Helfer AbstractDomestic

Jan Burse, erstellt 14. Jan 2019
package matula.util.wire;
import java.io.Closeable;
import java.io.IOException;
/**
* <p>This class provides an abstract domestic.</p>
* </p>
* Warranty & Liability
* To the extent permitted by applicable law and unless explicitly
* otherwise agreed upon, XLOG Technologies GmbH makes no warranties
* regarding the provided information. XLOG Technologies GmbH assumes
* no liability that any problems might be solved with the information
* provided by XLOG Technologies GmbH.
* <p/>
* Rights & License
* All industrial property rights regarding the information - copyright
* and patent rights in particular - are the sole property of XLOG
* Technologies GmbH. If the company was not the originator of some
* excerpts, XLOG Technologies GmbH has at least obtained the right to
* reproduce, change and translate the information.
* <p/>
* Reproduction is restricted to the whole unaltered document. Reproduction
* of the information is only allowed for non-commercial uses. Selling,
* giving away or letting of the execution of the library is prohibited.
* The library can be distributed as part of your applications and libraries
* for execution provided this comment remains unchanged.
* <p/>
* Restrictions
* Only to be distributed with programs that add significant and primary
* functionality to the library. Not to be distributed with additional
* software intended to replace any components of the library.
* <p/>
* Trademarks
* Jekejeke is a registered trademark of XLOG Technologies GmbH.
*/
public abstract class AbstractDomestic {
public final static int MASK_LIVESTOCK_NOSG = 0x00000001;
public int flags;
public Object signal;
public Thread thread;
public Object source;
public Closeable closer;
/**
* <p>Set the mask.</p>
*
* @param f The new mask.
* @return The old mask.
*/
public final boolean setMask(boolean f) {
synchronized (this) {
boolean h = (flags & MASK_LIVESTOCK_NOSG) == 0;
if (f) {
flags &= ~MASK_LIVESTOCK_NOSG;
if (signal != null && thread != null)
interruptWithCloser(thread);
} else {
if (signal != null && thread != null) {
if (thread != Thread.currentThread())
throw new RuntimeException("not owner");
Thread.interrupted();
}
flags |= MASK_LIVESTOCK_NOSG;
}
return h;
}
}
/**
* <p>Set the signal.</p>
*
* @param m The signal.
* @return The old signal.
*/
public final Object setSignal(Object m) {
synchronized (this) {
Object h = signal;
if (m != null) {
signal = m;
if ((flags & MASK_LIVESTOCK_NOSG) == 0
&& thread != null)
interruptWithCloser(thread);
} else {
if ((flags & MASK_LIVESTOCK_NOSG) == 0
&& thread != null) {
if (thread != Thread.currentThread())
throw new RuntimeException("not owner");
Thread.interrupted();
}
signal = null;
}
return h;
}
}
/**
* <p>Set the thread.</p>
*
* @param t The thread.
*/
public final void setThread(Thread t) {
synchronized (this) {
if (t != null) {
thread = t;
if ((flags & MASK_LIVESTOCK_NOSG) == 0
&& signal != null)
interruptWithCloser(thread);
} else {
if ((flags & MASK_LIVESTOCK_NOSG) == 0
&& signal != null) {
if (thread != Thread.currentThread())
throw new RuntimeException("not owner");
Thread.interrupted();
}
thread = null;
}
}
}
/**
* <p>Interrupt a thread taking a closer in account.</p>
*
* @param t The thread.
*/
private void interruptWithCloser(Thread t) {
Closeable c = closer;
if (c != null) {
t.interrupt();
try {
c.close();
} catch (IOException x) {
/* ignore */
}
} else {
t.interrupt();
}
}
}

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