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1 /*
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2 * Copyright 2007 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 # include "incls/_precompiled.incl"
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26 # include "incls/_jniPeriodicChecker.cpp.incl"
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27
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28
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29 // --------------------------------------------------------
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30 // Class to aid in periodic checking under CheckJNICalls
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31 class JniPeriodicCheckerTask : public PeriodicTask {
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32 public:
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33 JniPeriodicCheckerTask(int interval_time) : PeriodicTask(interval_time) {}
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34 void task() { os::run_periodic_checks(); }
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35 static void engage();
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36 static void disengage();
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37 };
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38
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39
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40 //----------------------------------------------------------
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41 // Implementation of JniPeriodicChecker
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42
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43 JniPeriodicCheckerTask* JniPeriodicChecker::_task = NULL;
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44
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45 /*
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46 * The engage() method is called at initialization time via
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47 * Thread::create_vm() to initialize the JniPeriodicChecker and
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48 * register it with the WatcherThread as a periodic task.
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49 */
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50 void JniPeriodicChecker::engage() {
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51 if (CheckJNICalls && !is_active()) {
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52 // start up the periodic task
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53 _task = new JniPeriodicCheckerTask(10);
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54 _task->enroll();
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55 }
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56 }
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57
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58
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59 /*
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60 * the disengage() method is responsible for deactivating the periodic
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61 * task. This method is called from before_exit() in java.cpp and is only called
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62 * after the WatcherThread has been stopped.
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63 */
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64 void JniPeriodicChecker::disengage() {
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65 if (CheckJNICalls && is_active()) {
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66 // remove JniPeriodicChecker
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67 _task->disenroll();
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68 delete _task;
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69 _task = NULL;
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70 }
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71 }
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72
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73 void jniPeriodicChecker_exit() {
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74 if (!CheckJNICalls) return;
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75 }
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