oshi.driver.unix.aix.perfstat.PerfstatProtocol Maven / Gradle / Ivy
/*
* Copyright 2020-2022 The OSHI Project Contributors
* SPDX-License-Identifier: MIT
*/
package oshi.driver.unix.aix.perfstat;
import com.sun.jna.platform.unix.aix.Perfstat;
import com.sun.jna.platform.unix.aix.Perfstat.perfstat_id_t;
import com.sun.jna.platform.unix.aix.Perfstat.perfstat_protocol_t;
import oshi.annotation.concurrent.ThreadSafe;
/**
* Utility to query performance stats for network interfaces
*/
@ThreadSafe
public final class PerfstatProtocol {
private static final Perfstat PERF = Perfstat.INSTANCE;
private PerfstatProtocol() {
}
/**
* Queries perfstat_protocol for per-protocol usage statistics
*
* @return an array of usage statistics
*/
public static perfstat_protocol_t[] queryProtocols() {
perfstat_protocol_t protocol = new perfstat_protocol_t();
// With null, null, ..., 0, returns total # of elements
int total = PERF.perfstat_protocol(null, null, protocol.size(), 0);
if (total > 0) {
perfstat_protocol_t[] statp = (perfstat_protocol_t[]) protocol.toArray(total);
perfstat_id_t firstprotocol = new perfstat_id_t(); // name is ""
int ret = PERF.perfstat_protocol(firstprotocol, statp, protocol.size(), total);
if (ret > 0) {
return statp;
}
}
return new perfstat_protocol_t[0];
}
}