1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
@cython.no_gc_clear
cdef class UVPoll(UVHandle):
cdef _init(self, Loop loop, int fd):
cdef int err
self._start_init(loop)
self._handle = <uv.uv_handle_t*>PyMem_RawMalloc(sizeof(uv.uv_poll_t))
if self._handle is NULL:
self._abort_init()
raise MemoryError()
err = uv.uv_poll_init(self._loop.uvloop,
<uv.uv_poll_t *>self._handle, fd)
if err < 0:
self._abort_init()
raise convert_error(err)
self._finish_init()
self.fd = fd
self.reading_handle = None
self.writing_handle = None
@staticmethod
cdef UVPoll new(Loop loop, int fd):
cdef UVPoll handle
handle = UVPoll.__new__(UVPoll)
handle._init(loop, fd)
return handle
cdef int is_active(self):
return (self.reading_handle is not None or
self.writing_handle is not None)
cdef inline _poll_start(self, int flags):
cdef int err
self._ensure_alive()
err = uv.uv_poll_start(
<uv.uv_poll_t*>self._handle,
flags,
__on_uvpoll_event)
if err < 0:
exc = convert_error(err)
self._fatal_error(exc, True)
return
cdef inline _poll_stop(self):
cdef int err
if not self._is_alive():
return
err = uv.uv_poll_stop(<uv.uv_poll_t*>self._handle)
if err < 0:
exc = convert_error(err)
self._fatal_error(exc, True)
return
cdef:
int backend_id
system.epoll_event dummy_event
if system.PLATFORM_IS_LINUX:
# libuv doesn't remove the FD from epoll immediately
# after uv_poll_stop or uv_poll_close, causing hard
# to debug issue with dup-ed file descriptors causing
# CPU burn in epoll/epoll_ctl:
# https://github.com/MagicStack/uvloop/issues/61
#
# It's safe though to manually call epoll_ctl here,
# after calling uv_poll_stop.
backend_id = uv.uv_backend_fd(self._loop.uvloop)
if backend_id != -1:
memset(&dummy_event, 0, sizeof(dummy_event))
system.epoll_ctl(
backend_id,
system.EPOLL_CTL_DEL,
self.fd,
&dummy_event) # ignore errors
cdef is_reading(self):
return self._is_alive() and self.reading_handle is not None
cdef is_writing(self):
return self._is_alive() and self.writing_handle is not None
cdef start_reading(self, Handle callback):
cdef:
int mask = 0
if self.reading_handle is None:
# not reading right now, setup the handle
mask = uv.UV_READABLE
if self.writing_handle is not None:
# are we writing right now?
mask |= uv.UV_WRITABLE
self._poll_start(mask)
else:
self.reading_handle._cancel()
self.reading_handle = callback
cdef start_writing(self, Handle callback):
cdef:
int mask = 0
if self.writing_handle is None:
# not writing right now, setup the handle
mask = uv.UV_WRITABLE
if self.reading_handle is not None:
# are we reading right now?
mask |= uv.UV_READABLE
self._poll_start(mask)
else:
self.writing_handle._cancel()
self.writing_handle = callback
cdef stop_reading(self):
if self.reading_handle is None:
return False
self.reading_handle._cancel()
self.reading_handle = None
if self.writing_handle is None:
self.stop()
else:
self._poll_start(uv.UV_WRITABLE)
return True
cdef stop_writing(self):
if self.writing_handle is None:
return False
self.writing_handle._cancel()
self.writing_handle = None
if self.reading_handle is None:
self.stop()
else:
self._poll_start(uv.UV_READABLE)
return True
cdef stop(self):
if self.reading_handle is not None:
self.reading_handle._cancel()
self.reading_handle = None
if self.writing_handle is not None:
self.writing_handle._cancel()
self.writing_handle = None
self._poll_stop()
cdef _close(self):
if self.is_active():
self.stop()
UVHandle._close(<UVHandle>self)
cdef _fatal_error(self, exc, throw, reason=None):
try:
if self.reading_handle is not None:
try:
self.reading_handle._run()
except BaseException as ex:
self._loop._handle_exception(ex)
self.reading_handle = None
if self.writing_handle is not None:
try:
self.writing_handle._run()
except BaseException as ex:
self._loop._handle_exception(ex)
self.writing_handle = None
finally:
self._close()
cdef void __on_uvpoll_event(
uv.uv_poll_t* handle,
int status,
int events,
) noexcept with gil:
if __ensure_handle_data(<uv.uv_handle_t*>handle, "UVPoll callback") == 0:
return
cdef:
UVPoll poll = <UVPoll> handle.data
if status < 0:
exc = convert_error(status)
poll._fatal_error(exc, False)
return
if ((events & (uv.UV_READABLE | uv.UV_DISCONNECT)) and
poll.reading_handle is not None):
try:
if UVLOOP_DEBUG:
poll._loop._poll_read_events_total += 1
poll.reading_handle._run()
except BaseException as ex:
if UVLOOP_DEBUG:
poll._loop._poll_read_cb_errors_total += 1
poll._error(ex, False)
# continue code execution
if ((events & (uv.UV_WRITABLE | uv.UV_DISCONNECT)) and
poll.writing_handle is not None):
try:
if UVLOOP_DEBUG:
poll._loop._poll_write_events_total += 1
poll.writing_handle._run()
except BaseException as ex:
if UVLOOP_DEBUG:
poll._loop._poll_write_cb_errors_total += 1
poll._error(ex, False)
|
