forked from panjf2000/gnet
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy patheventloop_windows.go
More file actions
270 lines (238 loc) · 5.92 KB
/
Copy patheventloop_windows.go
File metadata and controls
270 lines (238 loc) · 5.92 KB
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
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
// Copyright (c) 2019 Andy Pan
// Copyright (c) 2018 Joshua J Baker
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package gnet
import (
"context"
"runtime"
"sync/atomic"
"time"
"unsafe"
"github.com/panjf2000/gnet/errors"
"github.com/panjf2000/gnet/logging"
"github.com/panjf2000/gnet/pool/bytebuffer"
)
type eventloop struct {
internalEventloop
// Prevents eventloop from false sharing by padding extra memory with the difference
// between the cache line size "s" and (eventloop mod s) for the most common CPU architectures.
_ [64 - unsafe.Sizeof(internalEventloop{})%64]byte
}
//nolint:structcheck
type internalEventloop struct {
ch chan interface{} // command channel
idx int // loop index
svr *server // server in loop
connCount int32 // number of active connections in event-loop
connections map[*stdConn]struct{} // track all the sockets bound to this loop
eventHandler EventHandler // user eventHandler
}
func (el *eventloop) getLogger() logging.Logger {
return el.svr.opts.Logger
}
func (el *eventloop) addConn(delta int32) {
atomic.AddInt32(&el.connCount, delta)
}
func (el *eventloop) loadConn() int32 {
return atomic.LoadInt32(&el.connCount)
}
func (el *eventloop) loopRun(lockOSThread bool) {
if lockOSThread {
runtime.LockOSThread()
defer runtime.UnlockOSThread()
}
var err error
defer func() {
el.svr.signalShutdownWithErr(err)
el.svr.loopWG.Done()
el.loopEgress()
el.svr.loopWG.Done()
}()
for i := range el.ch {
switch v := i.(type) {
case error:
err = v
case *stdConn:
err = el.loopAccept(v)
case *tcpConn:
if v.c.conn == nil {
err = errors.ErrConnectionClosed
break
}
v.c.buffer = v.bb
err = el.loopRead(v.c)
case *udpConn:
err = el.loopReadUDP(v.c)
case *stderr:
err = el.loopError(v.c, v.err)
case *signalTask:
err = v.run(v.c)
signalTaskPool.Put(i)
case *dataTask:
_, err = v.run(v.buf)
dataTaskPool.Put(i)
}
if err == errors.ErrServerShutdown {
el.getLogger().Debugf("event-loop(%d) is exiting in terms of the demand from user, %v", el.idx, err)
break
} else if err != nil {
el.getLogger().Debugf("event-loop(%d) got a nonlethal error: %v", el.idx, err)
}
}
}
func (el *eventloop) loopAccept(c *stdConn) error {
el.connections[c] = struct{}{}
el.addConn(1)
out, action := el.eventHandler.OnOpened(c)
if out != nil {
el.eventHandler.PreWrite(c)
_, _ = c.conn.Write(out)
el.eventHandler.AfterWrite(c, out)
}
return el.handleAction(c, action)
}
func (el *eventloop) loopRead(c *stdConn) error {
for inFrame, _ := c.read(); inFrame != nil; inFrame, _ = c.read() {
out, action := el.eventHandler.React(inFrame, c)
if out != nil {
if _, err := c.write(out); err != nil {
return el.loopError(c, err)
}
}
switch action {
case None:
case Close:
return el.loopCloseConn(c)
case Shutdown:
return errors.ErrServerShutdown
}
}
_, _ = c.inboundBuffer.Write(c.buffer.Bytes())
bytebuffer.Put(c.buffer)
c.buffer = nil
return nil
}
func (el *eventloop) loopCloseConn(c *stdConn) error {
if c.conn != nil {
return c.conn.SetReadDeadline(time.Now())
}
return nil
}
func (el *eventloop) loopEgress() {
var closed bool
for v := range el.ch {
switch v := v.(type) {
case error:
if v == errCloseAllConns {
closed = true
for c := range el.connections {
_ = el.loopCloseConn(c)
}
}
case *stderr:
_ = el.loopError(v.c, v.err)
}
if closed && len(el.connections) == 0 {
break
}
}
}
func (el *eventloop) loopTicker(ctx context.Context) {
if el == nil {
return
}
var (
action Action
delay time.Duration
timer *time.Timer
)
defer func() {
if timer != nil {
timer.Stop()
}
}()
for {
delay, action = el.eventHandler.Tick()
if action == Shutdown {
el.ch <- errors.ErrServerShutdown
el.getLogger().Debugf("stopping ticker in event-loop(%d) from Tick()", el.idx)
}
if timer == nil {
timer = time.NewTimer(delay)
} else {
timer.Reset(delay)
}
select {
case <-ctx.Done():
el.getLogger().Debugf("stopping ticker in event-loop(%d) from Server, error:%v", el.idx, ctx.Err())
return
case <-timer.C:
}
}
}
func (el *eventloop) loopError(c *stdConn, err error) (e error) {
defer func() {
if _, ok := el.connections[c]; !ok {
return // ignore stale wakes.
}
if err = c.conn.Close(); err != nil {
el.getLogger().Errorf("failed to close connection(%s), error: %v", c.remoteAddr.String(), err)
if e == nil {
e = err
}
}
delete(el.connections, c)
el.addConn(-1)
c.releaseTCP()
}()
if el.eventHandler.OnClosed(c, err) == Shutdown {
return errors.ErrServerShutdown
}
return
}
func (el *eventloop) loopWake(c *stdConn) error {
if _, ok := el.connections[c]; !ok {
return nil // ignore stale wakes.
}
out, action := el.eventHandler.React(nil, c)
if out != nil {
if _, err := c.write(out); err != nil {
return err
}
}
return el.handleAction(c, action)
}
func (el *eventloop) handleAction(c *stdConn, action Action) error {
switch action {
case None:
return nil
case Close:
return el.loopCloseConn(c)
case Shutdown:
return errors.ErrServerShutdown
default:
return nil
}
}
func (el *eventloop) loopReadUDP(c *stdConn) error {
out, action := el.eventHandler.React(c.buffer.Bytes(), c)
if out != nil {
_ = c.SendTo(out)
}
if action == Shutdown {
return errors.ErrServerShutdown
}
c.releaseUDP()
return nil
}