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/*
* Copyright (C) 2015 Igalia S.L.
*
* 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 "GSocketMonitor.h"
#include <gio/gio.h>
#include <wtf/glib/RunLoopSourcePriority.h>
namespace WTF {
GSocketMonitor::~GSocketMonitor()
{
RELEASE_ASSERT(!m_isExecutingCallback);
stop();
}
gboolean GSocketMonitor::socketSourceCallback(GSocket*, GIOCondition condition, GSocketMonitor* monitor)
{
if (g_cancellable_is_cancelled(monitor->m_cancellable.get()))
return G_SOURCE_REMOVE;
monitor->m_isExecutingCallback = true;
gboolean result = monitor->m_callback(condition);
monitor->m_isExecutingCallback = false;
if (monitor->m_shouldDestroyCallback) {
// Destroying m_callback could also destroy this GSocketMonitor, so that has to be last.
monitor->m_shouldDestroyCallback = false;
monitor->m_callback = nullptr;
}
return result;
}
void GSocketMonitor::start(GSocket* socket, GIOCondition condition, RunLoop& runLoop, Function<gboolean(GIOCondition)>&& callback)
{
stop();
m_cancellable = adoptGRef(g_cancellable_new());
m_source = adoptGRef(g_socket_create_source(socket, condition, m_cancellable.get()));
g_source_set_name(m_source.get(), "[WebKit] Socket monitor");
m_callback = WTFMove(callback);
g_source_set_callback(m_source.get(), reinterpret_cast<GSourceFunc>(reinterpret_cast<GCallback>(socketSourceCallback)), this, nullptr);
g_source_set_priority(m_source.get(), RunLoopSourcePriority::RunLoopDispatcher);
g_source_attach(m_source.get(), runLoop.mainContext());
}
void GSocketMonitor::stop()
{
if (!m_source)
return;
g_cancellable_cancel(m_cancellable.get());
m_cancellable = nullptr;
g_source_destroy(m_source.get());
m_source = nullptr;
// It's normal to stop the socket monitor from inside its callback.
// Don't destroy the callback while it's still executing.
if (m_isExecutingCallback)
m_shouldDestroyCallback = true;
else
m_callback = nullptr;
}
} // namespace WTF
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