[AGENT++] A question concerning reentrent.h, reentrent.cpp (snmp++ 3.2.15)

[Petersen, Thorsten]

Hello

 

Inside the file reentrant.h the class SnmpSynchronized uses POSIX mutexes if the symbol "_THREADS" is defined and if we are not using windows.

 

class DLLOPT SnmpSynchronized 

{

 ...

#ifdef _THREADS

#ifdef WIN32

  CRITICAL_SECTION      _mutex;

#else

  pthread_mutex_t      _mutex;

#endif

#endif

  void lock();

  void unlock();

};

 

Using these classes, I found that the destructor of class SnmpSynchronized does not free the POSIX mutex with a call to pthread_mutex_destroy. As far as I understood the POSIX documentation, a call to pthread_mutex_destroy frees allocated resources associated with the mutex. Am I right or is the call to pthread_mutex_destroy obsolete?

 

Moreover, after a look inside the Agent++ library (3.5.22), I found that POSIX mutexes are only used it the symbol POSIX_THREADS is defined, not necessarily if only the symbol _THREADS is defined. Is this ok?

 

Regards, Thorsten

 

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Thorsten Petersen <thorsten.petersen(at)draeger.com> 

Dräger Medical AG & Co. KGaA 

Moislinger Allee 53-55 

23542 Luebeck, Germany 

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