jdk8-mips64-public/hotspot: src/share/vm/runtime/jniPeriodicChecker.cpp@9f4457a14b58

     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  */

    25 # include "incls/_precompiled.incl"

    26 # include "incls/_jniPeriodicChecker.cpp.incl"

    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 };

    40 //----------------------------------------------------------

    41 // Implementation of JniPeriodicChecker

    43 JniPeriodicCheckerTask*              JniPeriodicChecker::_task   = NULL;

    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 }

    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 }

    73 void jniPeriodicChecker_exit() {

    74   if (!CheckJNICalls) return;

    75 }

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