analysis/org.eclipse.tracecompass.analysis.os.linux.core/src/org/eclipse/tracecompass/internal/analysis/os/linux/core/latency/SystemCall.java

   1 /*******************************************************************************
   2  * Copyright (c) 2015, 2016 EfficiOS Inc., Alexandre Montplaisir and others
   3  *
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *******************************************************************************/
   9
  10 package org.eclipse.tracecompass.internal.analysis.os.linux.core.latency;
  11
  12 import java.io.IOException;
  13 import java.io.ObjectInputStream;
  14 import java.io.ObjectOutputStream;
  15
  16 import org.eclipse.jdt.annotation.NonNull;
  17 import org.eclipse.tracecompass.segmentstore.core.ISegment;
  18
  19 /**
  20  * A linux kernel system call, represented as an {@link ISegment}.
  21  *
  22  * @author Alexandre Montplaisir
  23  * @since 2.0
  24  */
  25 public final class SystemCall implements ISegment {
  26
  27     private static final long serialVersionUID = 1554494342105208730L;
  28
  29     /**
  30      * The subset of information that is available from the syscall entry event.
  31      */
  32     public static class InitialInfo {
  33
  34         private long fStartTime;
  35         private String fName;
  36
  37         /**
  38          * @param startTime
  39          *            Start time of the system call
  40          * @param name
  41          *            Name of the system call
  42          */
  43         public InitialInfo(
  44                 long startTime,
  45                 String name) {
  46             fStartTime = startTime;
  47             fName = name.intern();
  48         }
  49     }
  50
  51     private long fStartTime;
  52     private long fEndTime;
  53     private String fName;
  54
  55     /**
  56      * @param info
  57      *            Initial information of the system call
  58      * @param endTime
  59      *            End time of the system call
  60      */
  61     public SystemCall(
  62             InitialInfo info,
  63             long endTime) {
  64         fStartTime = info.fStartTime;
  65         fName = info.fName;
  66         fEndTime = endTime;
  67     }
  68
  69     private void writeObject(ObjectOutputStream out) throws IOException {
  70         out.writeLong(fStartTime);
  71         out.writeLong(fEndTime);
  72         out.writeUTF(fName);
  73     }
  74
  75     private void readObject(ObjectInputStream in) throws IOException {
  76         fStartTime = in.readLong();
  77         fEndTime = in.readLong();
  78         fName = in.readUTF().intern();
  79     }
  80
  81     @Override
  82     public long getStart() {
  83         return fStartTime;
  84     }
  85
  86     @Override
  87     public long getEnd() {
  88         return fEndTime;
  89     }
  90
  91     /**
  92      * Get the name of the system call
  93      *
  94      * @return Name
  95      */
  96     public String getName() {
  97         return fName;
  98     }
  99
 100     @Override
 101     public int compareTo(@NonNull ISegment o) {
 102         int ret = ISegment.super.compareTo(o);
 103         if (ret != 0) {
 104             return ret;
 105         }
 106         return toString().compareTo(o.toString());
 107     }
 108
 109     @Override
 110     public String toString() {
 111         return "Start Time = " + getStart() + //$NON-NLS-1$
 112                 "; End Time = " + getEnd() + //$NON-NLS-1$
 113                 "; Duration = " + getLength() + //$NON-NLS-1$
 114                 "; Name = " + getName(); //$NON-NLS-1$
 115     }
 116 }