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/ScriptExecutionContext.h" 35 #include <wtf/Forward.h> 36 #include <wtf/PassOwnPtr.h> 37 38 namespace WebKit { 39 class WebWorkerBase; 40 } 41 42 namespace WebCore { 43 44 // A proxy to talk to the loader context. Normally, the document on the main thread 45 // provides loading services for the subordinate workers. This interface provides 2-way 46 // communications to the Document context and back to the worker. 47 // Note that in multi-process browsers, the Worker object context and the Document 48 // context can be distinct. 49 class WorkerLoaderProxy { 50 public: 51 virtual ~WorkerLoaderProxy() { } 52 53 // Posts a task to the thread which runs the loading code (normally, the main thread). 54 virtual void postTaskToLoader(PassOwnPtr<ScriptExecutionContext::Task>) = 0; 55 56 // Posts callbacks from loading code to the WorkerGlobalScope. The 'mode' is used to differentiate 57 // specific synchronous loading requests so they can be 'nested', per spec. 58 // Returns true if the task was posted successfully. 59 virtual bool postTaskForModeToWorkerGlobalScope(PassOwnPtr<ScriptExecutionContext::Task>, const String& mode) = 0; 60 61 // Spans divergent class hierarchies for dedicated and shared workers. 62 virtual WebKit::WebWorkerBase* toWebWorkerBase() = 0; 63 }; 64 65 } // namespace WebCore 66 67 #endif // WorkerLoaderProxy_h 68
