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1 // Copyright (c) 2009 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 #ifndef CHROME_RENDERER_WEBWORKER_BASE_H_ | |
6 #define CHROME_RENDERER_WEBWORKER_BASE_H_ | |
7 #pragma once | |
8 | |
9 #include <vector> | |
10 | |
11 #include "base/basictypes.h" | |
12 #include "ipc/ipc_channel.h" | |
13 | |
14 class ChildThread; | |
15 class GURL; | |
16 | |
17 // WebWorkerBase is the common base class used by both WebWorkerProxy and | |
18 // WebSharedWorker. It contains logic to support starting up both dedicated | |
19 // and shared workers, and handling message queueing while waiting for the | |
20 // worker process to start. | |
21 class WebWorkerBase : public IPC::Channel::Listener { | |
22 public: | |
23 virtual ~WebWorkerBase(); | |
24 | |
25 // Creates and initializes a new dedicated worker context. | |
26 void CreateDedicatedWorkerContext(const GURL& script_url, | |
27 const string16& user_agent, | |
28 const string16& source_code) { | |
29 CreateWorkerContext(script_url, false, string16(), user_agent, | |
30 source_code, MSG_ROUTING_NONE, 0); | |
31 } | |
32 | |
33 // Creates and initializes a new shared worker context. | |
34 void CreateSharedWorkerContext(const GURL& script_url, | |
35 const string16& name, | |
36 const string16& user_agent, | |
37 const string16& source_code, | |
38 int pending_route_id, | |
39 int64 script_resource_appcache_id) { | |
40 CreateWorkerContext(script_url, true, name, user_agent, | |
41 source_code, pending_route_id, | |
42 script_resource_appcache_id); | |
43 } | |
44 | |
45 // Returns true if the worker is running (can send messages to it). | |
46 bool IsStarted(); | |
47 | |
48 // Disconnects the worker (stops listening for incoming messages). | |
49 void Disconnect(); | |
50 | |
51 // Sends a message to the worker thread (forwarded via the RenderViewHost). | |
52 // If WorkerStarted() has not yet been called, message is queued. | |
53 bool Send(IPC::Message*); | |
54 | |
55 // Returns true if there are queued messages. | |
56 bool HasQueuedMessages() { return !queued_messages_.empty(); } | |
57 | |
58 // Sends any messages currently in the queue. | |
59 void SendQueuedMessages(); | |
60 | |
61 protected: | |
62 WebWorkerBase(ChildThread* child_thread, | |
63 unsigned long long document_id, | |
64 int route_id, | |
65 int render_view_route_id, | |
66 int parent_appcache_host_id); | |
67 | |
68 // Routing id associated with this worker - used to receive messages from the | |
69 // worker, and also to route messages to the worker (WorkerService contains | |
70 // a map that maps between these renderer-side route IDs and worker-side | |
71 // routing ids). | |
72 int route_id_; | |
73 | |
74 // The routing id for the RenderView that created this worker. | |
75 int render_view_route_id_; | |
76 | |
77 ChildThread* child_thread_; | |
78 | |
79 private: | |
80 void CreateWorkerContext(const GURL& script_url, | |
81 bool is_shared, | |
82 const string16& name, | |
83 const string16& user_agent, | |
84 const string16& source_code, | |
85 int pending_route_id, | |
86 int64 script_resource_appcache_id); | |
87 | |
88 // ID of our parent document (used to shutdown workers when the parent | |
89 // document is detached). | |
90 unsigned long long document_id_; | |
91 | |
92 // ID of our parent's appcache host, only valid for dedicated workers. | |
93 int parent_appcache_host_id_; | |
94 | |
95 // Stores messages that were sent before the StartWorkerContext message. | |
96 std::vector<IPC::Message*> queued_messages_; | |
97 }; | |
98 | |
99 #endif // CHROME_RENDERER_WEBWORKER_BASE_H_ | |
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