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1 /* | 1 /* |
2 * Copyright (C) 2010 Google Inc. All rights reserved. | 2 * Copyright (C) 2010 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #ifndef WorkerFileWriterCallbacksBridge_h | 31 #ifndef WorkerFileWriterCallbacksBridge_h |
32 #define WorkerFileWriterCallbacksBridge_h | 32 #define WorkerFileWriterCallbacksBridge_h |
33 | 33 |
34 #include "WebFileWriterClient.h" | 34 #include "WebFileWriterClient.h" |
35 #include "core/workers/WorkerContext.h" | 35 #include "core/workers/WorkerGlobalScope.h" |
36 #include "public/platform/WebFileError.h" | 36 #include "public/platform/WebFileError.h" |
37 #include "wtf/PassOwnPtr.h" | 37 #include "wtf/PassOwnPtr.h" |
38 #include "wtf/PassRefPtr.h" | 38 #include "wtf/PassRefPtr.h" |
39 #include "wtf/ThreadSafeRefCounted.h" | 39 #include "wtf/ThreadSafeRefCounted.h" |
40 | 40 |
41 namespace WebCore { | 41 namespace WebCore { |
42 class AsyncFileWriterClient; | 42 class AsyncFileWriterClient; |
43 class KURL; | 43 class KURL; |
44 class WorkerLoaderProxy; | 44 class WorkerLoaderProxy; |
45 } | 45 } |
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71 // --> Bridge::didWriteOnWorkerThread is called on WorkerThread | 71 // --> Bridge::didWriteOnWorkerThread is called on WorkerThread |
72 // This calls the original client (m_clientOnWorkerThread). | 72 // This calls the original client (m_clientOnWorkerThread). |
73 // | 73 // |
74 // The bridge object is refcounted, so that it doesn't get deleted while there | 74 // The bridge object is refcounted, so that it doesn't get deleted while there |
75 // are cross-thread calls in flight. Each CrossThreadTask carries a reference | 75 // are cross-thread calls in flight. Each CrossThreadTask carries a reference |
76 // to the bridge, which guarantees that the bridge will still be valid when the | 76 // to the bridge, which guarantees that the bridge will still be valid when the |
77 // task is executed. In order to shut down the bridge, the WebFileWriterClient | 77 // task is executed. In order to shut down the bridge, the WebFileWriterClient |
78 // should call postShutdownToMainThread before dropping its reference to the | 78 // should call postShutdownToMainThread before dropping its reference to the |
79 // bridge. This ensures that the WebFileWriter will be cleared on the main | 79 // bridge. This ensures that the WebFileWriter will be cleared on the main |
80 // thread and that no further calls to the WebFileWriterClient will be made. | 80 // thread and that no further calls to the WebFileWriterClient will be made. |
81 class WorkerFileWriterCallbacksBridge : public ThreadSafeRefCounted<WorkerFileWr
iterCallbacksBridge>, public WebCore::WorkerContext::Observer, public WebFileWri
terClient { | 81 class WorkerFileWriterCallbacksBridge : public ThreadSafeRefCounted<WorkerFileWr
iterCallbacksBridge>, public WebCore::WorkerGlobalScope::Observer, public WebFil
eWriterClient { |
82 public: | 82 public: |
83 ~WorkerFileWriterCallbacksBridge(); | 83 ~WorkerFileWriterCallbacksBridge(); |
84 | 84 |
85 // WorkerContext::Observer method. | 85 // WorkerGlobalScope::Observer method. |
86 virtual void notifyStop(); | 86 virtual void notifyStop(); |
87 | 87 |
88 static PassRefPtr<WorkerFileWriterCallbacksBridge> create(const WebCore::KUR
L& path, WebCore::WorkerLoaderProxy* proxy, WebCore::ScriptExecutionContext* wor
kerContext, WebCore::AsyncFileWriterClient* client) | 88 static PassRefPtr<WorkerFileWriterCallbacksBridge> create(const WebCore::KUR
L& path, WebCore::WorkerLoaderProxy* proxy, WebCore::ScriptExecutionContext* wor
kerGlobalScope, WebCore::AsyncFileWriterClient* client) |
89 { | 89 { |
90 return adoptRef(new WorkerFileWriterCallbacksBridge(path, proxy, workerC
ontext, client)); | 90 return adoptRef(new WorkerFileWriterCallbacksBridge(path, proxy, workerG
lobalScope, client)); |
91 } | 91 } |
92 | 92 |
93 // Methods that create an instance and post an initial request task to the m
ain thread. They must be called on the worker thread. | 93 // Methods that create an instance and post an initial request task to the m
ain thread. They must be called on the worker thread. |
94 void postWriteToMainThread(long long position, const WebCore::KURL& data); | 94 void postWriteToMainThread(long long position, const WebCore::KURL& data); |
95 void postTruncateToMainThread(long long length); | 95 void postTruncateToMainThread(long long length); |
96 void postAbortToMainThread(); | 96 void postAbortToMainThread(); |
97 | 97 |
98 // The owning WorkerAsyncFileWriterChromium should call this method before d
ropping its last reference to the bridge, on the context thread. | 98 // The owning WorkerAsyncFileWriterChromium should call this method before d
ropping its last reference to the bridge, on the context thread. |
99 // The actual deletion of the WorkerFileWriterCallbacksBridge may happen on
either the main or context thread, depending on where the last reference goes aw
ay; that's safe as long as this is called first. | 99 // The actual deletion of the WorkerFileWriterCallbacksBridge may happen on
either the main or context thread, depending on where the last reference goes aw
ay; that's safe as long as this is called first. |
100 void postShutdownToMainThread(PassRefPtr<WorkerFileWriterCallbacksBridge>); | 100 void postShutdownToMainThread(PassRefPtr<WorkerFileWriterCallbacksBridge>); |
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135 // Called on the main thread to dispatch to the worker thread. | 135 // Called on the main thread to dispatch to the worker thread. |
136 void dispatchTaskToWorkerThread(PassOwnPtr<WebCore::ScriptExecutionContext::
Task>); | 136 void dispatchTaskToWorkerThread(PassOwnPtr<WebCore::ScriptExecutionContext::
Task>); |
137 | 137 |
138 // Used from the main thread to post tasks to the context thread. | 138 // Used from the main thread to post tasks to the context thread. |
139 WebCore::WorkerLoaderProxy* m_proxy; | 139 WebCore::WorkerLoaderProxy* m_proxy; |
140 | 140 |
141 // Mutex for proxy. | 141 // Mutex for proxy. |
142 Mutex m_loaderProxyMutex; | 142 Mutex m_loaderProxyMutex; |
143 | 143 |
144 // Used on the context thread, only to check that we're running on the conte
xt thread. | 144 // Used on the context thread, only to check that we're running on the conte
xt thread. |
145 WebCore::ScriptExecutionContext* m_workerContext; | 145 WebCore::ScriptExecutionContext* m_workerGlobalScope; |
146 | 146 |
147 // Created and destroyed from the main thread. | 147 // Created and destroyed from the main thread. |
148 OwnPtr<WebKit::WebFileWriter> m_writer; | 148 OwnPtr<WebKit::WebFileWriter> m_writer; |
149 | 149 |
150 // Used on the context thread to call back into the client. | 150 // Used on the context thread to call back into the client. |
151 WebCore::AsyncFileWriterClient* m_clientOnWorkerThread; | 151 WebCore::AsyncFileWriterClient* m_clientOnWorkerThread; |
152 | 152 |
153 // Used to indicate that shutdown has started on the main thread, and hence
the writer has been deleted. | 153 // Used to indicate that shutdown has started on the main thread, and hence
the writer has been deleted. |
154 bool m_writerDeleted; | 154 bool m_writerDeleted; |
155 | 155 |
156 // Used by waitForOperationToComplete. | 156 // Used by waitForOperationToComplete. |
157 bool m_operationInProgress; | 157 bool m_operationInProgress; |
158 | 158 |
159 // Used by postTaskForModeToWorkerContext and runInMode. | 159 // Used by postTaskForModeToWorkerGlobalScope and runInMode. |
160 String m_mode; | 160 String m_mode; |
161 }; | 161 }; |
162 | 162 |
163 } // namespace WebCore | 163 } // namespace WebCore |
164 | 164 |
165 #endif // WorkerFileWriterCallbacksBridge_h | 165 #endif // WorkerFileWriterCallbacksBridge_h |
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