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| 1 // Copyright 2013 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/apps/js/bindings/connector", [ | |
| 6 "mojo/apps/js/bindings/codec", | |
| 7 "mojo/apps/js/bindings/core", | |
| 8 "mojo/apps/js/bindings/support", | |
| 9 ], function(codec, core, support) { | |
| 10 | |
| 11 function Connector(handle) { | |
| 12 this.handle_ = handle; | |
| 13 this.error_ = false; | |
| 14 this.incomingReceiver_ = null; | |
| 15 this.readWaitCookie_ = null; | |
| 16 } | |
| 17 | |
| 18 Connector.prototype.close = function() { | |
| 19 if (this.readWaitCookie_) { | |
| 20 support.cancelWait(this.readWaitCookie_); | |
| 21 this.readWaitCookie_ = null; | |
| 22 } | |
| 23 if (this.handle_ != core.kInvalidHandle) { | |
| 24 core.close(this.handle_); | |
| 25 this.handle_ = core.kInvalidHandle; | |
| 26 } | |
| 27 }; | |
| 28 | |
| 29 Connector.prototype.accept = function(message) { | |
| 30 if (this.error_) | |
| 31 return false; | |
| 32 this.write_(message); | |
| 33 return !this.error_; | |
| 34 }; | |
| 35 | |
| 36 Connector.prototype.setIncomingReceiver = function(receiver) { | |
| 37 this.incomingReceiver_ = receiver; | |
| 38 if (this.incomingReceiver_) | |
| 39 this.waitToReadMore_(); | |
| 40 }; | |
| 41 | |
| 42 Connector.prototype.write_ = function(message) { | |
| 43 var result = core.writeMessage(this.handle_, | |
| 44 message.memory, | |
| 45 message.handles, | |
| 46 core.WRITE_MESSAGE_FLAG_NONE); | |
| 47 if (result != core.RESULT_OK) { | |
| 48 this.error_ = true | |
| 49 return; | |
| 50 } | |
| 51 // The handles were successfully transferred, so we don't own them anymore. | |
| 52 message.handles = []; | |
| 53 }; | |
| 54 | |
| 55 Connector.prototype.waitToReadMore_ = function() { | |
| 56 this.readWaitCookie_ = support.asyncWait(this.handle_, | |
| 57 core.WAIT_FLAG_READABLE, | |
| 58 this.readMore_.bind(this)); | |
| 59 }; | |
| 60 | |
| 61 Connector.prototype.readMore_ = function(result) { | |
| 62 for (;;) { | |
| 63 var read = core.readMessage(this.handle_, | |
| 64 core.READ_MESSAGE_FLAG_NONE); | |
| 65 if (read.result == core.RESULT_SHOULD_WAIT) { | |
| 66 this.waitToReadMore_(); | |
| 67 return; | |
| 68 } | |
| 69 if (read.result != core.RESULT_OK) { | |
| 70 this.error_ = true; | |
| 71 return; | |
| 72 } | |
| 73 // TODO(abarth): Should core.readMessage return a Uint8Array? | |
| 74 var memory = new Uint8Array(read.buffer); | |
| 75 var message = new codec.Message(memory, read.handles); | |
| 76 this.incomingReceiver_.accept(message); | |
| 77 } | |
| 78 }; | |
| 79 | |
| 80 function Connection(handle, localFactory, remoteFactory) { | |
| 81 this.connector_ = new Connector(handle); | |
| 82 this.remote = new remoteFactory(this.connector_); | |
| 83 this.local = new localFactory(this.remote); | |
| 84 this.connector_.setIncomingReceiver(this.local); | |
| 85 } | |
| 86 | |
| 87 Connection.prototype.close = function() { | |
| 88 this.connector_.close(); | |
| 89 this.connector_ = null; | |
| 90 this.local = null; | |
| 91 this.remote = null; | |
| 92 }; | |
| 93 | |
| 94 var exports = {}; | |
| 95 exports.Connection = Connection; | |
| 96 return exports; | |
| 97 }); | |
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