> That's not safe. PIDs are recycled. Yup, didn't think of that possibility, thanks for pointing it out. > You may (should?) be able to initialize a pthread-b

> That's not safe. PIDs are recycled. Yup, didn't think of that possibility, thanks for pointing it out. > You may (should?) be able to initialize a pthread-based PTHREAD_PROCESS_SHARED + PTHREAD_MUTEX_ROBUST mutex in a shared memory region and have everything just work. Trying this now, I'll make another post if I can get it working. Thanks for the suggestion.