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Side by Side Diff: mojo/public/dart/src/client.dart

Issue 814543006: Move //mojo/{public, edk} underneath //third_party (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebase Created 5 years, 11 months 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 part of bindings;
6
7 abstract class Client extends core.MojoEventStreamListener {
8 Map<int, Completer> _completerMap;
9 int _nextId = 0;
10
11 Client(core.MojoMessagePipeEndpoint endpoint) :
12 _completerMap = {},
13 super(endpoint);
14
15 Client.fromHandle(core.MojoHandle handle) :
16 _completerMap = {},
17 super.fromHandle(handle);
18
19 Client.unbound() :
20 _completerMap = {},
21 super.unbound();
22
23 void handleResponse(ServiceMessage reader);
24
25 void handleRead() {
26 // Query how many bytes are available.
27 var result = endpoint.query();
28 assert(result.status.isOk || result.status.isResourceExhausted);
29
30 // Read the data.
31 var bytes = new ByteData(result.bytesRead);
32 var handles = new List<core.MojoHandle>(result.handlesRead);
33 result = endpoint.read(bytes, result.bytesRead, handles);
34 assert(result.status.isOk || result.status.isResourceExhausted);
35 var message = new ServiceMessage.fromMessage(new Message(bytes, handles));
36 handleResponse(message);
37 }
38
39 void handleWrite() {
40 throw 'Unexpected write signal in client.';
41 }
42
43 void sendMessage(Struct message, int name) {
44 if (!isOpen) {
45 listen();
46 }
47 var header = new MessageHeader(name);
48 var serviceMessage = message.serializeWithHeader(header);
49 endpoint.write(serviceMessage.buffer,
50 serviceMessage.buffer.lengthInBytes,
51 serviceMessage.handles);
52 if (!endpoint.status.isOk) {
53 throw "message pipe write failed";
54 }
55 }
56
57 Future sendMessageWithRequestId(
58 Struct message, int name, int id, int flags) {
59 if (!isOpen) {
60 listen();
61 }
62 if (id == -1) {
63 id = _nextId++;
64 }
65
66 var header = new MessageHeader.withRequestId(name, flags, id);
67 var serviceMessage = message.serializeWithHeader(header);
68 endpoint.write(serviceMessage.buffer,
69 serviceMessage.buffer.lengthInBytes,
70 serviceMessage.handles);
71 if (!endpoint.status.isOk) {
72 throw "message pipe write failed";
73 }
74
75 var completer = new Completer();
76 _completerMap[id] = completer;
77 return completer.future;
78 }
79
80 // Need a getter for this for access in subclasses.
81 Map<int, Completer> get completerMap => _completerMap;
82 }
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