Class LinuxOperatingSystemJNA

java.lang.Object

oshi.software.common.AbstractOperatingSystem

oshi.software.os.linux.LinuxOperatingSystem

oshi.software.os.linux.LinuxOperatingSystemJNA

All Implemented Interfaces:

OperatingSystem

@ThreadSafe
public class LinuxOperatingSystemJNA
extends LinuxOperatingSystem

JNA-based Linux operating system implementation. Extends LinuxOperatingSystem, providing JNA implementations of process/thread ID queries and thread count via sysinfo.

Nested Class Summary

Nested classes/interfaces inherited from interface OperatingSystem

OperatingSystem.OSVersionInfo, OperatingSystem.ProcessFiltering, OperatingSystem.ProcessSorting

Field Summary

Fields

Modifier and Type	Field	Description
static final boolean	HAS_GETTID	This static field identifies if the gettid function is in the c library.
static final boolean	HAS_SYSCALL_GETTID	This static field identifies if the syscall for gettid returns sane results.
static final boolean	HAS_UDEV	This static field identifies if the udev library can be loaded.

Fields inherited from class AbstractOperatingSystem

USE_WHO_COMMAND

Constructor Summary

Constructors

Constructor	Description
LinuxOperatingSystemJNA()

Method Summary

Modifier and Type	Method	Description
protected OSProcess	createOSProcess(int pid)	Creates a new OSProcess instance for the given PID using the appropriate native implementation.
FileSystem	getFileSystem()	Instantiates a FileSystem object.
NetworkParams	getNetworkParams()	Instantiates a NetworkParams object.
OSProcess	getProcess(int pid)	Gets information on a currently running process
int	getProcessId()	Gets the current process ID (PID).
int	getThreadCount()	Get the number of threads currently running
int	getThreadId()	Makes a best effort to get the current thread ID (TID).

Methods inherited from class LinuxOperatingSystem

getCurrentThread, getHz, getInstalledApplications, getInternetProtocolStats, getPageSize, getParentPidsFromProcFiles, getProcessCount, getReleaseFilename, getServices, getSessions, getSystemBootTime, getSystemUptime, queryAllProcesses, queryBitness, queryChildProcesses, queryDescendantProcesses, queryFamilyVersionInfo, queryManufacturer

Methods inherited from class AbstractOperatingSystem

getBitness, getChildProcesses, getChildrenOrDescendants, getChildrenOrDescendants, getDescendantProcesses, getFamily, getManufacturer, getProcesses, getVersionInfo, toString

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface OperatingSystem

getCurrentProcess, getDesktopWindows, getProcesses, getProcesses, isElevated

Field Details

HAS_UDEV

public static final boolean HAS_UDEV

This static field identifies if the udev library can be loaded.

HAS_GETTID

public static final boolean HAS_GETTID

This static field identifies if the gettid function is in the c library.

HAS_SYSCALL_GETTID

public static final boolean HAS_SYSCALL_GETTID

This static field identifies if the syscall for gettid returns sane results.

Constructor Details

LinuxOperatingSystemJNA

public LinuxOperatingSystemJNA()

Method Details

getFileSystem

public FileSystem getFileSystem()

Description copied from interface: OperatingSystem

Instantiates a FileSystem object.

Returns:

A FileSystem object.

getNetworkParams

public NetworkParams getNetworkParams()

Description copied from interface: OperatingSystem

Instantiates a NetworkParams object.

Returns:

A NetworkParams object.

getProcess

public OSProcess getProcess(int pid)

Description copied from interface: OperatingSystem

Gets information on a currently running process

Parameters:

pid - A process ID

Returns:

An OSProcess object for the specified process id if it is running; null otherwise

createOSProcess

protected OSProcess createOSProcess(int pid)

Description copied from class: LinuxOperatingSystem

Creates a new OSProcess instance for the given PID using the appropriate native implementation.

Specified by:

createOSProcess in class LinuxOperatingSystem

Parameters:

pid - the process ID

Returns:

a new OS process instance

getProcessId

public int getProcessId()

Description copied from interface: OperatingSystem

Gets the current process ID (PID).

Returns:

the Process ID of the current process

getThreadId

public int getThreadId()

Description copied from interface: OperatingSystem

Makes a best effort to get the current thread ID (TID). May not be useful in a multithreaded environment. The thread ID returned may have been short lived and no longer exist.

Thread IDs on macOS are not correlated with any other Operating System output.

Returns:

the Thread ID of the current thread if known, 0 otherwise.

getThreadCount

public int getThreadCount()

Description copied from interface: OperatingSystem

Get the number of threads currently running

Returns:

The number of threads running