gipc.py 文件源码

def start(self):
            # Start grabbing SIGCHLD within libev event loop.
            gevent.get_hub().loop.install_sigchld()
            # Run new process (based on `fork()` on POSIX-compliant systems).
            super(_GProcess, self).start()
            # The occurrence of SIGCHLD is recorded asynchronously in libev.
            # This guarantees proper behavior even if the child watcher is
            # started after the child exits. Start child watcher now.
            self._sigchld_watcher = gevent.get_hub().loop.child(self.pid)
            self._returnevent = gevent.event.Event()
            self._sigchld_watcher.start(
                self._on_sigchld, self._sigchld_watcher)
            log.debug("SIGCHLD watcher for %s started.", self.pid)