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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 <glib.h>
#include <wtf/MainThread.h>
namespace WTF {
static GSourceFuncs runLoopSourceFunctions = {
nullptr, // prepare
nullptr, // check
// dispatch
[](GSource* source, GSourceFunc callback, gpointer userData) -> gboolean
{
if (g_source_get_ready_time(source) == -1)
return G_SOURCE_CONTINUE;
g_source_set_ready_time(source, -1);
return callback(userData);
},
nullptr, // finalize
nullptr, // closure_callback
nullptr, // closure_marshall
};
RunLoop::RunLoop()
{
m_mainContext = g_main_context_get_thread_default();
if (!m_mainContext)
m_mainContext = isMainThread() ? g_main_context_default() : adoptGRef(g_main_context_new());
ASSERT(m_mainContext);
GRefPtr<GMainLoop> innermostLoop = adoptGRef(g_main_loop_new(m_mainContext.get(), FALSE));
ASSERT(innermostLoop);
m_mainLoops.append(innermostLoop);
m_source = adoptGRef(g_source_new(&runLoopSourceFunctions, sizeof(GSource)));
g_source_set_name(m_source.get(), "[WebKit] RunLoop work");
g_source_set_can_recurse(m_source.get(), TRUE);
g_source_set_callback(m_source.get(), [](gpointer userData) -> gboolean {
static_cast<RunLoop*>(userData)->performWork();
return G_SOURCE_CONTINUE;
}, this, nullptr);
g_source_attach(m_source.get(), m_mainContext.get());
}
RunLoop::~RunLoop()
{
g_source_destroy(m_source.get());
for (int i = m_mainLoops.size() - 1; i >= 0; --i) {
if (!g_main_loop_is_running(m_mainLoops[i].get()))
continue;
g_main_loop_quit(m_mainLoops[i].get());
}
}
void RunLoop::run()
{
RunLoop& runLoop = RunLoop::current();
GMainContext* mainContext = runLoop.m_mainContext.get();
// The innermost main loop should always be there.
ASSERT(!runLoop.m_mainLoops.isEmpty());
GMainLoop* innermostLoop = runLoop.m_mainLoops[0].get();
if (!g_main_loop_is_running(innermostLoop)) {
g_main_context_push_thread_default(mainContext);
g_main_loop_run(innermostLoop);
g_main_context_pop_thread_default(mainContext);
return;
}
// Create and run a nested loop if the innermost one was already running.
GMainLoop* nestedMainLoop = g_main_loop_new(mainContext, FALSE);
runLoop.m_mainLoops.append(adoptGRef(nestedMainLoop));
g_main_context_push_thread_default(mainContext);
g_main_loop_run(nestedMainLoop);
g_main_context_pop_thread_default(mainContext);
runLoop.m_mainLoops.removeLast();
}
void RunLoop::stop()
{
// The innermost main loop should always be there.
ASSERT(!m_mainLoops.isEmpty());
GRefPtr<GMainLoop> lastMainLoop = m_mainLoops.last();
if (g_main_loop_is_running(lastMainLoop.get()))
g_main_loop_quit(lastMainLoop.get());
}
void RunLoop::wakeUp()
{
g_source_set_ready_time(m_source.get(), g_get_monotonic_time());
}
RunLoop::TimerBase::TimerBase(RunLoop& runLoop)
: m_runLoop(runLoop)
, m_source(adoptGRef(g_source_new(&runLoopSourceFunctions, sizeof(GSource))))
{
g_source_set_name(m_source.get(), "[WebKit] RunLoop::Timer work");
g_source_set_callback(m_source.get(), [](gpointer userData) -> gboolean {
RunLoop::TimerBase* timer = static_cast<RunLoop::TimerBase*>(userData);
timer->fired();
if (timer->m_isRepeating)
timer->updateReadyTime();
return G_SOURCE_CONTINUE;
}, this, nullptr);
g_source_attach(m_source.get(), m_runLoop.m_mainContext.get());
}
RunLoop::TimerBase::~TimerBase()
{
g_source_destroy(m_source.get());
}
void RunLoop::TimerBase::setPriority(int priority)
{
g_source_set_priority(m_source.get(), priority);
}
void RunLoop::TimerBase::updateReadyTime()
{
if (!m_fireInterval.count()) {
g_source_set_ready_time(m_source.get(), 0);
return;
}
gint64 currentTime = g_get_monotonic_time();
gint64 targetTime = currentTime + std::min<gint64>(G_MAXINT64 - currentTime, m_fireInterval.count());
ASSERT(targetTime >= currentTime);
g_source_set_ready_time(m_source.get(), targetTime);
}
void RunLoop::TimerBase::start(double fireInterval, bool repeat)
{
auto intervalDuration = std::chrono::duration<double>(fireInterval);
auto safeDuration = std::chrono::microseconds::max();
if (intervalDuration < safeDuration)
safeDuration = std::chrono::duration_cast<std::chrono::microseconds>(intervalDuration);
m_fireInterval = safeDuration;
m_isRepeating = repeat;
updateReadyTime();
}
void RunLoop::TimerBase::stop()
{
g_source_set_ready_time(m_source.get(), -1);
}
bool RunLoop::TimerBase::isActive() const
{
return g_source_get_ready_time(m_source.get()) != -1;
}
} // namespace WTF
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