org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/internal/lttng/ui/views/resources/evProcessor/ResourcesAfterUpdateHandlers.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  *       Michel Dagenais (michel.dagenais@polymtl.ca) - Reference C implementation, used with permission
  12  *******************************************************************************/
  13 package org.eclipse.linuxtools.internal.lttng.ui.views.resources.evProcessor;
  14
  15 import org.eclipse.linuxtools.internal.lttng.core.event.LttngEvent;
  16 import org.eclipse.linuxtools.internal.lttng.core.state.evProcessor.ILttngEventProcessor;
  17 import org.eclipse.linuxtools.internal.lttng.core.state.model.LttngTraceState;
  18
  19 /**
  20  * Creates instances of specific after state update handlers, per corresponding
  21  * event.
  22  *
  23  * @author alvaro
  24  *
  25  */
  26 public class ResourcesAfterUpdateHandlers {
  27
  28         /**
  29          * <p>
  30          * Handles: LTT_EVENT_SCHED_SCHEDULE
  31          * </p>
  32          * Replace C function named "after_schedchange_hook" in eventhooks.c
  33          * <p>
  34          * Fields: LTT_FIELD_PREV_PID, LTT_FIELD_NEXT_PID, LTT_FIELD_PREV_STATE
  35          * </p>
  36          *
  37          * @return
  38          */
  39         final ILttngEventProcessor getAfterSchedChangeHandler() {
  40                 AbsResourcesTRangeUpdate handler = new AbsResourcesTRangeUpdate() {
  41
  42                         @Override
  43                         public boolean process(LttngEvent trcEvent, LttngTraceState traceSt) {
  44
  45                                 // TODO: After sched scheduler handler should implement an
  46                                 // update to the current resource data, similar to
  47                                 // current_hash_data in C
  48                                 // We don't keep track of current hashed resource, we look in
  49                                 // the hash table every time. keeping track of current hash may
  50                                 // improve performance, although needs to be bench marked to
  51                                 // verify
  52                                 // if there's is a real gain.
  53
  54                                 // process_list->current_hash_data[trace_num][process_in->cpu] =
  55                                 // hashed_process_data_in;
  56
  57                                 return false;
  58                         }
  59                 };
  60
  61                 return handler;
  62         }
  63
  64         /**
  65          * Drawing stuff ?
  66          */
  67         // int after_request(void *hook_data, void *call_data)
  68         // int after_chunk(void *hook_data, void *call_data)
  69         // int before_statedump_end(void *hook_data, void *call_data)
  70 }