def select(self, timeout=None):
if timeout is not None:
if timeout <= 0:
timeout = 0.0
else:
# select.epoll.poll() has a resolution of 1 millisecond
# but luckily takes seconds so we don't need a wrapper
# like PollSelector. Just for better rounding.
timeout = math.ceil(timeout * 1e3) * 1e-3
timeout = float(timeout)
else:
timeout = -1.0 # epoll.poll() must have a float.
# We always want at least 1 to ensure that select can be called
# with no file descriptors registered. Otherwise will fail.
max_events = max(len(self._fd_to_key), 1)
ready = []
fd_events = _syscall_wrapper(self._epoll.poll, True,
timeout=timeout,
maxevents=max_events)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.EPOLLIN:
events |= EVENT_WRITE
if event_mask & ~select.EPOLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
python类EPOLLIN的实例源码
def register(self, fileobj, events, data=None):
key = super(EpollSelector, self).register(fileobj, events, data)
events_mask = 0
if events & EVENT_READ:
events_mask |= select.EPOLLIN
if events & EVENT_WRITE:
events_mask |= select.EPOLLOUT
_syscall_wrapper(self._epoll.register, False, key.fd, events_mask)
return key
def select(self, timeout=None):
if timeout is not None:
if timeout <= 0:
timeout = 0.0
else:
# select.epoll.poll() has a resolution of 1 millisecond
# but luckily takes seconds so we don't need a wrapper
# like PollSelector. Just for better rounding.
timeout = math.ceil(timeout * 1e3) * 1e-3
timeout = float(timeout)
else:
timeout = -1.0 # epoll.poll() must have a float.
# We always want at least 1 to ensure that select can be called
# with no file descriptors registered. Otherwise will fail.
max_events = max(len(self._fd_to_key), 1)
ready = []
fd_events = _syscall_wrapper(self._epoll.poll, True,
timeout=timeout,
maxevents=max_events)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.EPOLLIN:
events |= EVENT_WRITE
if event_mask & ~select.EPOLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def register(self, fileobj, events, data=None):
key = super(EpollSelector, self).register(fileobj, events, data)
events_mask = 0
if events & EVENT_READ:
events_mask |= select.EPOLLIN
if events & EVENT_WRITE:
events_mask |= select.EPOLLOUT
_syscall_wrapper(self._epoll.register, False, key.fd, events_mask)
return key
def select(self, timeout=None):
if timeout is not None:
if timeout <= 0:
timeout = 0.0
else:
# select.epoll.poll() has a resolution of 1 millisecond
# but luckily takes seconds so we don't need a wrapper
# like PollSelector. Just for better rounding.
timeout = math.ceil(timeout * 1e3) * 1e-3
timeout = float(timeout)
else:
timeout = -1.0 # epoll.poll() must have a float.
# We always want at least 1 to ensure that select can be called
# with no file descriptors registered. Otherwise will fail.
max_events = max(len(self._fd_to_key), 1)
ready = []
fd_events = _syscall_wrapper(self._epoll.poll, True,
timeout=timeout,
maxevents=max_events)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.EPOLLIN:
events |= EVENT_WRITE
if event_mask & ~select.EPOLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def register(self, fileobj, events, data=None):
key = super(EpollSelector, self).register(fileobj, events, data)
events_mask = 0
if events & EVENT_READ:
events_mask |= select.EPOLLIN
if events & EVENT_WRITE:
events_mask |= select.EPOLLOUT
_syscall_wrapper(self._epoll.register, False, key.fd, events_mask)
return key
def select(self, timeout=None):
if timeout is not None:
if timeout <= 0:
timeout = 0.0
else:
# select.epoll.poll() has a resolution of 1 millisecond
# but luckily takes seconds so we don't need a wrapper
# like PollSelector. Just for better rounding.
timeout = math.ceil(timeout * 1e3) * 1e-3
timeout = float(timeout)
else:
timeout = -1.0 # epoll.poll() must have a float.
# We always want at least 1 to ensure that select can be called
# with no file descriptors registered. Otherwise will fail.
max_events = max(len(self._fd_to_key), 1)
ready = []
fd_events = _syscall_wrapper(self._epoll.poll, True,
timeout=timeout,
maxevents=max_events)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.EPOLLIN:
events |= EVENT_WRITE
if event_mask & ~select.EPOLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def register(self, fileobj, events, data=None):
key = super(EpollSelector, self).register(fileobj, events, data)
events_mask = 0
if events & EVENT_READ:
events_mask |= select.EPOLLIN
if events & EVENT_WRITE:
events_mask |= select.EPOLLOUT
_syscall_wrapper(self._epoll.register, False, key.fd, events_mask)
return key
def select(self, timeout=None):
if timeout is not None:
if timeout <= 0:
timeout = 0.0
else:
# select.epoll.poll() has a resolution of 1 millisecond
# but luckily takes seconds so we don't need a wrapper
# like PollSelector. Just for better rounding.
timeout = math.ceil(timeout * 1e3) * 1e-3
timeout = float(timeout)
else:
timeout = -1.0 # epoll.poll() must have a float.
# We always want at least 1 to ensure that select can be called
# with no file descriptors registered. Otherwise will fail.
max_events = max(len(self._fd_to_key), 1)
ready = []
fd_events = _syscall_wrapper(self._epoll.poll, True,
timeout=timeout,
maxevents=max_events)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.EPOLLIN:
events |= EVENT_WRITE
if event_mask & ~select.EPOLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def register(self, fileobj, events, data=None):
key = super(EpollSelector, self).register(fileobj, events, data)
events_mask = 0
if events & EVENT_READ:
events_mask |= select.EPOLLIN
if events & EVENT_WRITE:
events_mask |= select.EPOLLOUT
_syscall_wrapper(self._epoll.register, False, key.fd, events_mask)
return key
def select(self, timeout=None):
if timeout is not None:
if timeout <= 0:
timeout = 0.0
else:
# select.epoll.poll() has a resolution of 1 millisecond
# but luckily takes seconds so we don't need a wrapper
# like PollSelector. Just for better rounding.
timeout = math.ceil(timeout * 1e3) * 1e-3
timeout = float(timeout)
else:
timeout = -1.0 # epoll.poll() must have a float.
# We always want at least 1 to ensure that select can be called
# with no file descriptors registered. Otherwise will fail.
max_events = max(len(self._fd_to_key), 1)
ready = []
fd_events = _syscall_wrapper(self._epoll.poll, True,
timeout=timeout,
maxevents=max_events)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.EPOLLIN:
events |= EVENT_WRITE
if event_mask & ~select.EPOLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def register(self, fileobj, events, data=None):
key = super().register(fileobj, events, data)
epoll_events = 0
if events & EVENT_READ:
epoll_events |= select.EPOLLIN
if events & EVENT_WRITE:
epoll_events |= select.EPOLLOUT
self._epoll.register(key.fd, epoll_events)
return key
def select(self, timeout=None):
if timeout is None:
timeout = -1
elif timeout <= 0:
timeout = 0
else:
# epoll_wait() has a resolution of 1 millisecond, round away
# from zero to wait *at least* timeout seconds.
timeout = math.ceil(timeout * 1e3) * 1e-3
# epoll_wait() expects `maxevents` to be greater than zero;
# we want to make sure that `select()` can be called when no
# FD is registered.
max_ev = max(len(self._fd_to_key), 1)
ready = []
try:
fd_event_list = self._epoll.poll(timeout, max_ev)
except InterruptedError:
return ready
for fd, event in fd_event_list:
events = 0
if event & ~select.EPOLLIN:
events |= EVENT_WRITE
if event & ~select.EPOLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def register(self, fileobj, events, data=None):
key = super(EpollSelector, self).register(fileobj, events, data)
events_mask = 0
if events & EVENT_READ:
events_mask |= select.EPOLLIN
if events & EVENT_WRITE:
events_mask |= select.EPOLLOUT
_syscall_wrapper(self._epoll.register, False, key.fd, events_mask)
return key
def register(self, fileobj, events, data=None):
key = super(EpollSelector, self).register(fileobj, events, data)
events_mask = 0
if events & EVENT_READ:
events_mask |= select.EPOLLIN
if events & EVENT_WRITE:
events_mask |= select.EPOLLOUT
_syscall_wrapper(self._epoll.register, False, key.fd, events_mask)
return key
def select(self, timeout=None):
if timeout is not None:
if timeout <= 0:
timeout = 0.0
else:
# select.epoll.poll() has a resolution of 1 millisecond
# but luckily takes seconds so we don't need a wrapper
# like PollSelector. Just for better rounding.
timeout = math.ceil(timeout * 1e3) * 1e-3
timeout = float(timeout)
else:
timeout = -1.0 # epoll.poll() must have a float.
# We always want at least 1 to ensure that select can be called
# with no file descriptors registered. Otherwise will fail.
max_events = max(len(self._fd_to_key), 1)
ready = []
fd_events = _syscall_wrapper(self._epoll.poll, True,
timeout=timeout,
maxevents=max_events)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.EPOLLIN:
events |= EVENT_WRITE
if event_mask & ~select.EPOLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def register(self, fileobj, events, data=None):
key = super(EpollSelector, self).register(fileobj, events, data)
events_mask = 0
if events & EVENT_READ:
events_mask |= select.EPOLLIN
if events & EVENT_WRITE:
events_mask |= select.EPOLLOUT
_syscall_wrapper(self._epoll.register, False, key.fd, events_mask)
return key
def select(self, timeout=None):
if timeout is not None:
if timeout <= 0:
timeout = 0.0
else:
# select.epoll.poll() has a resolution of 1 millisecond
# but luckily takes seconds so we don't need a wrapper
# like PollSelector. Just for better rounding.
timeout = math.ceil(timeout * 1e3) * 1e-3
timeout = float(timeout)
else:
timeout = -1.0 # epoll.poll() must have a float.
# We always want at least 1 to ensure that select can be called
# with no file descriptors registered. Otherwise will fail.
max_events = max(len(self._fd_to_key), 1)
ready = []
fd_events = _syscall_wrapper(self._epoll.poll, True,
timeout=timeout,
maxevents=max_events)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.EPOLLIN:
events |= EVENT_WRITE
if event_mask & ~select.EPOLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def register(self, fileobj, events, data=None):
key = super(EpollSelector, self).register(fileobj, events, data)
events_mask = 0
if events & EVENT_READ:
events_mask |= select.EPOLLIN
if events & EVENT_WRITE:
events_mask |= select.EPOLLOUT
_syscall_wrapper(self._epoll.register, False, key.fd, events_mask)
return key
def select(self, timeout=None):
if timeout is not None:
if timeout <= 0:
timeout = 0.0
else:
# select.epoll.poll() has a resolution of 1 millisecond
# but luckily takes seconds so we don't need a wrapper
# like PollSelector. Just for better rounding.
timeout = math.ceil(timeout * 1e3) * 1e-3
timeout = float(timeout)
else:
timeout = -1.0 # epoll.poll() must have a float.
# We always want at least 1 to ensure that select can be called
# with no file descriptors registered. Otherwise will fail.
max_events = max(len(self._fd_to_key), 1)
ready = []
fd_events = _syscall_wrapper(self._epoll.poll, True,
timeout=timeout,
maxevents=max_events)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.EPOLLIN:
events |= EVENT_WRITE
if event_mask & ~select.EPOLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
