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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.
*/
#include "config.h"
#include "RunLoop.h"
#include <gdk/gdk.h>
#include <glib.h>
#include <wtf/MainThread.h>
namespace WebCore {
RunLoop::RunLoop()
{
// g_main_context_default() doesn't add an extra reference.
m_runLoopContext = isMainThread() ? g_main_context_default() : adoptGRef(g_main_context_new());
ASSERT(m_runLoopContext);
GRefPtr<GMainLoop> innermostLoop = adoptGRef(g_main_loop_new(m_runLoopContext.get(), FALSE));
ASSERT(innermostLoop);
m_runLoopMainLoops.append(innermostLoop);
}
RunLoop::~RunLoop()
{
for (int i = m_runLoopMainLoops.size() - 1; i >= 0; --i) {
if (!g_main_loop_is_running(m_runLoopMainLoops[i].get()))
continue;
g_main_loop_quit(m_runLoopMainLoops[i].get());
}
}
void RunLoop::run()
{
RunLoop* mainRunLoop = RunLoop::current();
GMainLoop* innermostLoop = mainRunLoop->innermostLoop();
if (!g_main_loop_is_running(innermostLoop)) {
g_main_loop_run(innermostLoop);
return;
}
// Create and run a nested loop if the innermost one was already running.
GMainLoop* nestedMainLoop = g_main_loop_new(0, FALSE);
mainRunLoop->pushNestedMainLoop(nestedMainLoop);
g_main_loop_run(nestedMainLoop);
mainRunLoop->popNestedMainLoop();
}
GMainLoop* RunLoop::innermostLoop()
{
// The innermost main loop should always be there.
ASSERT(!m_runLoopMainLoops.isEmpty());
return m_runLoopMainLoops[0].get();
}
void RunLoop::pushNestedMainLoop(GMainLoop* nestedLoop)
{
// The innermost main loop should always be there.
ASSERT(!m_runLoopMainLoops.isEmpty());
m_runLoopMainLoops.append(adoptGRef(nestedLoop));
}
void RunLoop::popNestedMainLoop()
{
// The innermost main loop should always be there.
ASSERT(!m_runLoopMainLoops.isEmpty());
m_runLoopMainLoops.removeLast();
}
void RunLoop::stop()
{
// The innermost main loop should always be there.
ASSERT(!m_runLoopMainLoops.isEmpty());
GRefPtr<GMainLoop> lastMainLoop = m_runLoopMainLoops.last();
if (g_main_loop_is_running(lastMainLoop.get()))
g_main_loop_quit(lastMainLoop.get());
}
gboolean RunLoop::queueWork(RunLoop* runLoop)
{
runLoop->performWork();
return FALSE;
}
void RunLoop::wakeUp()
{
GRefPtr<GSource> source = adoptGRef(g_idle_source_new());
g_source_set_priority(source.get(), G_PRIORITY_DEFAULT);
g_source_set_callback(source.get(), reinterpret_cast<GSourceFunc>(&RunLoop::queueWork), this, 0);
g_source_attach(source.get(), m_runLoopContext.get());
g_main_context_wakeup(m_runLoopContext.get());
}
RunLoop::TimerBase::TimerBase(RunLoop* runLoop)
: m_runLoop(runLoop)
, m_timerSource(0)
{
}
RunLoop::TimerBase::~TimerBase()
{
stop();
}
void RunLoop::TimerBase::clearTimerSource()
{
m_timerSource = 0;
}
gboolean RunLoop::TimerBase::timerFiredCallback(RunLoop::TimerBase* timer)
{
GSource* currentTimerSource = timer->m_timerSource.get();
bool isRepeating = timer->isRepeating();
// This can change the timerSource by starting a new timer within the callback.
if (!isRepeating && currentTimerSource == timer->m_timerSource.get())
timer->clearTimerSource();
timer->fired();
return isRepeating;
}
void RunLoop::TimerBase::start(double fireInterval, bool repeat)
{
if (m_timerSource)
stop();
m_timerSource = adoptGRef(g_timeout_source_new(static_cast<guint>(fireInterval * 1000)));
m_isRepeating = repeat;
g_source_set_callback(m_timerSource.get(), reinterpret_cast<GSourceFunc>(&RunLoop::TimerBase::timerFiredCallback), this, 0);
g_source_attach(m_timerSource.get(), m_runLoop->m_runLoopContext.get());
}
void RunLoop::TimerBase::stop()
{
if (!m_timerSource)
return;
g_source_destroy(m_timerSource.get());
clearTimerSource();
}
bool RunLoop::TimerBase::isActive() const
{
return m_timerSource;
}
} // namespace WebCore
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