You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
2.9 KiB
91 lines
2.9 KiB
/**
|
|
* Copyright (C) 2003 Jeremy Booth (jeremy@newdawnsoftware.com)
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer. Redistributions in binary
|
|
* form must reproduce the above copyright notice, this list of conditions and
|
|
* the following disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
* The name of the author may not be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
|
|
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
|
|
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
|
|
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
|
|
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
|
|
*/
|
|
package net.java.games.input;
|
|
|
|
import java.io.IOException;
|
|
import java.util.List;
|
|
import java.util.ArrayList;
|
|
|
|
/**
|
|
* Linux doesn't have proper support for force feedback
|
|
* from different threads since it relies on PIDs
|
|
* to determine ownership of a particular effect slot.
|
|
* Therefore we have to hack around this by
|
|
* making sure everything related to FF
|
|
* (including the final device close that performs
|
|
* and implicit deletion of all the process' effects)
|
|
* is run on a single thread.
|
|
*/
|
|
final class LinuxDeviceThread extends Thread {
|
|
private final List<LinuxDeviceTask> tasks = new ArrayList<>();
|
|
|
|
public LinuxDeviceThread() {
|
|
setDaemon(true);
|
|
start();
|
|
}
|
|
|
|
public synchronized final void run() {
|
|
while (true) {
|
|
if (!tasks.isEmpty()) {
|
|
LinuxDeviceTask task = tasks.remove(0);
|
|
task.doExecute();
|
|
synchronized (task) {
|
|
task.notify();
|
|
}
|
|
} else {
|
|
try {
|
|
wait();
|
|
} catch (InterruptedException e) {
|
|
// ignore
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
public final Object execute(LinuxDeviceTask task) throws IOException {
|
|
synchronized (this) {
|
|
tasks.add(task);
|
|
notify();
|
|
}
|
|
synchronized (task) {
|
|
while (task.getState() == LinuxDeviceTask.INPROGRESS) {
|
|
try {
|
|
task.wait();
|
|
} catch (InterruptedException e) {
|
|
// ignore
|
|
}
|
|
}
|
|
}
|
|
switch (task.getState()) {
|
|
case LinuxDeviceTask.COMPLETED:
|
|
return task.getResult();
|
|
case LinuxDeviceTask.FAILED:
|
|
throw task.getException();
|
|
default:
|
|
throw new RuntimeException("Invalid task state: " + task.getState());
|
|
}
|
|
}
|
|
}
|
|
|