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/* Copyright (C) 2007 The gtkmm Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gio/gio.h>
namespace
{
class SlotWithData
{
public:
SlotWithData(const Gio::MemoryInputStream::SlotDestroyData& slot, void* data)
: m_slot(new Gio::MemoryInputStream::SlotDestroyData(slot)), m_data(data)
{
}
SlotWithData(const SlotWithData& src) = delete;
SlotWithData& operator=(const SlotWithData& src) = delete;
~SlotWithData() { delete m_slot; }
void operator()() { (*m_slot)(m_data); }
private:
Gio::MemoryInputStream::SlotDestroyData* m_slot;
void* m_data;
};
extern "C"
{
// Shall be static. Non-static functions with C linkage get external linkage,
// even if they are defined in an anonymous namespace.
static void
destroy_data_callback(void* user_data)
{
auto slot_with_data = static_cast<SlotWithData*>(user_data);
g_return_if_fail(slot_with_data != nullptr);
try
{
(*slot_with_data)(); // Invoke callback
}
catch (...)
{
Glib::exception_handlers_invoke();
}
delete slot_with_data;
}
} // extern "C"
} // anonymous namespace
namespace Gio
{
void
MemoryInputStream::add_data(const void* data, gssize len, const SlotDestroyData& destroy_slot)
{
auto slot_with_data = new SlotWithData(destroy_slot, const_cast<void*>(data));
auto bytes = g_bytes_new_with_free_func(data, len, &destroy_data_callback, slot_with_data);
g_memory_input_stream_add_bytes(gobj(), bytes);
g_bytes_unref(bytes); // g_memory_input_stream_add_bytes() takes a reference
}
} // namespace Gio
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