org.eclipse.linuxtools.lttng.core/src/org/eclipse/linuxtools/lttng/state/model/LttngIRQState.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Alvaro Sanchez-Leon (alvsan09@gmail.com) - Initial API and implementation
  11  *******************************************************************************/
  12 package org.eclipse.linuxtools.lttng.state.model;
  13
  14 import java.util.Stack;
  15
  16 import org.eclipse.linuxtools.lttng.state.StateStrings;
  17 import org.eclipse.linuxtools.lttng.state.StateStrings.IRQMode;
  18
  19 /**
  20  * <b><u>LttvIRQState</u></b>
  21  * @author alvaro
  22  *
  23  */
  24 public class LttngIRQState implements Cloneable {
  25     // ========================================================================
  26         // Data
  27     // =======================================================================
  28         private Stack<StateStrings.IRQMode> mode_stack = new Stack<StateStrings.IRQMode>();
  29
  30     // ========================================================================
  31     // Constructor
  32     // =======================================================================
  33         public LttngIRQState() {
  34                 mode_stack.push(IRQMode.LTTV_IRQ_UNKNOWN);
  35         }
  36
  37         @Override
  38         @SuppressWarnings("unchecked")
  39     public LttngIRQState clone() {
  40             LttngIRQState newState = null;
  41
  42         try {
  43             newState = (LttngIRQState)super.clone();
  44
  45             // Clone should work correctly for all stack object that contain basic java object (String, Long, etc...)
  46             newState.mode_stack = (Stack<StateStrings.IRQMode>)this.mode_stack.clone();
  47         }
  48         catch ( CloneNotSupportedException e ) {
  49             System.out.println("Cloning failed with : " + e.getMessage() ); //$NON-NLS-1$
  50         }
  51
  52         return newState;
  53     }
  54
  55     // ========================================================================
  56     // Methods
  57     // =======================================================================
  58         public void clearIrqStack() {
  59         mode_stack.clear();
  60     }
  61
  62     public void clearAndSetBaseToIrqStack(StateStrings.IRQMode newState) {
  63         mode_stack.clear();
  64         // Ensure that there is always at least 1 item in the stack
  65         mode_stack.push(newState);
  66     }
  67
  68     public void pushToIrqStack(StateStrings.IRQMode newState) {
  69         mode_stack.push(newState);
  70     }
  71
  72     public StateStrings.IRQMode popFromIrqStack() {
  73
  74         StateStrings.IRQMode returnedMode = mode_stack.pop();
  75        if (mode_stack.size() < 1) {
  76             mode_stack.push(IRQMode.LTTV_IRQ_UNKNOWN);
  77        }
  78
  79        return returnedMode;
  80     }
  81
  82     public StateStrings.IRQMode peekFromIrqStack() {
  83         return mode_stack.peek();
  84     }
  85 }