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1 /*
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2 * Copyright 2002-2004 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // CollectorCounters is a holder class for performance counters
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26 // that track a collector
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27
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28 class CollectorCounters: public CHeapObj {
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29 friend class VMStructs;
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30
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31 private:
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32 PerfCounter* _invocations;
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33 PerfCounter* _time;
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34 PerfVariable* _last_entry_time;
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35 PerfVariable* _last_exit_time;
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36
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37 // Constant PerfData types don't need to retain a reference.
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38 // However, it's a good idea to document them here.
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39 // PerfStringConstant* _name;
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40
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41 char* _name_space;
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42
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43 public:
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44
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45 CollectorCounters(const char* name, int ordinal);
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46
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47 ~CollectorCounters() {
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48 if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
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49 }
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50
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51 inline PerfCounter* invocation_counter() const { return _invocations; }
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52
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53 inline PerfCounter* time_counter() const { return _time; }
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54
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55 inline PerfVariable* last_entry_counter() const { return _last_entry_time; }
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56
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57 inline PerfVariable* last_exit_counter() const { return _last_exit_time; }
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58
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59 const char* name_space() const { return _name_space; }
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60 };
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61
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62 class TraceCollectorStats: public PerfTraceTimedEvent {
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63
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64 protected:
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65 CollectorCounters* _c;
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66
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67 public:
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68 inline TraceCollectorStats(CollectorCounters* c) :
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69 PerfTraceTimedEvent(c->time_counter(), c->invocation_counter()),
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70 _c(c) {
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71
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72 if (UsePerfData) {
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73 _c->last_entry_counter()->set_value(os::elapsed_counter());
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74 }
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75 }
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76
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77 inline ~TraceCollectorStats() {
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78 if (UsePerfData) _c->last_exit_counter()->set_value(os::elapsed_counter());
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79 }
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80 };
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