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lib: move _stream_wrap into internals
This makes a subsequent possible deprecation easier. PR-URL: #16158 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: Franziska Hinkelmann <[email protected]> Reviewed-By: Tobias Nießen <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,223 +1,3 @@ | ||
| 'use strict'; | ||
|
|
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| const assert = require('assert'); | ||
| const util = require('util'); | ||
| const { Socket } = require('net'); | ||
| const { JSStream } = process.binding('js_stream'); | ||
| const uv = process.binding('uv'); | ||
| const debug = util.debuglog('stream_wrap'); | ||
| const errors = require('internal/errors'); | ||
|
|
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| function StreamWrap(stream) { | ||
| const handle = new JSStream(); | ||
|
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| this.stream = stream; | ||
|
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| this._list = null; | ||
|
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| const self = this; | ||
| handle.close = function(cb) { | ||
| debug('close'); | ||
| self.doClose(cb); | ||
| }; | ||
| handle.isAlive = function() { | ||
| return self.isAlive(); | ||
| }; | ||
| handle.isClosing = function() { | ||
| return self.isClosing(); | ||
| }; | ||
| handle.onreadstart = function() { | ||
| return self.readStart(); | ||
| }; | ||
| handle.onreadstop = function() { | ||
| return self.readStop(); | ||
| }; | ||
| handle.onshutdown = function(req) { | ||
| return self.doShutdown(req); | ||
| }; | ||
| handle.onwrite = function(req, bufs) { | ||
| return self.doWrite(req, bufs); | ||
| }; | ||
|
|
||
| this.stream.pause(); | ||
| this.stream.on('error', function onerror(err) { | ||
| self.emit('error', err); | ||
| }); | ||
| this.stream.on('data', function ondata(chunk) { | ||
| if (typeof chunk === 'string' || this._readableState.objectMode === true) { | ||
| // Make sure that no further `data` events will happen | ||
| this.pause(); | ||
| this.removeListener('data', ondata); | ||
|
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| self.emit('error', new errors.Error('ERR_STREAM_WRAP')); | ||
| return; | ||
| } | ||
|
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| debug('data', chunk.length); | ||
| if (self._handle) | ||
| self._handle.readBuffer(chunk); | ||
| }); | ||
| this.stream.once('end', function onend() { | ||
| debug('end'); | ||
| if (self._handle) | ||
| self._handle.emitEOF(); | ||
| }); | ||
|
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| Socket.call(this, { | ||
| handle: handle | ||
| }); | ||
| } | ||
| util.inherits(StreamWrap, Socket); | ||
| module.exports = StreamWrap; | ||
|
|
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| // require('_stream_wrap').StreamWrap | ||
| StreamWrap.StreamWrap = StreamWrap; | ||
|
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| StreamWrap.prototype.isAlive = function isAlive() { | ||
| return true; | ||
| }; | ||
|
|
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| StreamWrap.prototype.isClosing = function isClosing() { | ||
| return !this.readable || !this.writable; | ||
| }; | ||
|
|
||
| StreamWrap.prototype.readStart = function readStart() { | ||
| this.stream.resume(); | ||
| return 0; | ||
| }; | ||
|
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| StreamWrap.prototype.readStop = function readStop() { | ||
| this.stream.pause(); | ||
| return 0; | ||
| }; | ||
|
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| StreamWrap.prototype.doShutdown = function doShutdown(req) { | ||
| const self = this; | ||
| const handle = this._handle; | ||
| const item = this._enqueue('shutdown', req); | ||
|
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| this.stream.end(function() { | ||
| // Ensure that write was dispatched | ||
| setImmediate(function() { | ||
| if (!self._dequeue(item)) | ||
| return; | ||
|
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| handle.finishShutdown(req, 0); | ||
| }); | ||
| }); | ||
| return 0; | ||
| }; | ||
|
|
||
| StreamWrap.prototype.doWrite = function doWrite(req, bufs) { | ||
| const self = this; | ||
| const handle = self._handle; | ||
|
|
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| var pending = bufs.length; | ||
|
|
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| // Queue the request to be able to cancel it | ||
| const item = self._enqueue('write', req); | ||
|
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| self.stream.cork(); | ||
| for (var n = 0; n < bufs.length; n++) | ||
| self.stream.write(bufs[n], done); | ||
| self.stream.uncork(); | ||
|
|
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| function done(err) { | ||
| if (!err && --pending !== 0) | ||
| return; | ||
|
|
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| // Ensure that this is called once in case of error | ||
| pending = 0; | ||
|
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| let errCode = 0; | ||
| if (err) { | ||
| const code = uv[`UV_${err.code}`]; | ||
| errCode = (err.code && code) ? code : uv.UV_EPIPE; | ||
| } | ||
|
|
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| // Ensure that write was dispatched | ||
| setImmediate(function() { | ||
| // Do not invoke callback twice | ||
| if (!self._dequeue(item)) | ||
| return; | ||
|
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| handle.doAfterWrite(req); | ||
| handle.finishWrite(req, errCode); | ||
| }); | ||
| } | ||
|
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| return 0; | ||
| }; | ||
|
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| function QueueItem(type, req) { | ||
| this.type = type; | ||
| this.req = req; | ||
| this.prev = this; | ||
| this.next = this; | ||
| } | ||
|
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| StreamWrap.prototype._enqueue = function _enqueue(type, req) { | ||
| const item = new QueueItem(type, req); | ||
| if (this._list === null) { | ||
| this._list = item; | ||
| return item; | ||
| } | ||
|
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| item.next = this._list.next; | ||
| item.prev = this._list; | ||
| item.next.prev = item; | ||
| item.prev.next = item; | ||
|
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| return item; | ||
| }; | ||
|
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| StreamWrap.prototype._dequeue = function _dequeue(item) { | ||
| assert(item instanceof QueueItem); | ||
|
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| var next = item.next; | ||
| var prev = item.prev; | ||
|
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| if (next === null && prev === null) | ||
| return false; | ||
|
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| item.next = null; | ||
| item.prev = null; | ||
|
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| if (next === item) { | ||
| prev = null; | ||
| next = null; | ||
| } else { | ||
| prev.next = next; | ||
| next.prev = prev; | ||
| } | ||
|
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| if (this._list === item) | ||
| this._list = next; | ||
|
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| return true; | ||
| }; | ||
|
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| StreamWrap.prototype.doClose = function doClose(cb) { | ||
| const self = this; | ||
| const handle = self._handle; | ||
|
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| setImmediate(function() { | ||
| while (self._list !== null) { | ||
| const item = self._list; | ||
| const req = item.req; | ||
| self._dequeue(item); | ||
|
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| const errCode = uv.UV_ECANCELED; | ||
| if (item.type === 'write') { | ||
| handle.doAfterWrite(req); | ||
| handle.finishWrite(req, errCode); | ||
| } else if (item.type === 'shutdown') { | ||
| handle.finishShutdown(req, errCode); | ||
| } | ||
| } | ||
|
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| // Should be already set by net.js | ||
| assert(self._handle === null); | ||
| cb(); | ||
| }); | ||
| }; | ||
| module.exports = require('internal/wrap_js_stream'); |
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