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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 |
| (...skipping 14 matching lines...) Expand all Loading... |
| 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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