oshi.hardware.platform.windows.WindowsVirtualMemory Maven / Gradle / Ivy
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/*
* Copyright 2019-2022 The OSHI Project Contributors
* SPDX-License-Identifier: MIT
*/
package oshi.hardware.platform.windows;
import static oshi.util.Memoizer.defaultExpiration;
import static oshi.util.Memoizer.memoize;
import java.util.Map;
import java.util.function.Supplier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.sun.jna.platform.win32.Kernel32;
import com.sun.jna.platform.win32.Psapi;
import oshi.annotation.concurrent.ThreadSafe;
import oshi.driver.windows.perfmon.MemoryInformation;
import oshi.driver.windows.perfmon.MemoryInformation.PageSwapProperty;
import oshi.driver.windows.perfmon.PagingFile;
import oshi.driver.windows.perfmon.PagingFile.PagingPercentProperty;
import oshi.hardware.common.AbstractVirtualMemory;
import oshi.jna.Struct.CloseablePerformanceInformation;
import oshi.util.tuples.Pair;
import oshi.util.tuples.Triplet;
/**
* Memory obtained from WMI
*/
@ThreadSafe
final class WindowsVirtualMemory extends AbstractVirtualMemory {
private static final Logger LOG = LoggerFactory.getLogger(WindowsVirtualMemory.class);
private final WindowsGlobalMemory global;
private final Supplier used = memoize(WindowsVirtualMemory::querySwapUsed, defaultExpiration());
private final Supplier> totalVmaxVused = memoize(
WindowsVirtualMemory::querySwapTotalVirtMaxVirtUsed, defaultExpiration());
private final Supplier> swapInOut = memoize(WindowsVirtualMemory::queryPageSwaps,
defaultExpiration());
/**
* Constructor for WindowsVirtualMemory.
*
* @param windowsGlobalMemory The parent global memory class instantiating this
*/
WindowsVirtualMemory(WindowsGlobalMemory windowsGlobalMemory) {
this.global = windowsGlobalMemory;
}
@Override
public long getSwapUsed() {
return this.global.getPageSize() * used.get();
}
@Override
public long getSwapTotal() {
return this.global.getPageSize() * totalVmaxVused.get().getA();
}
@Override
public long getVirtualMax() {
return this.global.getPageSize() * totalVmaxVused.get().getB();
}
@Override
public long getVirtualInUse() {
return this.global.getPageSize() * totalVmaxVused.get().getC();
}
@Override
public long getSwapPagesIn() {
return swapInOut.get().getA();
}
@Override
public long getSwapPagesOut() {
return swapInOut.get().getB();
}
private static long querySwapUsed() {
return PagingFile.querySwapUsed().getOrDefault(PagingPercentProperty.PERCENTUSAGE, 0L);
}
private static Triplet querySwapTotalVirtMaxVirtUsed() {
try (CloseablePerformanceInformation perfInfo = new CloseablePerformanceInformation()) {
if (!Psapi.INSTANCE.GetPerformanceInfo(perfInfo, perfInfo.size())) {
LOG.error("Failed to get Performance Info. Error code: {}", Kernel32.INSTANCE.GetLastError());
return new Triplet<>(0L, 0L, 0L);
}
return new Triplet<>(perfInfo.CommitLimit.longValue() - perfInfo.PhysicalTotal.longValue(),
perfInfo.CommitLimit.longValue(), perfInfo.CommitTotal.longValue());
}
}
private static Pair queryPageSwaps() {
Map valueMap = MemoryInformation.queryPageSwaps();
return new Pair<>(valueMap.getOrDefault(PageSwapProperty.PAGESINPUTPERSEC, 0L),
valueMap.getOrDefault(PageSwapProperty.PAGESOUTPUTPERSEC, 0L));
}
}