oshi.driver.unix.solaris.kstat.SystemPages Maven / Gradle / Ivy
/**
* MIT License
*
* Copyright (c) 2010 - 2020 The OSHI Project Contributors: https://github.com/oshi/oshi/graphs/contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package oshi.driver.unix.solaris.kstat;
import com.sun.jna.platform.unix.solaris.LibKstat.Kstat; // NOSONAR squid:s1191
import oshi.annotation.concurrent.ThreadSafe;
import oshi.util.platform.unix.solaris.KstatUtil;
import oshi.util.platform.unix.solaris.KstatUtil.KstatChain;
import oshi.util.tuples.Pair;
/**
* Utility to query geom part list
*/
@ThreadSafe
public final class SystemPages {
private SystemPages() {
}
/**
* Queries the {@code system_pages} kstat and returns available and physical
* memory
*
* @return A pair with the available and total memory, in pages. Mutiply by page
* size for bytes.
*/
public static Pair queryAvailableTotal() {
long memAvailable = 0;
long memTotal = 0;
// Get first result
try (KstatChain kc = KstatUtil.openChain()) {
Kstat ksp = kc.lookup(null, -1, "system_pages");
// Set values
if (ksp != null && kc.read(ksp)) {
memAvailable = KstatUtil.dataLookupLong(ksp, "availrmem"); // not a typo
memTotal = KstatUtil.dataLookupLong(ksp, "physmem");
}
}
return new Pair<>(memAvailable, memTotal);
}
}