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comparison src/share/vm/runtime/jniPeriodicChecker.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2007 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 # include "incls/_precompiled.incl"
26 # include "incls/_jniPeriodicChecker.cpp.incl"
27
28
29 // --------------------------------------------------------
30 // Class to aid in periodic checking under CheckJNICalls
31 class JniPeriodicCheckerTask : public PeriodicTask {
32 public:
33 JniPeriodicCheckerTask(int interval_time) : PeriodicTask(interval_time) {}
34 void task() { os::run_periodic_checks(); }
35 static void engage();
36 static void disengage();
37 };
38
39
40 //----------------------------------------------------------
41 // Implementation of JniPeriodicChecker
42
43 JniPeriodicCheckerTask* JniPeriodicChecker::_task = NULL;
44
45 /*
46 * The engage() method is called at initialization time via
47 * Thread::create_vm() to initialize the JniPeriodicChecker and
48 * register it with the WatcherThread as a periodic task.
49 */
50 void JniPeriodicChecker::engage() {
51 if (CheckJNICalls && !is_active()) {
52 // start up the periodic task
53 _task = new JniPeriodicCheckerTask(10);
54 _task->enroll();
55 }
56 }
57
58
59 /*
60 * the disengage() method is responsible for deactivating the periodic
61 * task. This method is called from before_exit() in java.cpp and is only called
62 * after the WatcherThread has been stopped.
63 */
64 void JniPeriodicChecker::disengage() {
65 if (CheckJNICalls && is_active()) {
66 // remove JniPeriodicChecker
67 _task->disenroll();
68 delete _task;
69 _task = NULL;
70 }
71 }
72
73 void jniPeriodicChecker_exit() {
74 if (!CheckJNICalls) return;
75 }