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Issue 703273002: Update mojo sdk to rev 04a510fb37db10642e156957f9b2c11c2f6442ac (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Fix content/child -> mojo/common linking Created 6 years, 1 month ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 define("mojo/public/js/bindings/connector", [
6 "mojo/public/js/bindings/buffer",
7 "mojo/public/js/bindings/codec",
8 "mojo/public/js/bindings/core",
9 "mojo/public/js/bindings/support",
10 ], function(buffer, codec, core, support) {
11
12 function Connector(handle) {
13 this.handle_ = handle;
14 this.dropWrites_ = false;
15 this.error_ = false;
16 this.incomingReceiver_ = null;
17 this.readWaitCookie_ = null;
18 this.errorHandler_ = null;
19
20 this.waitToReadMore_();
21 }
22
23 Connector.prototype.close = function() {
24 if (this.readWaitCookie_) {
25 support.cancelWait(this.readWaitCookie_);
26 this.readWaitCookie_ = null;
27 }
28 if (this.handle_ != null) {
29 core.close(this.handle_);
30 this.handle_ = null;
31 }
32 };
33
34 Connector.prototype.accept = function(message) {
35 if (this.error_)
36 return false;
37
38 if (this.dropWrites_)
39 return true;
40
41 var result = core.writeMessage(this.handle_,
42 new Uint8Array(message.buffer.arrayBuffer),
43 message.handles,
44 core.WRITE_MESSAGE_FLAG_NONE);
45 switch (result) {
46 case core.RESULT_OK:
47 // The handles were successfully transferred, so we don't own them
48 // anymore.
49 message.handles = [];
50 break;
51 case core.RESULT_FAILED_PRECONDITION:
52 // There's no point in continuing to write to this pipe since the other
53 // end is gone. Avoid writing any future messages. Hide write failures
54 // from the caller since we'd like them to continue consuming any
55 // backlog of incoming messages before regarding the message pipe as
56 // closed.
57 this.dropWrites_ = true;
58 break;
59 default:
60 // This particular write was rejected, presumably because of bad input.
61 // The pipe is not necessarily in a bad state.
62 return false;
63 }
64 return true;
65 };
66
67 Connector.prototype.setIncomingReceiver = function(receiver) {
68 this.incomingReceiver_ = receiver;
69 };
70
71 Connector.prototype.setErrorHandler = function(handler) {
72 this.errorHandler_ = handler;
73 };
74
75 Connector.prototype.encounteredError = function() {
76 return this.error_;
77 };
78
79 Connector.prototype.waitToReadMore_ = function() {
80 this.readWaitCookie_ = support.asyncWait(this.handle_,
81 core.HANDLE_SIGNAL_READABLE,
82 this.readMore_.bind(this));
83 };
84
85 Connector.prototype.readMore_ = function(result) {
86 for (;;) {
87 var read = core.readMessage(this.handle_,
88 core.READ_MESSAGE_FLAG_NONE);
89 if (read.result == core.RESULT_SHOULD_WAIT) {
90 this.waitToReadMore_();
91 return;
92 }
93 if (read.result != core.RESULT_OK) {
94 this.error_ = true;
95 if (this.errorHandler_)
96 this.errorHandler_.onError(read.result);
97 return;
98 }
99 var messageBuffer = new buffer.Buffer(read.buffer);
100 var message = new codec.Message(messageBuffer, read.handles);
101 if (this.incomingReceiver_) {
102 this.incomingReceiver_.accept(message);
103 }
104 }
105 };
106
107 // The TestConnector subclass is only intended to be used in unit tests. It
108 // enables delivering a message to the pipe's handle without an async wait.
109
110 function TestConnector(handle) {
111 Connector.call(this, handle);
112 }
113
114 TestConnector.prototype = Object.create(Connector.prototype);
115
116 TestConnector.prototype.waitToReadMore_ = function() {
117 };
118
119 TestConnector.prototype.deliverMessage = function() {
120 this.readMore_(core.RESULT_OK);
121 }
122
123 var exports = {};
124 exports.Connector = Connector;
125 exports.TestConnector = TestConnector;
126 return exports;
127 });
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