Package com.sun.jna.platform.linux

Class Udev.UdevContext

java.lang.Object

com.sun.jna.PointerType

com.sun.jna.platform.linux.Udev.UdevContext

All Implemented Interfaces:

NativeMapped

Enclosing interface:

Udev

public static class Udev.UdevContext
extends PointerType

All functions require a libudev context to operate. This context can be created via Udev.udev_new(). It is used to track library state and link objects together. No global state is used by libudev, everything is always linked to a udev context. Furthermore, multiple different udev contexts can be used in parallel by multiple threads. However, a single context must not be accessed by multiple threads in parallel. The caller is responsible for providing suitable locking if they intend to use it from multiple threads.

Constructor Summary

Constructors

Constructor	Description
UdevContext()

Method Summary

Modifier and Type	Method	Description
Udev.UdevDevice	deviceNewFromSyspath(String syspath)	Creates a udev device object based on information found in /sys, annotated with properties from the udev-internal device database.
Udev.UdevEnumerate	enumerateNew()	Create a udev enumerate object.
Udev.UdevContext	ref()	Acquire a further reference to this object.
void	unref()	Drop a reference to this object.

Methods inherited from class com.sun.jna.PointerType

equals, fromNative, getPointer, hashCode, nativeType, setPointer, toNative, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

UdevContext

public UdevContext()

Method Details

ref

public Udev.UdevContext ref()

Acquire a further reference to this object.

Returns:

this object, unmodified.

unref

public void unref()

Drop a reference to this object. Once the reference count hits 0, the context object is destroyed and freed.

enumerateNew

public Udev.UdevEnumerate enumerateNew()

Create a udev enumerate object. Initially, the reference count of the enumerate object is 1.

Returns:

On success, returns the allocated enumerator. On failure, NULL is returned.

deviceNewFromSyspath

public Udev.UdevDevice deviceNewFromSyspath(String syspath)

Creates a udev device object based on information found in /sys, annotated with properties from the udev-internal device database. Initially, the reference count of the device is 1.

Parameters:

syspath - The path of the device in /sys.

Returns:

the allocated udev device. On failure, NULL is returned, and errno is set appropriately.