Hi all, I just found an issue with using libcxx std::thread library on NuttX. The std::thread implementation uses pthread_key_create and pthread_setspecific in order to setup a destructor that should be called to cleanup the memory. Of course, it became pretty obvious what was wrong once I read the following comment for pthread_key_create
> > * Input Parameters: > * key - A pointer to the key to create. > * destructor - An optional destructor() function that may be associated > * with each key that is invoked when a thread exits. > * > *However, this argument is ignored in the current** * > implementation.* From https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.bpxbd00/ptkycre.htm The destructor routine may be called when the thread ends. It is called > when a non-NULL value has been set for the key for this thread, using > pthread_setspecific(), and the thread: > > - Calls pthread_exit() > > > - Does a return from the start routine > > > - Is canceled because of a pthread_cancel() request. > > So it seems that the implementation would require the destructor to be called from pthread_exit and pthread_cancel. However, I'm still uncertain where in the order of operations the destructor should be called. Before or after pthread_completejoin? Before or after pthread_mutex_inconsistent? Looking for some guidance before I start working on a fix. Best, Anthony
