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/*
* Copyright (C) 2024 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#if USE(GLIB)
#include "GRefPtr.h"
#include <glib-object.h>
#include <wtf/Noncopyable.h>
namespace WTF {
template <typename T> class GThreadSafeWeakPtr {
WTF_MAKE_NONCOPYABLE(GThreadSafeWeakPtr);
public:
GThreadSafeWeakPtr()
{
g_weak_ref_init(&m_ref, nullptr);
}
explicit GThreadSafeWeakPtr(T* ptr)
{
RELEASE_ASSERT(!ptr || G_IS_OBJECT(ptr));
g_weak_ref_init(&m_ref, ptr);
}
GThreadSafeWeakPtr(GThreadSafeWeakPtr&& other)
{
auto strongRef = other.get();
g_weak_ref_set(&other.m_ref, nullptr);
g_weak_ref_init(&m_ref, strongRef.get());
}
~GThreadSafeWeakPtr()
{
g_weak_ref_clear(&m_ref);
}
WARN_UNUSED_RETURN GRefPtr<T> get()
{
return adoptGRef(reinterpret_cast<T*>(g_weak_ref_get(&m_ref)));
}
void reset(T* ptr = nullptr)
{
RELEASE_ASSERT(!ptr || G_IS_OBJECT(ptr));
g_weak_ref_set(&m_ref, ptr);
}
GThreadSafeWeakPtr& operator=(std::nullptr_t)
{
reset();
return *this;
}
private:
GWeakRef m_ref;
};
} // namespace WTF
using WTF::GThreadSafeWeakPtr;
#endif // USE(GLIB)
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