Hi Constantine, > I wrote a function that downloads file using libcurl. I found out that > when the the downloading process in progress by `curl_easy_perform` I > cannot interrupt downloading by Ctrl-C. Even `killall picolisp` does > not work. > > How I can make signals work during FFI?
PicoLisp FFI does not do anything with signals. However, PicoLisp itself sets a signal handler for SIGINT (which is normally sent by Ctrl-C) to interrupt running Lisp code and drop into a breakpoint. While code is executing in a library like libcurl, all signals defined to be handled by PicoLisp will be *delayed* until the native code completes and Lisp takes back control. Note that killing will indeed work if you don't start a REPL (i.e. in a script). Then SIGINT retains its default behavior of terminating the process. I see no way at the moment for a native function called from a REPL, simply because such foreign functions do not know about Pil's signals. What if you do (call "curl" ...) instead of a native call, and kill the curl process? ☺/ A!ex -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
