On Oct 23, 2012, at 11:25 AM, Peter Sommerfeld <nore...@rubrica.at> wrote:
> Hi! > > I'm new to D an not a native speaker so I may misunderstand > the following sentence of the thread documentation. > > "final @property void isDaemon(bool val); > > Sets the daemon status for this thread. While the runtime > will wait for all normal threads to complete before tearing > down the process, daemon threads are effectively ignored and > thus will not prevent the process from terminating. In effect, > daemon threads will be terminated automatically by the OS when > the process exits." > > That sounds to me as if the daemon will be finished when the > main-thread has finished. But in my understanding daemons will > survive the termination of the main-thread and be killed by > a signal (KILL, SIGTERM etc) or finish itself. > > I think that is the case here too. Is that true ? In D, the main thread will join all non-daemon threads before calling static dtors or performing any other cleanup. Daemon threads will continue to run until the process exits. So daemon threads are basically just C-style kernel threads. > Another question: I cannot find a reference how D deals with > OS SIGNALS, especially about differences between the platform > (*nix; Windows, Mac). Can you explain or point me to the > documentation? The GC in D uses SIGUSR1 and SIGUSR2 to coordinate collections on Posix OSes (except for OSX). You're free to use any other signal just as you would in C.
