| /* |
| * Copyright (C) 2010 Google Inc. All Rights Reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include "core/workers/WorkerEventQueue.h" |
| |
| #include "core/dom/ExecutionContext.h" |
| #include "core/dom/ExecutionContextTask.h" |
| #include "core/events/Event.h" |
| #include "core/inspector/InspectorInstrumentation.h" |
| |
| namespace blink { |
| |
| PassOwnPtrWillBeRawPtr<WorkerEventQueue> WorkerEventQueue::create(ExecutionContext* context) |
| { |
| return adoptPtrWillBeNoop(new WorkerEventQueue(context)); |
| } |
| |
| WorkerEventQueue::WorkerEventQueue(ExecutionContext* context) |
| : m_executionContext(context) |
| , m_isClosed(false) |
| { |
| } |
| |
| WorkerEventQueue::~WorkerEventQueue() |
| { |
| ASSERT(m_eventTaskMap.isEmpty()); |
| } |
| |
| DEFINE_TRACE(WorkerEventQueue) |
| { |
| #if ENABLE(OILPAN) |
| visitor->trace(m_executionContext); |
| visitor->trace(m_eventTaskMap); |
| #endif |
| EventQueue::trace(visitor); |
| } |
| |
| class WorkerEventQueue::EventDispatcherTask : public ExecutionContextTask { |
| public: |
| static PassOwnPtr<EventDispatcherTask> create(PassRefPtrWillBeRawPtr<Event> event, WorkerEventQueue* eventQueue) |
| { |
| return adoptPtr(new EventDispatcherTask(event, eventQueue)); |
| } |
| |
| ~EventDispatcherTask() override |
| { |
| if (m_event) |
| m_eventQueue->removeEvent(m_event.get()); |
| } |
| |
| void dispatchEvent(ExecutionContext*, PassRefPtrWillBeRawPtr<Event> prpEvent) |
| { |
| // Stash the event on the stack in a RefPtrWillBeRawPtr; trying to do this |
| // in a single line causes an optimization bug with MSVC. MSVC generates code |
| // that passes the event arg (forcing PassRefPtrWillBeRawPtr to be released) |
| // before the target is queried. |
| RefPtrWillBeRawPtr<Event> event = prpEvent; |
| event->target()->dispatchEvent(event); |
| } |
| |
| virtual void performTask(ExecutionContext* context) |
| { |
| if (m_isCancelled) |
| return; |
| m_eventQueue->removeEvent(m_event.get()); |
| dispatchEvent(context, m_event); |
| m_event.clear(); |
| } |
| |
| void cancel() |
| { |
| m_isCancelled = true; |
| m_event.clear(); |
| } |
| |
| private: |
| EventDispatcherTask(PassRefPtrWillBeRawPtr<Event> event, WorkerEventQueue* eventQueue) |
| : m_event(event) |
| , m_eventQueue(eventQueue) |
| , m_isCancelled(false) |
| { |
| } |
| |
| RefPtrWillBePersistent<Event> m_event; |
| RawPtrWillBePersistent<WorkerEventQueue> m_eventQueue; |
| bool m_isCancelled; |
| }; |
| |
| void WorkerEventQueue::removeEvent(Event* event) |
| { |
| InspectorInstrumentation::didRemoveEvent(event->target(), event); |
| m_eventTaskMap.remove(event); |
| } |
| |
| bool WorkerEventQueue::enqueueEvent(PassRefPtrWillBeRawPtr<Event> prpEvent) |
| { |
| if (m_isClosed) |
| return false; |
| RefPtrWillBeRawPtr<Event> event = prpEvent; |
| InspectorInstrumentation::didEnqueueEvent(event->target(), event.get()); |
| OwnPtr<EventDispatcherTask> task = EventDispatcherTask::create(event, this); |
| m_eventTaskMap.add(event.release(), task.get()); |
| m_executionContext->postTask(BLINK_FROM_HERE, task.release()); |
| return true; |
| } |
| |
| bool WorkerEventQueue::cancelEvent(Event* event) |
| { |
| EventDispatcherTask* task = m_eventTaskMap.get(event); |
| if (!task) |
| return false; |
| task->cancel(); |
| removeEvent(event); |
| return true; |
| } |
| |
| void WorkerEventQueue::close() |
| { |
| m_isClosed = true; |
| for (const auto& entry : m_eventTaskMap) { |
| Event* event = entry.key.get(); |
| EventDispatcherTask* task = entry.value; |
| InspectorInstrumentation::didRemoveEvent(event->target(), event); |
| task->cancel(); |
| } |
| m_eventTaskMap.clear(); |
| } |
| |
| } // namespace blink |