def __init__(self, kind, value, maxvalue, *, ctx): if ctx is None: ctx = context._default_context.get_context() name = ctx.get_start_method() unlink_now = sys.platform == 'win32' or name == 'fork' for i in range(100): try: sl = self._semlock = _multiprocessing.SemLock( kind, value, maxvalue, self._make_name(), unlink_now) except FileExistsError: pass else: break else: raise FileExistsError('cannot find name for semaphore') util.debug('created semlock with handle %s' % sl.handle) self._make_methods() if sys.platform != 'win32': def _after_fork(obj): obj._semlock._after_fork() util.register_after_fork(self, _after_fork) if self._semlock.name is not None: # We only get here if we are on Unix with forking # disabled. When the object is garbage collected or the # process shuts down we unlink the semaphore name from .semaphore_tracker import register register(self._semlock.name) util.Finalize(self, SemLock._cleanup, (self._semlock.name, ), exitpriority=0)
def __init__(self, kind, value, maxvalue): sl = self._semlock = _multiprocessing.SemLock(kind, value, maxvalue) debug('created semlock with handle %s' % sl.handle) self._make_methods() if sys.platform != 'win32': def _after_fork(obj): obj._semlock._after_fork() register_after_fork(self, _after_fork)