blob: 0cdb92f09ec4b94e0e2d23b9f068b462ddb99b2b [file] [log] [blame]
/*
* Copyright (C) 2011 Igalia S.L.
* 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.
*/
#include "config.h"
#include "WorkQueue.h"
#include "WKBase.h"
#include <WebCore/NotImplemented.h>
#include <gio/gio.h>
#include <glib.h>
#include <wtf/gobject/GRefPtr.h>
// WorkQueue::EventSource
class WorkQueue::EventSource {
public:
EventSource(PassOwnPtr<WorkItem> workItem, WorkQueue* workQueue, GCancellable* cancellable)
: m_workItem(workItem)
, m_workQueue(workQueue)
, m_cancellable(cancellable)
{
}
void cancel()
{
if (!m_cancellable)
return;
g_cancellable_cancel(m_cancellable);
}
static void executeEventSource(EventSource* eventSource)
{
ASSERT(eventSource);
WorkQueue* queue = eventSource->m_workQueue;
{
MutexLocker locker(queue->m_isValidMutex);
if (!queue->m_isValid)
return;
}
eventSource->m_workItem->execute();
}
static gboolean performWorkOnce(EventSource* eventSource)
{
executeEventSource(eventSource);
return FALSE;
}
static gboolean performWork(GSocket* socket, GIOCondition condition, EventSource* eventSource)
{
if (!(condition & G_IO_IN) && !(condition & G_IO_HUP) && !(condition & G_IO_ERR)) {
// EventSource has been cancelled, return FALSE to destroy the source.
return FALSE;
}
executeEventSource(eventSource);
return TRUE;
}
static gboolean performWorkOnTermination(GPid, gint, EventSource* eventSource)
{
executeEventSource(eventSource);
return FALSE;
}
static void deleteEventSource(EventSource* eventSource)
{
ASSERT(eventSource);
delete eventSource;
}
public:
PassOwnPtr<WorkItem> m_workItem;
WorkQueue* m_workQueue;
GCancellable* m_cancellable;
};
// WorkQueue
void WorkQueue::platformInitialize(const char* name)
{
m_eventContext = g_main_context_new();
ASSERT(m_eventContext);
m_eventLoop = g_main_loop_new(m_eventContext, FALSE);
ASSERT(m_eventLoop);
m_workQueueThread = createThread(reinterpret_cast<WTF::ThreadFunction>(&WorkQueue::startWorkQueueThread), this, name);
}
void WorkQueue::platformInvalidate()
{
MutexLocker locker(m_eventLoopLock);
if (m_eventLoop) {
if (g_main_loop_is_running(m_eventLoop))
g_main_loop_quit(m_eventLoop);
g_main_loop_unref(m_eventLoop);
m_eventLoop = 0;
}
if (m_eventContext) {
g_main_context_unref(m_eventContext);
m_eventContext = 0;
}
}
void* WorkQueue::startWorkQueueThread(WorkQueue* workQueue)
{
workQueue->workQueueThreadBody();
return 0;
}
void WorkQueue::workQueueThreadBody()
{
g_main_loop_run(m_eventLoop);
}
void WorkQueue::registerEventSourceHandler(int fileDescriptor, int condition, PassOwnPtr<WorkItem> item)
{
GRefPtr<GSocket> socket = adoptGRef(g_socket_new_from_fd(fileDescriptor, 0));
ASSERT(socket);
GRefPtr<GCancellable> cancellable = adoptGRef(g_cancellable_new());
GRefPtr<GSource> dispatchSource = adoptGRef(g_socket_create_source(socket.get(), static_cast<GIOCondition>(condition), cancellable.get()));
ASSERT(dispatchSource);
EventSource* eventSource = new EventSource(item, this, cancellable.get());
ASSERT(eventSource);
g_source_set_callback(dispatchSource.get(), reinterpret_cast<GSourceFunc>(&WorkQueue::EventSource::performWork),
eventSource, reinterpret_cast<GDestroyNotify>(&WorkQueue::EventSource::deleteEventSource));
// Set up the event sources under the mutex since this is shared across multiple threads.
{
MutexLocker locker(m_eventSourcesLock);
Vector<EventSource*> sources;
EventSourceIterator it = m_eventSources.find(fileDescriptor);
if (it != m_eventSources.end())
sources = it->second;
sources.append(eventSource);
m_eventSources.set(fileDescriptor, sources);
}
g_source_attach(dispatchSource.get(), m_eventContext);
}
void WorkQueue::unregisterEventSourceHandler(int fileDescriptor)
{
ASSERT(fileDescriptor);
MutexLocker locker(m_eventSourcesLock);
EventSourceIterator it = m_eventSources.find(fileDescriptor);
ASSERT(it != m_eventSources.end());
ASSERT(m_eventSources.contains(fileDescriptor));
if (it != m_eventSources.end()) {
Vector<EventSource*> sources = it->second;
for (unsigned i = 0; i < sources.size(); i++)
sources[i]->cancel();
m_eventSources.remove(it);
}
}
void WorkQueue::scheduleWorkOnSource(GSource* dispatchSource, PassOwnPtr<WorkItem> item, GSourceFunc sourceCallback)
{
EventSource* eventSource = new EventSource(item, this, 0);
g_source_set_callback(dispatchSource, sourceCallback, eventSource,
reinterpret_cast<GDestroyNotify>(&WorkQueue::EventSource::deleteEventSource));
g_source_attach(dispatchSource, m_eventContext);
}
void WorkQueue::scheduleWork(PassOwnPtr<WorkItem> item)
{
GRefPtr<GSource> dispatchSource = adoptGRef(g_idle_source_new());
ASSERT(dispatchSource);
g_source_set_priority(dispatchSource.get(), G_PRIORITY_DEFAULT);
scheduleWorkOnSource(dispatchSource.get(), item, reinterpret_cast<GSourceFunc>(&WorkQueue::EventSource::performWorkOnce));
}
void WorkQueue::scheduleWorkAfterDelay(PassOwnPtr<WorkItem> item, double delay)
{
GRefPtr<GSource> dispatchSource = adoptGRef(g_timeout_source_new(static_cast<guint>(delay * 1000)));
ASSERT(dispatchSource);
scheduleWorkOnSource(dispatchSource.get(), item, reinterpret_cast<GSourceFunc>(&WorkQueue::EventSource::performWorkOnce));
}
void WorkQueue::scheduleWorkOnTermination(WebKit::PlatformProcessIdentifier process, PassOwnPtr<WorkItem> item)
{
GRefPtr<GSource> dispatchSource = adoptGRef(g_child_watch_source_new(process));
ASSERT(dispatchSource);
scheduleWorkOnSource(dispatchSource.get(), item, reinterpret_cast<GSourceFunc>(&WorkQueue::EventSource::performWorkOnTermination));
}