SbThreadAutoLock.h

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**=======================================================================*/
/*=======================================================================
** Author      : David Beilloin (Feb 2008)
**=======================================================================*/
 
#ifndef _SB_THREAD_AUTO_LOCK_H_
#define _SB_THREAD_AUTO_LOCK_H_
 
#include <Inventor/SbBase.h>
#include <Inventor/threads/SbThreadMutex.h>
 
class SbThreadRWMutex;
 
class  SbThreadAutoLock {
 public:
  SbThreadAutoLock(SbThreadMutex *mutex)
  {
    m_mutex = mutex;
    if ( m_mutex )
      m_mutex->lock();
  }
 
  SbThreadAutoLock( SbThreadMutex &mutex )
  {
    m_mutex = &mutex;
    m_mutex->lock();
  }
 
#ifndef HIDDEN_FROM_DOC
  ~SbThreadAutoLock()
  {
    if ( m_mutex )
      m_mutex->unlock();
  }
#endif // HIDDEN_FROM_DOC
 
 private:
  SbThreadMutex *m_mutex;
};
 
class  SbThreadAutoReadLock {
 public:
  SbThreadAutoReadLock( SbThreadRWMutex *mutex );
  SbThreadAutoReadLock( SbThreadRWMutex &mutex );
 
#ifndef HIDDEN_FROM_DOC
  ~SbThreadAutoReadLock();
#endif
 
  int unlock();
  int relock();
 
 private:
  SbThreadRWMutex *m_mutex;
  SbBool           m_isLocked;
 
};
 
class  SbThreadAutoWriteLock {
 public:
  SbThreadAutoWriteLock( SbThreadRWMutex *mutex );
  SbThreadAutoWriteLock( SbThreadRWMutex &mutex );
 
#ifndef HIDDEN_FROM_DOC
  ~SbThreadAutoWriteLock();
#endif
 
  int unlock();
  int relock();
 
 private:
  SbThreadRWMutex *m_mutex;
  SbBool           m_isLocked;
 
};
 
#endif //_SB_THREAD_AUTO_LOCK_H_