File: alarm.cpp

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dmtcp 2.6.0-1
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/* FILE: alarm.cpp
 * AUTHOR: Rohan Garg
 * EMAIL: rohgarg@ccs.neu.edu
 * Copyright (C) 2015 Rohan Garg
 *
 * This program 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 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>

#include "dmtcp.h"

#include "jassert.h"

void
dmtcp_Alarm_EventHook(DmtcpEvent_t event, DmtcpEventData_t *data)
{
  static unsigned int timeLeft = 0;
  switch (event) {
    case DMTCP_EVENT_WRITE_CKPT:
      {
        timeLeft = alarm(0);
        JLOG(DMTCP)("*** Alarm stopped. ***") (timeLeft);
        break;
      }
    case DMTCP_EVENT_THREADS_RESUME:
      {
        /* Need to restart the timer on resume/restart. */
        if (timeLeft > 0) {
          JLOG(DMTCP)("*** Resuming alarm. ***") (timeLeft);
          timeLeft = alarm(timeLeft);
        }
        break;
      }
    default:
      break;
  }
}