On 23. 02. 19 1:02, Glyn Gowing wrote: > Hello everyone, > > I have a program (attached) that works correctly on my mac but does > not work with Cygwin on Windows 10. I'm running the latest version of > Cygwin (downloaded the updates two days ago) and using gcc as the c > compiler. > > What happens in the buggy execution is that the child obtains a lock > before the parent releases it. I'm using mmap and a pthread_mutex_t > object along with fork(). Again, this exact code works correctly on my > Mac running Mojave. > > I've looked at the archives and online and I can't find any hints as > to what I may be doing incorrectly here >
You cannot fork() and keep using threading primitives in the child. The child has only one thread and the mutexes are usually in a state that can be inconsistent. Basically, the only safe thing to do in multithreaded process after fork is to exec() and reinitialize your application. -- VH
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