/*
* $Id$
*
* Copyright (C) 2003-2015 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.driver.bus.usb;
import org.jnode.driver.Bus;
import org.jnode.driver.Device;
/**
* @author epr
*/
public class USBBus extends Bus {
/**
* Bitmap with in use device id's
*/
private final boolean devIdsInUse[];
/**
* The Host Controller API for this bus
*/
private final USBHostControllerAPI hcApi;
/**
* @param parent
*/
public USBBus(Device parent, USBHostControllerAPI hcApi) {
super(parent);
this.hcApi = hcApi;
this.devIdsInUse = new boolean[128];
}
/**
* Allocate a new device id.
*/
final synchronized int allocDeviceID() {
final int max = devIdsInUse.length;
for (int i = 1; i < max; i++) {
if (!devIdsInUse[i]) {
devIdsInUse[i] = true;
return i;
}
}
throw new IllegalArgumentException("Too many allocated USB device id's");
}
/**
* Free a given device id.
*/
final synchronized void freeDeviceID(int devId) {
devIdsInUse[devId] = false;
}
/**
* @return Returns the hcApi.
*/
public USBHostControllerAPI getHcApi() {
return this.hcApi;
}
}