Inventor/threads/SbThreadMutex.h

Go to the documentation of this file.

/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
 ***              AND IS DISTRIBUTED UNDER A LICENSE AGREEMENT.                     ***
 ***                                                                                ***
 ***  REPRODUCTION, DISCLOSURE,  OR USE,  IN WHOLE OR IN PART,  OTHER THAN AS       ***
 ***  SPECIFIED  IN THE LICENSE ARE  NOT TO BE  UNDERTAKEN  EXCEPT WITH PRIOR       ***
 ***  WRITTEN AUTHORIZATION OF FEI S.A.S.                                           ***
 ***                                                                                ***
 ***                        RESTRICTED RIGHTS LEGEND                                ***
 ***  USE, DUPLICATION, OR DISCLOSURE BY THE GOVERNMENT OF THE CONTENT OF THIS      ***
 ***  WORK OR RELATED DOCUMENTATION IS SUBJECT TO RESTRICTIONS AS SET FORTH IN      ***
 ***  SUBPARAGRAPH (C)(1) OF THE COMMERCIAL COMPUTER SOFTWARE RESTRICTED RIGHT      ***
 ***  CLAUSE  AT FAR 52.227-19  OR SUBPARAGRAPH  (C)(1)(II)  OF  THE RIGHTS IN      ***
 ***  TECHNICAL DATA AND COMPUTER SOFTWARE CLAUSE AT DFARS 52.227-7013.             ***
 ***                                                                                ***
 ***                   COPYRIGHT (C) 1996-2020 BY FEI S.A.S,                        ***
 ***                        BORDEAUX, FRANCE                                        ***
 ***                      ALL RIGHTS RESERVED                                       ***
**=======================================================================*/
/*=======================================================================
** Author      : Julien Chaplier (MMM yyyy)
**=======================================================================*/


#ifndef _SB_THREAD_MUTEX_H_
#define _SB_THREAD_MUTEX_H_

#include <Inventor/SbBase.h>

#ifdef _WIN32
//#include <process.h>
#else
#ifdef OIV_MULTI_THREADS
#include <pthread.h>
#endif // OIV_MULTI_THREADS
#endif

class  SbThreadMutex {

 public:
  SbThreadMutex(const SbBool force = FALSE) ;

#ifndef HIDDEN_FROM_DOC
  ~SbThreadMutex() ;
#endif // HIDDEN_FROM_DOC

  int lock()
  { if (mutex) return _lock(); else return 0; }

  int unlock()
  { if (mutex) return _unlock(); else return 0; }

  SbBool trylock()
  { if (mutex) return _trylock(); else return 0; }

private:
#if defined(__linux__) || defined(__APPLE__) || defined(sun)
  pthread_mutex_t* getMutex() { return mutex; }
#endif

private:

#ifdef _WIN32
  void* mutex;
#if defined(_DEBUG)
  LONG volatile numLocks;
  unsigned int m_lockOwner;
#endif
#else
  pthread_mutex_t* mutex ;
  pthread_mutexattr_t* mta;
  pthread_t thread_id ;
  int count ;
#endif
private:

  // copy-constructing this class is invalid
  SbThreadMutex(const SbThreadMutex& /*other*/)
  {
  }

  // real implementation of each public method
  // it avoid function call when not in multithread mode.
  int _lock() ;
  int _unlock() ;
  SbBool _trylock();
};

// keep this header for compatibility purpose
#include <Inventor/threads/SbThreadAutoLock.h>

#endif // _SB_THREAD_MUTEX_H_

---

Open Inventor Toolkit reference manual, generated on 12 Feb 2024
Copyright © Thermo Fisher Scientific All rights reserved. http://www.openinventor.com/