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/*
* Copyright (C) 2010 Apple Inc. All rights reserved.
* Portions Copyright (c) 2010 Motorola Mobility, 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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.
*/
#ifndef WorkQueue_h
#define WorkQueue_h
#if PLATFORM(MAC)
#if HAVE(DISPATCH_H)
#include <dispatch/dispatch.h>
#endif
#endif
#include "WorkItem.h"
#include <wtf/HashMap.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/RefCounted.h>
#include <wtf/Threading.h>
#include <wtf/Vector.h>
#if PLATFORM(QT)
#include <QSocketNotifier>
#include "PlatformProcessIdentifier.h"
class QObject;
class QThread;
#elif PLATFORM(GTK)
typedef struct _GMainContext GMainContext;
typedef struct _GMainLoop GMainLoop;
#endif
class WorkQueue {
WTF_MAKE_NONCOPYABLE(WorkQueue);
public:
explicit WorkQueue(const char* name);
~WorkQueue();
// Will schedule the given work item to run as soon as possible.
void scheduleWork(PassOwnPtr<WorkItem>);
// Will schedule the given work item to run after the given delay (in seconds).
void scheduleWorkAfterDelay(PassOwnPtr<WorkItem>, double delay);
void invalidate();
#if PLATFORM(MAC)
enum MachPortEventType {
// Fired when there is data on the given receive right.
MachPortDataAvailable,
// Fired when the receive right for this send right has been destroyed.
MachPortDeadNameNotification
};
// Will execute the given work item whenever the given mach port event fires.
// Note that this will adopt the mach port and destroy it when the work queue is invalidated.
void registerMachPortEventHandler(mach_port_t, MachPortEventType, PassOwnPtr<WorkItem>);
void unregisterMachPortEventHandler(mach_port_t);
#elif PLATFORM(WIN)
void registerHandle(HANDLE, PassOwnPtr<WorkItem>);
void unregisterAndCloseHandle(HANDLE);
#elif PLATFORM(QT)
QSocketNotifier* registerSocketEventHandler(int, QSocketNotifier::Type, PassOwnPtr<WorkItem>);
void scheduleWorkOnTermination(WebKit::PlatformProcessIdentifier, PassOwnPtr<WorkItem>);
#elif PLATFORM(GTK)
void registerEventSourceHandler(int, int, PassOwnPtr<WorkItem>);
void unregisterEventSourceHandler(int);
#endif
private:
// FIXME: Use an atomic boolean here instead.
Mutex m_isValidMutex;
bool m_isValid;
void platformInitialize(const char* name);
void platformInvalidate();
#if PLATFORM(MAC)
#if HAVE(DISPATCH_H)
static void executeWorkItem(void*);
Mutex m_eventSourcesMutex;
class EventSource;
HashMap<mach_port_t, EventSource*> m_eventSources;
dispatch_queue_t m_dispatchQueue;
#endif
#elif PLATFORM(WIN)
class WorkItemWin : public ThreadSafeRefCounted<WorkItemWin> {
public:
static PassRefPtr<WorkItemWin> create(PassOwnPtr<WorkItem>, WorkQueue*);
virtual ~WorkItemWin();
WorkItem* item() const { return m_item.get(); }
WorkQueue* queue() const { return m_queue; }
protected:
WorkItemWin(PassOwnPtr<WorkItem>, WorkQueue*);
private:
OwnPtr<WorkItem> m_item;
WorkQueue* m_queue;
};
class HandleWorkItem : public WorkItemWin {
public:
static PassRefPtr<HandleWorkItem> createByAdoptingHandle(HANDLE, PassOwnPtr<WorkItem>, WorkQueue*);
virtual ~HandleWorkItem();
void setWaitHandle(HANDLE waitHandle) { m_waitHandle = waitHandle; }
HANDLE waitHandle() const { return m_waitHandle; }
private:
HandleWorkItem(HANDLE, PassOwnPtr<WorkItem>, WorkQueue*);
HANDLE m_handle;
HANDLE m_waitHandle;
};
static void CALLBACK handleCallback(void* context, BOOLEAN timerOrWaitFired);
static void CALLBACK timerCallback(void* context, BOOLEAN timerOrWaitFired);
static DWORD WINAPI workThreadCallback(void* context);
bool tryRegisterAsWorkThread();
void unregisterAsWorkThread();
void performWorkOnRegisteredWorkThread();
static void unregisterWaitAndDestroyItemSoon(PassRefPtr<HandleWorkItem>);
static DWORD WINAPI unregisterWaitAndDestroyItemCallback(void* context);
volatile LONG m_isWorkThreadRegistered;
Mutex m_workItemQueueLock;
Vector<RefPtr<WorkItemWin> > m_workItemQueue;
Mutex m_handlesLock;
HashMap<HANDLE, RefPtr<HandleWorkItem> > m_handles;
HANDLE m_timerQueue;
#elif PLATFORM(QT)
class WorkItemQt;
HashMap<QObject*, WorkItemQt*> m_signalListeners;
QThread* m_workThread;
friend class WorkItemQt;
#elif PLATFORM(GTK)
static void* startWorkQueueThread(WorkQueue*);
void workQueueThreadBody();
ThreadIdentifier m_workQueueThread;
GMainContext* m_eventContext;
Mutex m_eventLoopLock;
GMainLoop* m_eventLoop;
Mutex m_eventSourcesLock;
class EventSource;
HashMap<int, Vector<EventSource*> > m_eventSources;
typedef HashMap<int, Vector<EventSource*> >::iterator EventSourceIterator;
#endif
};
#endif // WorkQueue_h
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