In man/man7/signal.7 it says: > If a blocked call to one of the following interfaces is interrupted > by a signal handler, then the call is automatically restarted after > the signal handler returns if the SA_RESTART flag was used; > otherwise the call fails with the error EINTR: > (...) > • pthread_mutex_lock(3), pthread_cond_wait(3), and related APIs. I don't understand this, in my experiments neither pthread_mutex_lock() nor pthread_cond_wait() return EINTR even if signal handler was installed without using SA_RESTART flag. The underlying futex() call indeed fails with EINTR but it's called again by both glibc and musl. Additionally both man/man3/pthread_mutex_lock.3 and man/man3/pthread_cond_wait.3 say that these functions do not return EINTR. Is my understanding of the signal.7 wrong or does it need some work? -- Arkadiusz Drabczyk <arkadiusz@xxxxxxxxxxxx>
