File: threadsync.h

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/****************************************************************************
 *   Copyright (C) 2006-2012 by Jason Ansel, Kapil Arya, and Gene Cooperman *
 *   jansel@csail.mit.edu, kapil@ccs.neu.edu, gene@ccs.neu.edu              *
 *                                                                          *
 *  This file is part of DMTCP.                                             *
 *                                                                          *
 *  DMTCP 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.                         *
 *                                                                          *
 *  DMTCP 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 DMTCP:dmtcp/src.  If not, see                        *
 *  <http://www.gnu.org/licenses/>.                                         *
 ****************************************************************************/

#ifndef THREADSYNC_H
#define THREADSYNC_H


#define WRAPPER_EXECUTION_DISABLE_CKPT()                \
  /*JLOG(DMTCP)("Acquiring wrapperExecutionLock");*/    \
  bool __wrapperExecutionLockAcquired =                 \
    dmtcp::ThreadSync::wrapperExecutionLockLock();      \
  if (__wrapperExecutionLockAcquired) {                 \
    /*JLOG(DMTCP)("Acquired wrapperExecutionLock"); */  \
  }

#define WRAPPER_EXECUTION_ENABLE_CKPT()                 \
  if (__wrapperExecutionLockAcquired) {                 \
    /*JLOG(DMTCP)("Releasing wrapperExecutionLock"); */ \
    dmtcp::ThreadSync::wrapperExecutionLockUnlock();    \
  }

#define DUMMY_WRAPPER_EXECUTION_DISABLE_CKPT()          \
  bool __wrapperExecutionLockAcquired = false;

#define WRAPPER_EXECUTION_GET_EXCL_LOCK()               \
  bool __wrapperExecutionLockAcquired                   \
    = dmtcp::ThreadSync::wrapperExecutionLockLockExcl();\
  dmtcp::ThreadSync::unsetOkToGrabLock();

#define WRAPPER_EXECUTION_RELEASE_EXCL_LOCK()           \
  WRAPPER_EXECUTION_ENABLE_CKPT();                      \
  dmtcp::ThreadSync::setOkToGrabLock();

namespace dmtcp
{
  namespace ThreadSync
  {
    void acquireLocks();
    void releaseLocks();
    void resetLocks();
    void initThread();
    void initMotherOfAll();

    void destroyDmtcpWorkerLockLock();
    void destroyDmtcpWorkerLockUnlock();
    int destroyDmtcpWorkerLockTryLock();

    void delayCheckpointsLock();
    void delayCheckpointsUnlock();

    bool wrapperExecutionLockLock();
    void wrapperExecutionLockUnlock();
    bool wrapperExecutionLockLockExcl();

    bool threadCreationLockLock();
    void threadCreationLockUnlock();

    bool libdlLockLock();
    void libdlLockUnlock();
    void waitForThreadsToFinishInitialization();
    void incrementUninitializedThreadCount();
    void decrementUninitializedThreadCount();
    void threadFinishedInitialization();

    void disableLockAcquisitionForThisThread();
    void enableLockAcquisitionForThisThread();

    bool isThisThreadHoldingAnyLocks();
    bool sendCkptSignalOnUnlock();

    bool isOkToGrabLock();
    void setOkToGrabLock();
    void unsetOkToGrabLock();

    void sendCkptSignalOnFinalUnlock();
    void setSendCkptSignalOnFinalUnlock();

#if TRACK_DLOPEN_DLSYM_FOR_LOCKS
    bool isThreadPerformingDlopenDlsym();
    void setThreadPerformingDlopenDlsym();
    void unsetThreadPerformingDlopenDlsym();
#endif

    void incrNumUserThreads();
    void processPreResumeCB();
    void waitForUserThreadsToFinishPreResumeCB();
  };
}

#endif