-
Notifications
You must be signed in to change notification settings - Fork 29.1k
/
destroy.js
168 lines (140 loc) Β· 3.27 KB
/
destroy.js
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
'use strict';
// Undocumented cb() API, needed for core, not for public API.
// The cb() will be invoked synchronously if _destroy is synchronous.
// If cb is passed no 'error' event will be emitted.
function destroy(err, cb) {
const r = this._readableState;
const w = this._writableState;
// TODO(ronag): readable & writable = false?
if (err) {
if (w) {
w.errored = true;
}
if (r) {
r.errored = true;
}
}
if ((w && w.destroyed) || (r && r.destroyed)) {
if (cb) {
cb(err);
} else if (err) {
process.nextTick(emitErrorNT, this, err);
}
return this;
}
// We set destroyed to true before firing error callbacks in order
// to make it re-entrance safe in case destroy() is called within callbacks
if (w) {
w.destroyed = true;
}
if (r) {
r.destroyed = true;
}
this._destroy(err || null, (err) => {
if (err) {
if (w) {
w.errored = true;
}
if (r) {
r.errored = true;
}
}
if (cb) {
// Invoke callback before scheduling emitClose so that callback
// can schedule before.
cb(err);
// Don't emit 'error' if passed a callback.
process.nextTick(emitCloseNT, this);
} else if (err) {
process.nextTick(emitErrorCloseNT, this, err);
} else {
process.nextTick(emitCloseNT, this);
}
});
return this;
}
function emitErrorCloseNT(self, err) {
emitErrorNT(self, err);
emitCloseNT(self);
}
function emitCloseNT(self) {
const r = self._readableState;
const w = self._writableState;
if (w) {
w.closed = true;
}
if (r) {
r.closed = true;
}
if ((w && w.emitClose) || (r && r.emitClose)) {
self.emit('close');
}
}
function emitErrorNT(self, err) {
const r = self._readableState;
const w = self._writableState;
if ((w && w.errorEmitted) || (r && r.errorEmitted)) {
return;
}
if (w) {
w.errorEmitted = true;
}
if (r) {
r.errorEmitted = true;
}
self.emit('error', err);
}
function undestroy() {
const r = this._readableState;
const w = this._writableState;
if (r) {
r.destroyed = false;
r.errored = false;
r.closed = false;
r.reading = false;
r.ended = false;
r.endEmitted = false;
r.errorEmitted = false;
}
if (w) {
w.destroyed = false;
w.errored = false;
w.closed = false;
w.ended = false;
w.ending = false;
w.finalCalled = false;
w.prefinished = false;
w.finished = false;
w.errorEmitted = false;
}
}
function errorOrDestroy(stream, err, sync) {
// We have tests that rely on errors being emitted
// in the same tick, so changing this is semver major.
// For now when you opt-in to autoDestroy we allow
// the error to be emitted nextTick. In a future
// semver major update we should change the default to this.
const r = stream._readableState;
const w = stream._writableState;
// TODO(ronag): readable & writable = false?
if ((r && r.autoDestroy) || (w && w.autoDestroy))
stream.destroy(err);
else if (err) {
if (w) {
w.errored = true;
}
if (r) {
r.errored = true;
}
if (sync) {
process.nextTick(emitErrorNT, stream, err);
} else {
emitErrorNT(stream, err);
}
}
}
module.exports = {
destroy,
undestroy,
errorOrDestroy
};