | |
86 virtual void increment_count(); | |
87 void print_on(outputStream* st) const; | |
88 virtual int compare(HistogramElement* e1,HistogramElement* e2); | |
89 }; | |
90 | |
91 class Histogram : public CHeapObj { | |
92 protected: | |
93 GrowableArray<HistogramElement*>* _elements; | |
94 GrowableArray<HistogramElement*>* elements() { return _elements; } | |
95 const char* _title; | |
96 const char* title() { return _title; } | |
97 static int sort_helper(HistogramElement** e1,HistogramElement** e2); | |
98 virtual void print_header(outputStream* st); | |
99 virtual void print_elements(outputStream* st); | |
100 | |
101 public: | |
102 Histogram(const char* title,int estimatedSize); | |
103 virtual void add_element(HistogramElement* element); | |
104 void print_on(outputStream* st) const; | |
105 }; | |
106 | |
107 #endif | |
1972 | 108 |
109 #endif // SHARE_VM_UTILITIES_HISTOGRAM_HPP |