mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-01 11:52:47 +00:00
196 lines
7.2 KiB
Java
196 lines
7.2 KiB
Java
/* MemoryPoolMXBeanImpl.java - VM interface for memory pool beans
|
|
Copyright (C) 2006 Free Software Foundation
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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 for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
package gnu.java.lang.management;
|
|
|
|
import java.lang.management.MemoryUsage;
|
|
|
|
/**
|
|
* Provides access to information on the memory resources or
|
|
* pools used by the current invocation of the virtual machine.
|
|
*
|
|
* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
|
|
* @since 1.5
|
|
*/
|
|
final class VMMemoryPoolMXBeanImpl
|
|
{
|
|
|
|
/**
|
|
* Returns memory usage statistics for the specified pool
|
|
* just after a best-effort attempt to free memory. This
|
|
* is valid only for certain garbage collectors.
|
|
*
|
|
* @param name the name of the pool to obtain statistics on.
|
|
* @return a {@link java.lang.management.MemoryUsage} object
|
|
* containing the statistics or <code>null</code>
|
|
* if this pool does not support such statistics.
|
|
*/
|
|
static native MemoryUsage getCollectionUsage(String name);
|
|
|
|
/**
|
|
* Returns the collection usage threshold for the specified pool.
|
|
* This is only called if this functionality is supported
|
|
* by the virtual machine (i.e. the appropriate property,
|
|
* <code>gnu.java.lang.management.CollectionUsageThresholdSupport</code>,
|
|
* is defined). The value is initially zero.
|
|
*
|
|
* @param name the name of the pool to obtain statistics on.
|
|
* @return the collection usage threshold.
|
|
*/
|
|
static native long getCollectionUsageThreshold(String name);
|
|
|
|
/**
|
|
* Returns the number of times the collection usage threshold
|
|
* has been met or exceeded by the specified pool.
|
|
* This is only called if this functionality is supported
|
|
* by the virtual machine (i.e. the appropriate property,
|
|
* <code>gnu.java.lang.management.CollectionUsageThresholdSupport</code>,
|
|
* is defined).
|
|
*
|
|
* @param name the name of the pool to obtain statistics on.
|
|
* @return the collection usage threshold count.
|
|
*/
|
|
static native long getCollectionUsageThresholdCount(String name);
|
|
|
|
/**
|
|
* Returns an array of names of memory managers which manage
|
|
* the specified pool.
|
|
*
|
|
* @param name the name of the pool to obtain statistics on.
|
|
* @return a list of memory managers for the pool.
|
|
*/
|
|
static native String[] getMemoryManagerNames(String name);
|
|
|
|
/**
|
|
* Returns the peak usage level of the specified pool.
|
|
* This is only called if the pool is valid.
|
|
*
|
|
* @param name the name of the pool to obtain statistics on.
|
|
* @return a {@link java.lang.management.MemoryUsage} object
|
|
* containing the statistics.
|
|
*/
|
|
static native MemoryUsage getPeakUsage(String name);
|
|
|
|
/**
|
|
* Returns the type of memory used by the specified pool.
|
|
* The value must be either "HEAP" or "NON_HEAP".
|
|
*
|
|
* @param name the name of the pool to obtain statistics on.
|
|
* @return the type of the given pool.
|
|
*/
|
|
static native String getType(String name);
|
|
|
|
/**
|
|
* Returns the current usage level of the specified pool.
|
|
* This is only called if the pool is valid.
|
|
*
|
|
* @param name the name of the pool to obtain statistics on.
|
|
* @return a {@link java.lang.management.MemoryUsage} object
|
|
* containing the statistics.
|
|
*/
|
|
static native MemoryUsage getUsage(String name);
|
|
|
|
/**
|
|
* Returns the usage threshold for the specified pool.
|
|
* This is only called if this functionality is supported
|
|
* by the virtual machine (i.e. the appropriate property,
|
|
* <code>gnu.java.lang.management.UsageThresholdSupport</code>,
|
|
* is defined). The value is initially defined by the
|
|
* virtual machine.
|
|
*
|
|
* @param name the name of the pool to obtain statistics on.
|
|
* @return the usage threshold.
|
|
*/
|
|
static native long getUsageThreshold(String name);
|
|
|
|
/**
|
|
* Returns the number of times the usage threshold
|
|
* has been met or exceeded by the specified pool.
|
|
* This is only called if this functionality is supported
|
|
* by the virtual machine (i.e. the appropriate property,
|
|
* <code>gnu.java.lang.management.UsageThresholdSupport</code>,
|
|
* is defined).
|
|
*
|
|
* @param name the name of the pool to obtain statistics on.
|
|
* @return the usage threshold count.
|
|
*/
|
|
static native long getUsageThresholdCount(String name);
|
|
|
|
/**
|
|
* Returns true if the specified pool is still valid i.e.
|
|
* it is still in use by the virtual machine.
|
|
*
|
|
* @param name the name of the pool to check the validity of.
|
|
* @return true if the pool is valid.
|
|
*/
|
|
static native boolean isValid(String name);
|
|
|
|
/**
|
|
* Resets the peak usage level to the current usage level for
|
|
* the specified pool.
|
|
*
|
|
* @param name the name of the pool to reset the peak usage of.
|
|
*/
|
|
static native void resetPeakUsage(String name);
|
|
|
|
/**
|
|
* Sets the collection usage threshold for the specified
|
|
* pool to the supplied value.
|
|
* This is only called if this functionality is supported
|
|
* by the virtual machine (i.e. the appropriate property,
|
|
* <code>gnu.java.lang.management.CollectionUsageThresholdSupport</code>,
|
|
* is defined).
|
|
*
|
|
* @param name the name of the pool to set the threshold of.
|
|
* @param threshold the new threshold level.
|
|
*/
|
|
static native void setCollectionUsageThreshold(String name, long threshold);
|
|
|
|
/**
|
|
* Sets the usage threshold for the specified pool to the supplied value.
|
|
* This is only called if this functionality is supported
|
|
* by the virtual machine (i.e. the appropriate property,
|
|
* <code>gnu.java.lang.management.UsageThresholdSupport</code>,
|
|
* is defined).
|
|
*
|
|
* @param name the name of the pool to set the threshold of.
|
|
* @param threshold the new threshold level.
|
|
*/
|
|
static native void setUsageThreshold(String name, long threshold);
|
|
|
|
}
|