# pylint: disable=too-many-lines, protected-access, redefined-outer-name, not-callable # pylint: disable=no-member from __future__ import absolute_import, print_function import sys from gevent.libev import _corecffi # pylint:disable=no-name-in-module,import-error # Nothing public here __all__ = [] ffi = _corecffi.ffi # pylint:disable=no-member libev = _corecffi.lib # pylint:disable=no-member if hasattr(libev, 'vfd_open'): # Must be on windows # pylint:disable=c-extension-no-member assert sys.platform.startswith("win"), "vfd functions only needed on windows" vfd_open = libev.vfd_open vfd_free = libev.vfd_free vfd_get = libev.vfd_get else: vfd_open = vfd_free = vfd_get = lambda fd: fd ##### ## NOTE on Windows: # The C implementation does several things specially for Windows; # a possibly incomplete list is: # # - the loop runs a periodic signal checker; # - the io watcher constructor is different and it has a destructor; # - the child watcher is not defined # # The CFFI implementation does none of these things, and so # is possibly NOT FUNCTIONALLY CORRECT on Win32 ##### _NOARGS = () _events = [(libev.EV_READ, 'READ'), (libev.EV_WRITE, 'WRITE'), (libev.EV__IOFDSET, '_IOFDSET'), (libev.EV_PERIODIC, 'PERIODIC'), (libev.EV_SIGNAL, 'SIGNAL'), (libev.EV_CHILD, 'CHILD'), (libev.EV_STAT, 'STAT'), (libev.EV_IDLE, 'IDLE'), (libev.EV_PREPARE, 'PREPARE'), (libev.EV_CHECK, 'CHECK'), (libev.EV_EMBED, 'EMBED'), (libev.EV_FORK, 'FORK'), (libev.EV_CLEANUP, 'CLEANUP'), (libev.EV_ASYNC, 'ASYNC'), (libev.EV_CUSTOM, 'CUSTOM'), (libev.EV_ERROR, 'ERROR')] from gevent._ffi import watcher as _base def _events_to_str(events): return _base.events_to_str(events, _events) class watcher(_base.watcher): _FFI = ffi _LIB = libev _watcher_prefix = 'ev' # Flags is a bitfield with the following meaning: # 0000 -> default, referenced (when active) # 0010 -> ev_unref has been called # 0100 -> not referenced; independent of 0010 _flags = 0 def __init__(self, _loop, ref=True, priority=None, args=_base._NOARGS): if ref: self._flags = 0 else: self._flags = 4 super(watcher, self).__init__(_loop, ref=ref, priority=priority, args=args) def _watcher_ffi_set_priority(self, priority): libev.ev_set_priority(self._watcher, priority) def _watcher_ffi_init(self, args): self._watcher_init(self._watcher, self._watcher_callback, *args) def _watcher_ffi_start(self): self._watcher_start(self.loop._ptr, self._watcher) def _watcher_ffi_ref(self): if self._flags & 2: # we've told libev we're not referenced self.loop.ref() self._flags &= ~2 def _watcher_ffi_unref(self): if self._flags & 6 == 4: # We're not referenced, but we haven't told libev that self.loop.unref() self._flags |= 2 # now we've told libev def _get_ref(self): return not self._flags & 4 def _set_ref(self, value): if value: if not self._flags & 4: return # ref is already True if self._flags & 2: # ev_unref was called, undo self.loop.ref() self._flags &= ~6 # do not want unref, no outstanding unref else: if self._flags & 4: return # ref is already False self._flags |= 4 # we're not referenced if not self._flags & 2 and libev.ev_is_active(self._watcher): # we haven't told libev we're not referenced, but it thinks we're # active so we need to undo that self.loop.unref() self._flags |= 2 # libev knows we're not referenced ref = property(_get_ref, _set_ref) def _get_priority(self): return libev.ev_priority(self._watcher) @_base.not_while_active def _set_priority(self, priority): libev.ev_set_priority(self._watcher, priority) priority = property(_get_priority, _set_priority) def feed(self, revents, callback, *args): self.callback = callback self.args = args or _NOARGS if self._flags & 6 == 4: self.loop.unref() self._flags |= 2 libev.ev_feed_event(self.loop._ptr, self._watcher, revents) if not self._flags & 1: # Py_INCREF(self) self._flags |= 1 @property def pending(self): return bool(self._watcher and libev.ev_is_pending(self._watcher)) class io(_base.IoMixin, watcher): EVENT_MASK = libev.EV__IOFDSET | libev.EV_READ | libev.EV_WRITE def _get_fd(self): return vfd_get(self._watcher.fd) @_base.not_while_active def _set_fd(self, fd): vfd = vfd_open(fd) vfd_free(self._watcher.fd) self._watcher_init(self._watcher, self._watcher_callback, vfd, self._watcher.events) fd = property(_get_fd, _set_fd) def _get_events(self): return self._watcher.events @_base.not_while_active def _set_events(self, events): self._watcher_init(self._watcher, self._watcher_callback, self._watcher.fd, events) events = property(_get_events, _set_events) @property def events_str(self): return _events_to_str(self._watcher.events) def _format(self): return ' fd=%s events=%s' % (self.fd, self.events_str) class timer(_base.TimerMixin, watcher): @property def at(self): return self._watcher.at def again(self, callback, *args, **kw): # Exactly the same as start(), just with a different initializer # function self._watcher_start = libev.ev_timer_again try: self.start(callback, *args, **kw) finally: del self._watcher_start class signal(_base.SignalMixin, watcher): pass class idle(_base.IdleMixin, watcher): pass class prepare(_base.PrepareMixin, watcher): pass class check(_base.CheckMixin, watcher): pass class fork(_base.ForkMixin, watcher): pass class async_(_base.AsyncMixin, watcher): def send(self): libev.ev_async_send(self.loop._ptr, self._watcher) @property def pending(self): return self._watcher is not None and bool(libev.ev_async_pending(self._watcher)) # Provide BWC for those that have async locals()['async'] = async_ class _ClosedWatcher(object): __slots__ = ('pid', 'rpid', 'rstatus') def __init__(self, other): self.pid = other.pid self.rpid = other.rpid self.rstatus = other.rstatus def __bool__(self): return False __nonzero__ = __bool__ class child(_base.ChildMixin, watcher): _watcher_type = 'child' def close(self): # Capture the properties we defer to our _watcher, because # we're about to discard it. closed_watcher = _ClosedWatcher(self._watcher) super(child, self).close() self._watcher = closed_watcher @property def pid(self): return self._watcher.pid @property def rpid(self): return self._watcher.rpid @rpid.setter def rpid(self, value): self._watcher.rpid = value @property def rstatus(self): return self._watcher.rstatus @rstatus.setter def rstatus(self, value): self._watcher.rstatus = value class stat(_base.StatMixin, watcher): _watcher_type = 'stat' @property def attr(self): if not self._watcher.attr.st_nlink: return return self._watcher.attr @property def prev(self): if not self._watcher.prev.st_nlink: return return self._watcher.prev @property def interval(self): return self._watcher.interval