Lines Matching refs:signal

1 """Selector event loop for Unix with signal handling."""
8 import signal
43     """Dummy signal handler."""
60     Adds signal handling and UNIX Domain Socket support to SelectorEventLoop.
76                               f"stage, skipping signal handlers removal",
89         """Add a handler for a signal.  UNIX only.
91         Raise ValueError if the signal number is invalid or uncatchable.
103             # event loop running in another thread cannot add a signal
105             signal.set_wakeup_fd(self._csock.fileno())
113             # Register a dummy signal handler to ask Python to write the signal
115             # read signal numbers from this file descriptor to handle signals.
116             signal.signal(sig, _sighandler_noop)
119             signal.siginterrupt(sig, False)
124                     signal.set_wakeup_fd(-1)
134         """Internal helper that is the actual signal handler."""
144         """Remove a handler for a signal.  UNIX only.
146         Return True if a signal handler was removed, False if not.
154         if sig == signal.SIGINT:
155             handler = signal.default_int_handler
157             handler = signal.SIG_DFL
160             signal.signal(sig, handler)
169                 signal.set_wakeup_fd(-1)
176         """Internal helper to validate a signal.
178         Raise ValueError if the signal number is invalid or uncatchable.
184         if sig not in signal.valid_signals():
185             raise ValueError(f'invalid signal number {sig}')
835     report their termination or interruption by a signal.
850         Since child watcher objects may catch the SIGCHLD signal and call
1016             self._loop.remove_signal_handler(signal.SIGCHLD)
1020             loop.add_signal_handler(signal.SIGCHLD, self._sig_chld)
1033             # as '_sig_chld' is added as a signal handler
1178         # Because of signal coalescing, we must keep calling waitpid() as
1223     This implementation registers a SIGCHLD signal handler on
1225     install own handler for this signal).
1251         handler = signal.getsignal(signal.SIGCHLD)
1255             signal.signal(signal.SIGCHLD, self._saved_sighandler)
1282         # Main thread is required for subscription on SIGCHLD signal
1286         self._saved_sighandler = signal.signal(signal.SIGCHLD, self._sig_chld)
1290             self._saved_sighandler = signal.SIG_DFL
1293         signal.siginterrupt(signal.SIGCHLD, False)
1351     It doesn't require subscription on POSIX signal