1/*
2 * Copyright (C) 2009 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#ifndef WorkerLoaderProxy_h
32#define WorkerLoaderProxy_h
33
34#include "core/dom/ExecutionContext.h"
35#include "wtf/Forward.h"
36#include "wtf/PassOwnPtr.h"
37
38namespace blink {
39
40    // A proxy to talk to the loader context. Normally, the document on the main thread
41    // provides loading services for the subordinate workers. This interface provides 2-way
42    // communications to the Document context and back to the worker.
43    // Note that in multi-process browsers, the Worker object context and the Document
44    // context can be distinct.
45    class WorkerLoaderProxy {
46    public:
47        virtual ~WorkerLoaderProxy() { }
48
49        // Posts a task to the thread which runs the loading code (normally, the main thread).
50        virtual void postTaskToLoader(PassOwnPtr<ExecutionContextTask>) = 0;
51
52        // Posts callbacks from loading code to the WorkerGlobalScope.
53        // Returns true if the task was posted successfully.
54        virtual bool postTaskToWorkerGlobalScope(PassOwnPtr<ExecutionContextTask>) = 0;
55    };
56
57} // namespace blink
58
59#endif // WorkerLoaderProxy_h
60