/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
#include "precompiled.hpp"
#include "memory/allocation.inline.hpp"
#include "runtime/jniPeriodicChecker.hpp"
#include "runtime/task.hpp"
// --------------------------------------------------------
// Class to aid in periodic checking under CheckJNICalls
class JniPeriodicCheckerTask : public PeriodicTask {
public:
JniPeriodicCheckerTask(int interval_time) : PeriodicTask(interval_time) {}
void task() { os::run_periodic_checks(); }
static void engage();
static void disengage();
};
//----------------------------------------------------------
// Implementation of JniPeriodicChecker
JniPeriodicCheckerTask* JniPeriodicChecker::_task = NULL;
/*
* The engage() method is called at initialization time via
* Thread::create_vm() to initialize the JniPeriodicChecker and
* register it with the WatcherThread as a periodic task.
*/
void JniPeriodicChecker::engage() {
if (CheckJNICalls && !is_active()) {
// start up the periodic task
_task = new JniPeriodicCheckerTask(10);
_task->enroll();
}
}
/*
* the disengage() method is responsible for deactivating the periodic
* task. This method is called from before_exit() in java.cpp and is only called
* after the WatcherThread has been stopped.
*/
void JniPeriodicChecker::disengage() {
if (CheckJNICalls && is_active()) {
// remove JniPeriodicChecker
_task->disenroll();
delete _task;
_task = NULL;
}
}
void jniPeriodicChecker_exit() {
if (!CheckJNICalls) return;
}